Study Highlights:
EBV infection and the latency proteins EBNA1, LMP1, and EBNA2 increase NEK2 expression in human B cells and patient tumors. Genetic depletion or pharmacologic inhibition of NEK2 with JH295 selectively kills EBV-positive NHL cells and induces inflammatory, ROS-associated cell death with gasdermin D cleavage. NEK2 inhibition reduces LMP1 and c-myc expression, decreases ABC transporter expression and MRP1-mediated drug efflux, and sensitizes cells to doxorubicin. In xenograft and cord blood-humanized mouse models JH295 lowered tumor burden, reduced tumor incidence, and prolonged survival without observable toxicity.

Conclusion:
NEK2 is a promising therapeutic target in EBV-positive non-Hodgkin lymphoma; NEK2 inhibition by JH295 both kills malignant cells and reduces drug resistance and viral oncoprotein expression in preclinical models.

Music:
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Article title:
NEK2 drives pathogenesis, drug resistance, and LMP1 expression in EBV-positive non-Hodgkin lymphoma

First author:
White MC

Journal:
PNAS

DOI:
10.1073/pnas.2535550123

Reference:
White MC, Lange PT, Stewart J, Damania B. NEK2 drives pathogenesis, drug resistance, and LMP1 expression in EBV-positive non-Hodgkin lymphoma. Proc Natl Acad Sci U S A. 2026;123:e2535550123. doi:10.1073/pnas.2535550123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/nek2-drives-ebv-positive-nhl

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-16.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript passages on EBV-induced NEK2 upregulation, NEK2 inhibition mechanisms (ROS, gasdermin D), downstream effects (LMP1, c-Myc, beta-catenin, Bcl-2 family), MRP1/ABC transporters and drug resistance, and in vivo xenograft and cord blood–humanized mouse results.
- transcript topics: EBV-induced NEK2 upregulation in primary B cells; EBV latency proteins EBNA1, LMP1, EBNA2 drive NEK2 expression; JH295 NEK2 inhibitor and EBV+ NHL selectivity; Inflammatory cell death: ROS accumulation and gasdermin D cleavage; Downregulation of LMP1, c-Myc, beta-catenin; Bcl-2 family modulation; MRP1/MDR transporters and drug resistance reversal

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- EBV latency proteins EBNA1, LMP1, EBNA2 independently drive NEK2 upregulation
- Primary EBV infection increases NEK2 expression in human B cells
- NEK2 inhibition with JH295 induces inflammatory, ROS-associated cell death with gasdermin D cleavage in EBV-positive NHL
- EBV-positive NHL shows decreased LMP1 and c-myc expression following NEK2 inhibition
- NEK2 inhibition reduces MRP1/MDR transporter expression and activity, decreasing drug efflux and increasing chemosensitivity to doxorubicin
- JH295 reduces tumor burden and increases survival in NKTL xenograft and cord blood–humanized mouse models, with no observable systemic toxicity

QC result: Pass.

Study Highlights:
CSF poly(ADP-ribose) (PAR) is elevated in patients with MCI and AD and negatively correlates with the Aβ42/40 ratio. Oligomeric Aβ1-42 activates PARP1 in primary cortical neurons, causing DNA damage and cell death that are prevented by PARP1 inhibitors or PARP1 genetic deletion. In 5XFAD mice, PARP1 knockout halves plaque burden, preserves synapses and neurons, reduces glial activation and inflammatory gene expression, and rescues spatial learning and memory. Mechanistically, PARP1 deficiency lowers BACE1, alters γ-secretase subunits (PSEN1 up, nicastrin down), and increases the Aβ-degrading enzyme NEP2.

Conclusion:
PARP1 is a critical mediator of Aβ-driven toxicity, amyloid accumulation, neuroinflammation, and cognitive decline in a familial AD model, and its inhibition may be a promising disease-modifying strategy.

Music:
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Article title:
PARP1 deficiency mitigates amyloid pathology, neurodegeneration, and cognitive decline in a familial Alzheimer’s disease model

First author:
Jhaldiyal A

Journal:
PNAS

DOI:
10.1073/pnas.2525028123

Reference:
Jhaldiyal A., Kumari M., Guttman L. C., et al. PARP1 deficiency mitigates amyloid pathology, neurodegeneration, and cognitive decline in a familial Alzheimer’s disease model. PNAS (2026). DOI: 10.1073/pnas.2525028123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/parp1-amyloid-neurodegeneration-5xfad

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-16.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing CSF PAR elevation, Aβ42-induced PARP1 activation in neurons, in vitro neuroprotection by PARP inhibitors, in vivo 5XFAD/PARP1−/− outcomes (plaque burden, neuronal survival, gliosis, cognitive tests), APP metabolism changes, NEP2 involvement, inflammation, and translational cav
- transcript topics: CSF PAR elevation in MCI and AD and relation to Aβ42/40; Oligomeric Aβ42 activates PARP1 and induces DNA damage; Pharmacologic/genetic PARP1 inhibition confers neuroprotection in vitro; 5XFAD/PARP1−/− mice: reduced amyloid plaque burden and neuronal loss; APP processing changes: BACE1 reduction, PSEN1/nicastrin alterations, NEP2 up; Neuroinflammation and gliosis attenuation with PARP1 loss

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- CSF PAR levels are elevated in MCI and AD and inversely correlate with the Aβ42/40 ratio
- Oligomeric Aβ1-42 activates PARP1 and induces DNA damage; PARP1 inhibition or deletion confers neuroprotection in vitro
- PARP1 deficiency in 5XFAD mice reduces plaque burden (~50%) and preserves neurons and synapses while reducing gliosis and neuroinflammation
- PARP1 deficiency lowers APP processing toward reduced Aβ production (BACE1 decreased; PSEN1 up; nicastrin down) and increases NEP2-mediated Aβ degradation
- PARP inhibitors (e.g., veliparib, rucaparib, talazoparib) block Aβ-induced PAR accumulation and protect neurons in culture
- Translational considerations include blood-brain barrier crossing and long-term safety concerns for chronic PARP inhibition

QC result: Pass.

Study Highlights:
Using 200 jaw transcriptomes spanning three East African cichlid radiations, the authors found that alternative splicing (AS) diverged faster than gene expression (GE) and was enriched for craniofacial and jaw morphogenesis genes. Most adaptive isoforms were present at low levels in nonradiating ancestral lineages and increased in frequency in radiating lineages, consistent with standing splice variation fueling rapid adaptation. A subset of novel isoforms evolved rapidly, some within a few thousand years, and mapped to candidate craniofacial genes such as col21a1. Younger radiations (Victoria, Malawi) showed stronger AS divergence while the older Tanganyika radiation displayed more GE differences.

Conclusion:
Ancestral alternative splice variation, supplemented by rapidly evolved novel isoforms, provided a labile reservoir of protein-coding diversity that likely enabled the extremely rapid trophic diversification of African cichlid radiations; integrating splicing into regulatory perspectives is essential to understand rapid adaptive evolution.

Music:
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Article title:
Ancestral splice variation is a key substrate for rapid diversification in African cichlids

First author:
Singh P

Journal:
PNAS

DOI:
10.1073/pnas.2516477123

Reference:
Singh P., Ahi E.P., Duenser A., Durdevic M., Gessl W., Schaeffer S., Gall J., Seehausen O., Sturmbauer C. Ancestral splice variation is a key substrate for rapid diversification in African cichlids. PNAS. 2026;123(20):e2516477123. doi:10.1073/pnas.2516477123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/ancestral-splice-variation-african-cichlids

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-15.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing AS vs GE dynamics, ancestral standing variation, novel isoforms (col21a1), lake-by-lake evolutionary patterns, and convergent/trophic evolution; cross-checked against the original article.
- transcript topics: Adaptive radiation and jaw anatomy in African cichlids; Gene expression vs alternative splicing (GE vs AS); Ancestral standing variation and novel isoforms; Temporal patterns: young vs old radiations (Victoria/Malawi vs Tanganyika); Key genes: col21a1 and craniofacial pathways; Convergent vs divergent regulation across radiations

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Transcript describes AS evolving faster than GE; AS divergence aligns with species/diet and not just tissue.
- Transcript cites ancestral standing variation: 86.0% of genes and 73.0% of isoforms present in riverine ancestors and radiations.
- Transcript notes novel isoforms (34 identified) with col21a1 isoforms linked to hypertrophied lips in Lake Victoria radiants.
- Transcript reports lake-by-lake patterns: Victoria/Malawi rely on AS for rapid jaw divergence; Tanganyika relies more on GE over time.
- Transcript mentions convergent differential expression in multiple lakes (e.g., odam) and convergent trophic evolution.
- Transcript emphasizes a two-phase view: AS provides rapid adaptive changes; GE provides longer-term tuning.

QC result: Pass.

Study Highlights:
BRCA1P1 is expressed broadly across human cancer cell lines and is elevated in breast tumors. The majority of BRCA1P1 transcripts are circular RNAs that bind the NF-κB subunit RelA to attenuate NF-κB–driven antiviral gene transcription. Loss of BRCA1P1 by ASO or CRISPR induces ISGs, IFNβ and TNF, increases apoptosis and sensitivity to chemotherapy, and enhances macrophage phagocytosis. In patient-derived organoids and humanized mouse xenografts BRCA1P1 depletion reduces tumor viability and increases T cell and M1 macrophage infiltration.

Conclusion:
BRCA1P1-derived circular RNAs act as immunosuppressive regulators of antiviral and antitumor immunity in human cancers, and targeting BRCA1P1 activates antiviral programs that reduce tumor growth and boost immune infiltration.

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Article title:
Regulation of antiviral and antitumor immunity by the BRCA1 pseudogene in human cancers

First author:
Han YJ

Journal:
Proceedings of the National Academy of Sciences (PNAS)

DOI:
10.1073/pnas.2528911123

Reference:
Han YJ, Zhang J, Shariff M, Wu S, Khramtsova G, Nguyen LC, Peiffer DS, Li N, Lewicka A, Moore M, Piccirilli JA, Olopade OI. Regulation of antiviral and antitumor immunity by the BRCA1 pseudogene in human cancers. Proc Natl Acad Sci U S A. 2026;123(19):e2528911123. doi:10.1073/pnas.2528911123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/brca1p1-pseudogene-antiviral-immunity

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-15.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing BRCA1P1 background, circular RNA nature, RelA/NF-κB interaction, depletion experiments (ASO/CRISPR), pancancer expression, antiviral gene upregulation, apoptosis, chemotherapy sensitivity, immune infiltration, PDOs, and humanized mouse models, plus clinical implications and de
- transcript topics: BRCA1P1 background and primate-specificity; BRCA1P1 circular RNA and RelA/NF-κB interaction; BRCA1P1 depletion methods (ASO, CRISPR) and pancancer scope; Antiviral gene induction and cytokine responses; Apoptosis and chemotherapy sensitivity after BRCA1P1 loss; Macrophage phagocytosis and T cell infiltration

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- BRCA1P1 is a primate-specific, chimeric BRCA1/RPLP1 pseudogene; majority of BRCA1P1 transcripts are circular RNAs (~70-80%).
- BRCA1P1 circRNA binds RelA (NF-κB p65) and suppresses NF-κB–driven antiviral gene transcription.
- BRCA1P1 depletion (via ASO or CRISPR) increases antiviral ISGs (IFIH1, IFIT3, OAS2) and cytokines (IFNB1, IL1B, TNF) across multiple cancer cell types.
- BRCA1P1 depletion induces apoptosis in cancer cells and increases sensitivity to doxorubicin, with minimal toxicity to nonmalignant cells.
- BRCA1P1 loss enhances macrophage phagocytosis and elevates CD3/CD4/CD8 T cell and CD86+ macrophage infiltration into tumors.
- BRCA1P1 depletion reduces viability of patient-derived organoids and decreases tumor volume in humanized mouse models.

QC result: Pass.

Study Highlights:
CRISPR base editor screens tiled MEN1 and profiled resistance to five clinical menin inhibitors, revealing shared (M327 I/V/T, G331D) and inhibitor-specific (C334R, E368K/V, V372A) substitutions. Co-crystal structures of mutant menin bound to each inhibitor explain resistance via steric clashes or disrupted interactions and correlate with measured Ki and cellular IC50 shifts. Orthogonal in vitro selection and PDX experiments show many predicted mutations arise spontaneously under drug pressure and that higher inhibitor potency or dosing can suppress or overcome some resistant clones. The particular amino acid substitution at a residue critically determines the magnitude and breadth of resistance.

Conclusion:
Enhanced CRISPR base editing combined with structural and biological validation maps a mutational landscape in MEN1 that can produce pan-class or drug-specific resistance to menin inhibitors; these data can guide clinical monitoring, choices between inhibitors, dosing strategies, and next-generation inhibitor design.

Music:
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Article title:
CRISPR base editor screening identifies spectrum of MEN1 mutations impacting menin inhibitors in clinical trials

First author:
Bourgeois

Journal:
Nature Communications

DOI:
10.1038/s41467-026-72685-1

Reference:
Bourgeois, W., Rice, H.E., Wenge, D.V. et al. CRISPR base editor screening identifies spectrum of MEN1 mutations impacting menin inhibitors in clinical trials. Nat Commun (2026). https://doi.org/10.1038/s41467-026-72685-1

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/papercast-base-by-base-menin-mutations-365

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-15.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing the CRISPR base editor screen identifying MEN1 mutations that affect five clinical menin inhibitors, including shared vs inhibitor-specific mutations, biochemical and structural validation, and in vivo PDX confirmation, as well as dose-related resistance dynamics and limitatio
- transcript topics: Menin-KMT2A interaction and menin inhibitors in leukemia; CRISPR base editor screen design and MV4;11 cells; Shared and inhibitor-specific MEN1 mutations (M327, G331, T349, C334R, E368K/V, V372A); Biochemical binding: TR-FRET and Ki shifts; Structural insights: co-crystal structures; In vivo validation: PDX models

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Five inhibitors tested: DS-1594, JNJ-6617, KO-539, SNDX-5613, DSP-5336
- Base editing screen in MV4;11 A>G and C>T lines mutates MEN1 across residues; screen yields enriched residues near the KMT2A binding pocket
- Mutations show shared (pan-class) resistance, notably M327I and G331D, and inhibitor-specific resistance (C334R for DS-1594; E368K/V for DSP-5336; V372A for KO-539)
- Ki shifts measured by TR-FRET correlate with cellular IC50 shifts
- Co-crystal structures explain resistance via steric clashes or disrupted interactions
- In vivo PDX validation shows mutations arise under therapeutic pressure; higher potency can suppress or overcome resistance

QC result: Pass.

Study Highlights:
Using public gene-expression data and fresh whole blood, the authors show C4 protein is primarily localized to neutrophils and monocytes. In a clinical cohort, neutrophil C4 protein positively correlated with C4A gene copy number in schizophrenia (Spearman rho = 0.63). Neutrophil and classical monocyte C4 protein were reduced in schizophrenia versus controls, and neutrophil C4 associated with perceived stress and symptom measures. Findings support a peripheral, cell-associated source of complement activation in schizophrenia.

Conclusion:
Neutrophils are a peripheral cellular reservoir of C4 that links C4A gene copy number to complement protein levels in schizophrenia, implicating innate immune cell mechanisms as potential contributors and targets for disease modification.

Music:
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Article title:
Peripheral complement C4 protein in schizophrenia: Association with gene copy number and immune cell subtypes

First author:
Kalinowski A

Journal:
PNAS

DOI:
10.1073/pnas.2536376123

Reference:
Kalinowski A., Macaubas C., Guo H., et al. Peripheral complement C4 protein in schizophrenia: Association with gene copy number and immune cell subtypes. PNAS. 2026;123(20):e2536376123. doi:10.1073/pnas.2536376123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/peripheral-c4-schizophrenia-neutrophil-link

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-11.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive audit of the transcript’s core scientific narrative: peripheral C4 biology in SZ (cellular localization, genetic associations, plasma vs cellular activation), links to symptoms/stress, and translational implications, with attention to study limitations.
- transcript topics: Innate immunity and C4 in schizophrenia; C4 protein expression in neutrophils and monocytes; C4A gene copy number correlates with neutrophil C4 protein in SZ; Plasma C4 vs cell-associated C4 activation; Clinical associations: perceived stress and PANSS; Limitations and confounds (medication, BMI, sample size)

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- C4 protein is expressed and localized in neutrophils and monocytes (cellular localization, not plasma only)
- C4A gene copy number correlates with neutrophil C4 protein in schizophrenia (Spearman rho ≈ 0.63; P ≈ 0.012)
- In schizophrenia, neutrophil C4 protein is lower than controls after adjustment (BMI or related covariates; notable P-values in exploratory analyses)
- Plasma C4 did not show the same correlations with C4A gene copies, suggesting a non-plasma cellular source
- Neutrophil C4 protein depletion correlates with higher perceived stress (PSS) and PANSS general psychopathology in SZ
- Study limitations include all SZ participants being medicated; replication in medication-naive/first-episode samples is needed

QC result: Pass.

Study Highlights:
The authors modeled cfDNA size profiles as sums of Cauchy–Lorentz distributions with ~10 bp periodicity and applied deconvolution across plasma, saliva, urine, CSF and lymphatic fluid. A distinct ~159 bp component emerged as a pivot between intra- and inter-nucleosomal fragments. Tumor-derived ctDNA shows increased intra-nucleosomal fragmentation entropy and inverse amplitude changes across the 159 bp boundary, whereas phagocytosis-associated shortening increases intra-nucleosomal amplitude without raising entropy. The intra/inter-nucleosomal entropy ratio improved cancer detection performance relative to standard size-ratio metrics across multiple cohorts.

Conclusion:
Size deconvolution using Lorentzian components reveals nucleosomal structure in cfDNA, identifies a 159 bp demarcation between fragmentation regimes, and provides an entropy-based metric that enhances ctDNA detection while separating tumor-associated fragmentation from phagocyte-related signals.

Music:
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Article title:
Cell-free DNA size deconvolution resolves nucleosomal origins and reveals tumor-associated fragmentomic alterations

First author:
Zhou Z

Journal:
Nature Communications

DOI:
10.1038/s41467-026-72925-4

Reference:
Zhou Z, Cooper WN, Cheng Z, et al. Cell-free DNA size deconvolution resolves nucleosomal origins and reveals tumor-associated fragmentomic alterations. Nat Commun (2026). https://doi.org/10.1038/s41467-026-72925-4

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/cfdna-size-deconvolution-nucleosomal-origins

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-09.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive auditing of the transcript's discussion of cfDNA fragmentology, Lorentzian deconvolution, the 159 bp pivot, entropy vs amplitude distinctions, Li-Fraumeni context, phagocytosis vs tumor fragmentation, and diagnostic performance metrics.
- transcript topics: cfDNA fragmentomics basics; Lorentzian size deconvolution and nucleosome structure; 159 bp boundary between intra- and inter-nucleosomal cfDNA; intra-/inter-nucleosomal amplitude and entropy ratios; ctDNA fragmentation entropy as cancer signature; phagocytosis vs tumor-derived fragmentation

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- cfDNA size profiles deconvoluted into Lorentzian components across multiple fluids with ~10 bp periodicity
- a ~159 bp component demarcates intra- vs inter-nucleosomal cfDNA
- intra-nucleosomal fragmentation entropy is elevated in ctDNA; phagocytosis-associated shortening increases amplitude but not entropy
- intra-/inter-nucleosomal entropy ratio improves cancer detection performance (gastric cancer AUC ~0.87; multi-cancer AUC ~0.81–0.85; stage-specific AUCs up to ~0.91)
- radiotherapy and organ transplantation contexts show short-fragment enrichment with amplitude changes but entropy changes are not increased in non-tumor scenarios
- dd-cfDNA analyses show differences in amplitude but not entropy between high vs low donor-derived DNA groups

QC result: Pass.

Study Highlights:
Weighted ensemble simulations of Ancestral, Delta, and Omicron BA.1 spikes show distinct RBD opening landscapes and identify two S1 linkers (N2R and a previously underappreciated antiparallel R2N) that connect the NTD to the RBD. In the Ancestral spike a D614–K854 salt bridge constrains the R2N and must break before RBD opening; D614G abolishes that constraint, increasing local flexibility and enabling communication through both linkers. Delta and Omicron BA.1, both carrying D614G, open faster and use balanced N2R/R2N signaling; Omicron also forms a K856–D568 salt bridge and can adopt a unique “peel” conformation. Hydrogen–deuterium exchange mass spectrometry on VLPs confirms altered dynamics around the 614-proximal region consistent with the simulations.

Conclusion:
Ablation of the D614–K854 salt bridge by D614G relieves local frustration, opens an additional allosteric lane via the R2N linker alongside N2R, and accelerates RBD opening—providing a mechanistic link between the D614G substitution and increased infectivity; Omicron BA.1 further tunes this network with compensatory interactions.

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Article title:
D614G reshapes allosteric networks and opening mechanisms of SARS - CoV - 2 spikes

First author:
Kearns FL

Journal:
PNAS

DOI:
10.1073/pnas.2504793123

Reference:
Kearns FL, Bogetti AT, Calvó-Tusell C, et al. D614G reshapes allosteric networks and opening mechanisms of SARS-CoV-2 spikes. PNAS. 2026;123(19):e2504793123. doi:10.1073/pnas.2504793123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/d614g-reshapes-allosteric-networks

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-09.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the spoken content for alignment with the PNAS article's core findings: D614G reshapes spike allostery, dual N2R/R2N pathways, D614-K854 salt-bridge dynamics, Delta/Omicron opening differences, Omicron peel state, and HDXMS corroboration; plus methodological details (WE/MA binning, glycans, and limitations).
- transcript topics: D614G impact on RBD opening dynamics; Weighted Ensemble simulations (WE) and minimal adaptive binning (MAB); N2R and R2N flexible linkers as allosteric pathways; D614-K854 salt bridge role and congestion; Variant-specific opening pathways: Delta and Omicron; Omicron BA.1 peel state and K856-D568 salt bridge

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- D614G abolishes the D614-K854 salt bridge, increasing local flexibility and accelerating RBD opening via dual N2R and R2N linkers
- Delta and Omicron spikes open faster than ancestral and utilize both N2R and R2N pathways
- Ancestral spike relies mainly on the N2R linker; Delta and Omicron use both linkers for RBD opening
- Omicron BA.1 adopts a peel state with a new K856-D568 salt bridge to restabilize FPPR and enable broader opening
- HDXMS on VLPs shows altered dynamics near the 614 region consistent with simulation predictions; peptides near D614G region demonstrate altered deuterium uptake
- WE simulations with minimal adaptive binning mapped RBD opening across variants; hundreds of microseconds of aggregated time over ~2 months on GPUs

QC result: Pass.

Study Highlights:
The authors applied synthetic protein chemistry to introduce site-specific L-to-D Cα inversions (ChIM) in LCDs of Emerin (EMD) and NEFL. ChIM scans identified discrete enantioselective hotspots—EMD residues ~191–203 and NEFL residues ~22–41—where D substitutions strongly reduce self-association measured by GST pulldown and turbidity assays. Minimal inversions, including single D substitutions, can abrogate EMD self-association, while an all-D mirror-image C-terminal fragment restored activity, implicating backbone geometry and secondary-structure involvement. These results show that polypeptide homochirality and transient structure underpin certain LCD–LCD interactions.

Conclusion:
Cα stereochemistry is a determinant of LCD self-association at specific sequence hotspots, and ChIM provides a positional-resolution chemical approach to identify backbone-constrained elements that mediate oligomerization of disordered domains.

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Article title:
Chiral inversion mutagenesis identifies geometrically constrained residues within self - associating low - complexity domains

First author:
Beckner RL

Journal:
PNAS

DOI:
10.1073/pnas.2535888123

Reference:
Beckner RL, Kim L, Carter C, Walterscheid A, Liszczak G. Chiral inversion mutagenesis identifies geometrically constrained residues within self-associating low-complexity domains. Proc Natl Acad Sci U S A. 2026;123(19):e2535888123. doi:10.1073/pnas.2535888123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/chiral-inversion-lcd-hotspots-361

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-08.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the spoken sections describing: ChIM methodology; Emerin LCD hotspot mapping (188–201) with 3×Pro and 3×D scans; single-residue effects (1×D) and all-D mirror-image rescue; NEFL head domain hotspot (22–41) with 5×D scans; assay descriptions (GST pulldown, turbidity); cross-β/anti-selective interactions; drug-de
- transcript topics: Chiral inversion mutagenesis (ChIM) methodology; Emerin (EMD) LCD self-association hotspot mapping (188–201) with Pro/ D-inversions; NEFL head domain hotspot mapping (22–41) with 5×D inversions; Mutational scan results: 3×D, 1×D, 5×D variants and effects on pulldown/turbidity; Mirror-image (all-D) fragment rescue for Emerin; Assays: GST pulldown and turbidity measurements

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- ChIM identifies enantioselective interaction hotspots in LCD self-association
- Emerin hotspot localized to residues 188–201; 3×Pro insertions disrupt, 3×D inversions within hotspot abrogate pulldown
- Single 1×D inversion reduces turbidity by ~6.4-fold in Emerin
- All-D mirror-image C-terminal fragment restores Emerin LCD self-association
- NEFL head domain hotspot localized to residues 22–41; 5×D inversions yield ~9.1-fold and ~20-fold turbidity reductions (22–30 and 33–41 respectively)
- Outside NEFL hotspot, inversions do not disrupt self-association to the same extent

QC result: Pass.

Study Highlights:
The authors merged global genomic samples (Wright’s F / homozygosity) with curated structural linguistic datasets and estimated local structural entropy per grid cell. Using Bayesian GAMMs that adjust for spatial, phylogenetic, environmental, and sampling confounds, they find that higher excess homozygosity (lower genetic diversity) predicts higher structural linguistic entropy. The genetic predictor outperforms other covariates and the effect is robust across grid resolutions and sensitivity checks, though it varies by region and by specific linguistic features. The pattern supports a model where isolation promotes linguistic diversification while contact and admixture promote homogenization.

Conclusion:
An inverse, regionally variable correlation between local human genetic diversity and structural linguistic diversity suggests isolation-driven hotspots are key windows into the flexibility and evolution of language structure.

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Article title:
An inverse correlation between structural linguistic and human genetic diversity

First author:
Graff A

Journal:
PNAS

DOI:
10.1073/pnas.2526762123

Reference:
Graff A., Ringen E.J., Zakharko T., Stoneking M., Shimizu K.K., Bickel B., Barbieri C. An inverse correlation between structural linguistic and human genetic diversity. Proc. Natl. Acad. Sci. U.S.A. 2026;123(18):e2526762123. doi:10.1073/pnas.2526762123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/inverse-correlation-linguistic-genetic-diversity

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-07.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited sections describing inverse relationship between local genetic diversity and structural linguistic diversity, methods (F coefficient, entropy, geodesic hex grids), magnitude of effects, regional patterns, and study limitations; cross-checks with article content performed.
- transcript topics: Inverse relationship between genetic diversity and linguistic structural diversity; Genetic metric Wright's F and linguistic entropy (normalized Shannon entropy); Geodesic hex grid methodology and grid resolutions (500 km and 300 km); Regional variation and strongest signals (North-Central Asia, Southeast Asia); Feature-level impact and percent of features affected by genetic diversity; Limitations: correlation vs causation and blind spots of genetic data

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 5
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Inverse correlation between local genetic diversity (F) and local structural linguistic diversity (entropy) after adjusting for geography, phylogeny, environment
- F coefficient reflects excess homozygosity, proxy for historical isolation; high F indicates low genetic diversity
- Structural linguistic diversity quantified via normalized Shannon entropy across 333 features in 4,257 languages (TLI dataset) with cross-check in GBI (196 features, 2,467 language
- Two grid resolutions used: 500 km and 300 km; analyses include jittered coordinates as sensitivity checks
- Genetic predictor emerges as strongest correlates of linguistic diversity, outperforming environment and population density in main models
- Magnitude: approximately 2.3% increase in entropy per SD increase in F (500 km grid); about 2.1% in the finer grid (300 km)

QC result: Pass.

Study Highlights:
Researchers used computational design (BindCraft and AlphaFold3) to generate miniprotein inhibitors targeting the PDCoV receptor-binding domain and screened candidates by BLI and pseudovirus neutralization. MB11 binds the PDCoV RBD with KD ~155 pM and neutralizes PDCoV and several distantly related DCoVs with superior potency to known antibodies. Cryo-EM shows MB11 occludes receptor-binding loops and sterically blocks APN engagement, explaining broad neutralization. Deep mutational scanning indicates a high barrier to escape and biochemical tests show MB11 retains function after high temperature and low pH exposure but is susceptible to pepsin.

Conclusion:
MB11 is a promising preclinical PDCoV inhibitor combining ultrapotent, broad neutralization, mechanistic receptor blockade, and favorable stability, supporting further development for pandemic preparedness.

Music:
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Article title:
Computational design of an ultrapotent deltacoronavirus miniprotein inhibitor

First author:
Avery NG

Journal:
PNAS

DOI:
10.1073/pnas.2533456123

Reference:
Avery NG, Yoshiyama CN, Taylor AL, Park Y-J, Asarnow D, Perruzza L, Brown JT, Corti D, Benigni F, Starr TN, Veesler D. Computational design of an ultrapotent deltacoronavirus miniprotein inhibitor. PNAS. 2026;123:e2533456123. doi:10.1073/pnas.2533456123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/mb11-pdcoronavirus-minibinder

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-06.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the sections covering MB11 design (BindCraft/AF3), binding measurements (BLI), neutralization assays (PDCoV and related DCoVs), cryo-EM structural validation, deep mutational scanning escape analysis, biophysical stability tests (heat/acid/enzymes), and delivery/manufacturing implications discussed.
- transcript topics: Computational minibinder design (BindCraft and AlphaFold3); Biolayer interferometry binding screening; Pseudovirus neutralization assays and breadth across DCoVs; Cryo-EM structure and mechanism of entry inhibition; Deep mutational scanning and viral escape barriers; Biophysical stability under heat, low pH, and proteases

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- MB11 has KD ≈ 155 pM to PDCoV RBD (binds with high affinity).
- MB11 neutralizes PDCoV pseudovirus with IC50 ≈ 216 pM.
- MB11 shows broad neutralization across DCoVs, including SparrowCoVISU42824 (IC50 ≈ 14 pM) and MuniaCoVHKU13 (IC50 ≈ 152 nM).
- Cryo-EM reveals MB11 wedges into PDCoV RBD receptor-binding loops, blocking APN engagement; structure at 2.8 Å resolution with AF3 predicted model within ~0.6 Å RMSD.
- Deep mutational scanning shows a high barrier to escape; only a few mutations (at residues such as Y394 and V395) can modestly affect binding without severely compromising APN affi
- MB11 remains functional after heating to 70 °C for 1 h and after exposure to pH 2.2; largely resistant to proteases (except pepsin) and not aggregated after stress.

QC result: Pass.

Study Highlights:
A single infant carried a paternal c.5C>T (p.Ser2Phe) CHCHD4 variant and a maternal deletion encompassing CHCHD4, resulting in markedly reduced CHCHD4 protein and severe lactic acidosis with neurological regression. Fibroblast analyses revealed decreased complex I and IV subunits, assembly defects on BN-PAGE, and widespread downregulation of mitochondrial proteins by proteomics, with respiratory electron transport and complex I biogenesis identified as the main dysregulated pathways. Lentiviral overexpression of wild-type CHCHD4 in patient cells restored CHCHD4 levels, rescued complex I and IV protein abundance and assembly, and reversed many proteomic changes, supporting causality.

Conclusion:
Biallelic CHCHD4 deficiency causes a severe early-onset mitochondrial disease by impairing mitochondrial protein import and assembly of complexes I and IV; restoration of CHCHD4 rescues the molecular defects. Additional cases are needed to define the clinical spectrum and the functional impact of specific variants.

Music:
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Article title:
Biallelic variants in CHCHD4 are associated with combined OXPHOS defect leading to mitochondrial disease

First author:
Mantecon M

Journal:
Human Genetics and Genomics Advances

DOI:
10.1016/j.xhgg.2026.100615

Reference:
Mantecon M, Chhuon C, Roger K, et al. Biallelic variants in CHCHD4 are associated with combined OXPHOS defect leading to mitochondrial disease. Human Genetics and Genomics Advances. 2026;7:100615. doi:10.1016/j.xhgg.2026.100615

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/biallelic-chchd4-oxphos-defect

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-05.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the sections describing CHCHD4 function in the MIA pathway, the pediatric case with biallelic CHCHD4 variants, AlphaFold structural predictions for Ser2Phe, lentiviral complementation rescuing OXPHOS defects, and the proteomics results including selective vulnerability and clinical implications.
- transcript topics: MIA pathway and CHCHD4 function in mitochondrial protein import; Genetic case and inheritance pattern (p.Ser2Phe with maternal CHCHD4 deletion); AlphaFold structural prediction of Ser2Phe destabilizing CHCHD4; Functional complementation rescue with WT CHCHD4 in patient fibroblasts; Proteomics results showing OXPHOS defects and selective vulnerability; Clinical implications: CHCHD4 deficiency as a novel cause of mitochondrial disease

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- CHCHD4 is a component of the mitochondrial import and assembly (MIA) pathway that imports small cysteine-containing substrates and its deficiency impairs import and assembly of oxi
- Subject carried biallelic CHCHD4 variants: paternal Ser2Phe and a maternal CHCHD4 deletion; subject fibroblasts show reduced CHCHD4 and defects in OXPHOS protein levels and assembl
- AlphaFold predicted that Ser2Phe destabilizes CHCHD4 by disrupting a hydrogen-bond zipper near a beta-hairpin, explaining loss of function.
- Functional complementation with wild-type CHCHD4 via lentiviral expression rescues CHCHD4 levels and restores complex I and IV protein abundance and assembly in subject-derived cel
- Proteomics shows broad downregulation of mitochondrial proteins with CHCHD4 deficiency; rescue of CHCHD4 restores many affected proteins; iron-sulfur cluster export pathways largel
- CHCHD4 deficiency is identified as a novel cause of severe mitochondrial disease in humans; the study is limited by a single-case design and calls for additional cases to define na

QC result: Pass.

Study Highlights:
The study combined data from UKB, All of Us, 100kGP, Genes & Health, BioMe, and BBJ totaling 948,690 samples and phased rare variants to detect compound-heterozygous genotypes. Phasing increased the number of bi-allelic damaging genotypes by 19% and identified 5,563 genes with bi-allelic pLoF genotypes. Gene-based recessive testing across 41 traits found 58 significant associations after meta-analysis and Cauchy combination, with 17 instances showing stronger recessive than additive effects, including HBB with heart failure and LECT2 with height. The federated, cross-biobank approach improved power and highlighted the value of diverse ancestries for discovering recessive effects.

Conclusion:
Federated meta-analysis across multiple biobanks combined with statistical phasing substantially increases discovery of rare recessive gene-trait associations and expands the catalog of human gene knockouts, demonstrating the importance of phasing and diverse cohorts for recessive-effect discovery.

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Article title:
Meta-analysis across six global biobanks identifies recessive coding associations with complex traits and diseases

First author:
Lassen F

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.04.005

Reference:
Lassen F.H. et al., 2026. Meta-analysis across six global biobanks identifies recessive coding associations with complex traits and diseases. The American Journal of Human Genetics 113, 1–17. https://doi.org/10.1016/j.ajhg.2026.04.005

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/recessive-coding-associations-six-biobanks

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-03.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections describing: the role of statistical phasing to identify compound-heterozygous genotypes, the scale across six biobanks (~950k individuals), the rise in bi-allelic genotypes, and key recessive gene–trait associations (HBB, LECT2, ENSG00000267561, PYGM, ODAD1), plus pleiotropy and conditional
- transcript topics: Introduction to human knockouts and biobank-scale data; Compound heterozygosity and the need for phasing; Statistical phasing across six biobanks and study scale; Gene-based recessive associations across 41 traits; Notable associations: HBB with heart failure and lipids; LECT2 with height; ENSG00000267561 with height; BTNL9 association with HDL-C and triglycerides

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- PHASED approach increased bi-allelic damaging genotypes by 19% (compound-heterozygous and homozygous) across biobanks
- Identified 5,563 genes harboring bi-allelic genotypes; 1,767 additional genes beyond previous studies; total 8,925 unique genes when accounting for overlaps
- CH variants increased testable genes by 8.9% to 1,253 genes (from 1,151)
- 58 significant gene–trait associations identified; 17 likely recessive (based on comparing recessive vs additive signals)
- Notable recessive associations include HBB with heart failure and lipid traits; LECT2 with height; ENSG00000267561 with height; PYGM with AST; ODAD1 with COPD
- Ancestry-diversity contribution: 1,371 of the new knockouts found in non-European ancestries, concentrated in SAS cohorts

QC result: Pass.

Study Highlights:
A panel of six genetically diverse IDV isolates replicated efficiently in MDCK and A549 cell lines, primary well-differentiated human bronchial epithelial cultures, porcine airway cultures, and precision-cut lung slices. IDV induced markedly reduced IRF activation and lower IFN-λ1 and ISG expression compared to human influenza A virus, indicating limited innate immune sensing. Pretreatment with IFN-β potently restricted IDV replication, showing the virus is sensitive to an established antiviral state. Active surveillance at US swine exhibitions recovered multiple genetically distinct IDV strains spanning several clades.

Conclusion:
IDV readily infects and replicates in human respiratory tissues while limiting innate sensing, supporting intensified surveillance and mechanistic studies to evaluate its zoonotic and pandemic potential.

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Article title:
Efficient replication of influenza D virus in the human airway underscores zoonotic potential

First author:
Sanders CG et al

Journal:
PNAS

DOI:
10.1073/pnas.2530325123

Reference:
Sanders CG et al., Efficient replication of influenza D virus in the human airway underscores zoonotic potential. PNAS (2026) Vol. 123 No. 17 e2530325123. doi:10.1073/pnas.2530325123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/influenza-d-human-airway-zoonotic-potential

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-05-03.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantively audited the transcript sections describing field surveillance, in vitro and tissue-level replication in human/porcine models, innate immune responses, receptor usage, and zoonotic implications as reported in the canonical article.
- transcript topics: Field surveillance and isolation of IDV from exhibition swine; IDV replication in MDCK cells and A549 cells; Primary human and porcine airway epithelial cultures (ALI); Precision-cut lung slices (PCLS) and tissue-level replication; Innate immune sensing and interferon responses (IRF, IFN-λ1, ISGs); Interferon-β pretreatment and antiviral state

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- IDV replicates to high titers in MDCK cells and in immortalized human lung cells (A549).
- IDV replicates efficiently in primary well-differentiated human airway epithelial cultures (ALI) and in porcine ALI cultures, with comparable replication kinetics across species.
- IDV replicates efficiently in human and swine precision-cut lung slices (PCLS).
- IDV elicits markedly weaker interferon signaling and lower IFN-λ1 and ISG induction compared with IAV.
- IDV replication is potently restricted by preactivation of antiviral state with IFN-β.
- Field surveillance at 422 swine exhibitions recovered three genetically distinct IDV strains from swine isolates (panel of six isolates used in downstream analyses).

QC result: Pass.

Study Highlights:
Using a panel of budding yeast mutants, the authors show that acetylation of either Smc3 K112 or K113 is sufficient to produce positioned chromatin loops, while loss of both (Eco1 depletion) leads to expanded, unpositioned loops despite normal cohesin binding. K113 acetylation is required for sister chromatid cohesion (tethering), but cohesion-defective K113R mutants still form positioned loops, indicating looping can occur without tethering. K112 acetyl-mimic reduces loader-stimulated ATPase yet retains wild-type loop architecture, whereas hyper-ATPase mutants convert random loops into more positioned loops. The DE (low-ATPase) mutant produces long, unpositioned loops despite normal cohesin binding and Pds5 recruitment, indicating separable mechanisms downstream of acetylation and Pds5.

Conclusion:
Acetylation and ATPase activity separately tune cohesin's functions: acetylation at Smc3 K112/K113 helps position loops and control ATPase responsiveness, K113 acetylation is essential for tethering, and ATPase level biases cohesin toward random versus positioned loops, supporting active loop extrusion as the primary loop-forming mechanism.

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Article title:
Cohesin acetylation and ATPase activity control cohesion and loop architecture through distinct mechanisms

First author:
Costantino L

Journal:
PNAS

DOI:
10.1073/pnas.2531218123

Reference:
Costantino L, Ye T, Boardman K, Xiang S, Luo J, Mu Y, Ma W, Koshland D. Cohesin acetylation and ATPase activity control cohesion and loop architecture through distinct mechanisms. PNAS. 2026;123(17):e2531218123. doi:10.1073/pnas.2531218123.

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/cohesin-acetylation-atpase-loop-architecture

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-30.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing cohesin functions (loop extrusion and tethering), Eco1-mediated Smc3 acetylation at K112/K113, ATPase regulation by Scc2/Scc4, mutations (K112R, K113R, K112Q, K113Q, DE, TI), Micro-C XL method and CARs, Pds5 involvement, and the active loop extrusion model versus loop capture.
- transcript topics: Cohesin functions: loop extrusion and sister chromatid tethering; Smc3 K112/K113 acetylation and Eco1; ATPase regulation by loader Scc2/Scc4 and acetylation; Mutant analyses: K112R, K113R, K112Q, K113Q, ECO1-AID, TI, DE; Micro-C XL methodology and CARs/positioned loops; Pds5 binding and loop regulation

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Either K112 or K113 acetylation suffices to position loops; Eco1 depletion (both acetylations removed) leads to loop expansion and loss of positioned loops
- K113 acetylation is essential for sister chromatid cohesion; K113R mutants are cohesion-defective but can form positioned loops
- K112 acetylation reduces loader-stimulated ATPase; K112Q partially reduces ATPase; K113Q strongly reduces/abolishes loader stimulation
- Hyper-ATPase mutants (TI) reduce random loops and increase positioned loops; DE mutant (low ATPase) yields long, unpositioned loops despite cohesin binding
- DE mutant shows cohesin binding and Pds5 recruitment similar to wild type, suggesting defects are downstream of Pds5 recruitment
- Three distinct ATPase states are proposed: unacetylated (fully inducible/loop-extruding), K112-acetylated (partially inducible), K113-acetylated (non-inducible/cohesion-promoting)

QC result: Pass.

Study Highlights:
The authors estimate male and female total fertility rates using UN WPP2024 data combined with a regression-based model and demographic standardization. They identify a global crossover in 2024 when female TFRs first exceeded male TFRs and project growing disparities through 2100, especially in East Asia. Key drivers are higher sex ratios at birth, declining mortality, and a narrowing male–female mortality gap, with sex-selective abortion amplifying effects in some countries. The analysis highlights social consequences such as rising male childlessness and offers policy recommendations to mitigate sex imbalances.

Conclusion:
Masculinization of reproductive-age populations has flipped historical fertility patterns so that female TFRs now often exceed male TFRs, a gap expected to widen in many regions and to carry social and policy implications related to childlessness and partnership markets.

Music:
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Article title:
Masculinization of populations reverses sex differences in fertility

First author:
Schubert HA

Journal:
PNAS

DOI:
10.1073/pnas.2533317123

Reference:
Schubert HA, Spoorenberg T, Dudel C, Skirbekk VF. Masculinization of populations reverses sex differences in fertility. Proc Natl Acad Sci U S A. 2026;123:e2533317123. doi:10.1073/pnas.2533317123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/353-masculinization-populations-fertility

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-30.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing historical sex differences in fertility, the 2024 crossover, drivers (birth sex ratio, mortality decline, sex-selective abortion), the age-gap Model 3 estimation approach, regional variations (East Asia vs Sub-Saharan Africa), war shocks, and policy implications.
- transcript topics: Historical fertility gender gaps and denominator effects; Birth sex ratio and sex-selective abortion; Mortality decline and sex mortality gap; Model 3 age-gap estimation of male TFR; Global crossover year 2024 and 2100 projections; Regional variations: East Asia vs Sub-Saharan Africa

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Global crossover year: 2024
- 2100 projection: <10% of countries have higher TFRm
- Three drivers of masculinization: birth sex ratio, mortality declines, sex-selective abortion
- Model 3 (age-gap) best fits male fertility estimation
- Sub-Saharan Africa not crossing before 2100 due to maternal mortality
- War mortality shocks (Guatemala, Rwanda) have lasting demographic effects

QC result: Pass.

Study Highlights:
Using six human stool-derived microbiome samples and six resident E. coli isolates in replicated anaerobic microcosms, the authors measured strain-level and species-level growth across 36 strain-by-microbiome combinations. Growth performance of E. coli strains varied with microbiome context and was constrained by intraspecific competition setting a finite E. coli abundance per microbiome. One microbiome (M6) acidified during cultivation, inhibiting E. coli growth; a Clostridium butyricum isolate from M6 reproduced this acidification when transplanted into other samples. Addition of C. butyricum lowered pH, increased butyrate and decreased acetate/lactate, suppressed E. coli and altered overall community composition.

Conclusion:
Interindividual gut-microbiome variation causes variable ecological interactions that affect colonization by incoming strains, and a single transferable taxon (C. butyricum) can act as an ecological control point by driving acidification and reshaping community growth and metabolites.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Interspecies interaction controls Escherichia coli growth in human gut microbiome samples

First author:
Boumasmoud M

Journal:
PNAS

DOI:
10.1073/pnas.2527793123

Reference:
Boumasmoud M., León-Sampedro R., Beusch V., Benza F., Arnoldini M., Hall A.R. Interspecies interaction controls Escherichia coli growth in human gut microbiome samples. PNAS. 2026;123(17):e2527793123. doi:10.1073/pnas.2527793123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/interspecies-ecoli-growth-microbiome

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-27.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript's discussion of experimental design, key results (strain performance variation, acidification, keystone C. butyricum), and ecological implications; compared to the original article's reported methods, results, and interpretations.
- transcript topics: Experimental design: reciprocal transplant in anaerobic microcosms (M2–M7) with six E. coli strains; Strain-level and species-level growth variation across microbiome samples; Intraspecific competition and microbiome-specific finite E. coli abundance; Acidification as a driver of growth suppression; pH measurements; Clostridium butyricum as a keystone species driving acidification and community shifts; Transplantation of C. butyricum into other microbiomes; effects on butyrate, acetate, lactate

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Six donor microbiome samples (M2–M7) and six focal E. coli strains (S2–S7) tested in 36 strain–microbiome combinations; growth varied by microbiome context
- No average home-field adaptation detected; rank order of strains largely consistent across microbiomes with S3 and S7 often most abundant
- Microbiome sample M6 acidified during incubation (pH ~5.4) and suppressed E. coli growth; neutralization restored growth
- A Clostridium butyricum strain isolated from M6 acidified medium and, when transplanted into other microbiomes, reduced pH and altered fermentation products (increased butyrate, de
- Butyricum transplantation reduced E. coli and total bacterial growth and reshaped community composition
- Butyrate production increased by 14.8 mM on average after C. butyricum inoculation; acetate decreased by ~8.08 mM and lactate by ~6.45 mM

QC result: Pass.

Study Highlights:
The authors trained a domain-adaptive neural network on simulated and ancient DNA to distinguish hard sweeps, soft sweeps, and neutrality across 708 ancient and 99 modern Eurasian genomes. The DANN outperformed standard CNNs under demographic and missing-data misspecification and detected 48 ancient sweeps, including 16 overlapping prior reports and 32 novel candidates. All identified sweeps were classified as hard and, after accounting for misclassification rates, the majority remain best explained by hard sweeps. Fourteen sweeps at genes involved in neuronal, reproductive, pigmentation, and signaling functions persisted across a major admixture event, often retaining the same high-frequency haplotype.

Conclusion:
Domain-adaptive deep learning improves detection of selective sweeps in degraded ancient genomes; hard sweeps were the dominant mode of adaptation in these ancient Eurasian samples and several selective events persisted despite strong admixture, pointing to sustained functional importance of particular loci.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
The persistence and loss of hard selective sweeps amid admixture in ancient Eurasians

First author:
Harris M

Journal:
Proceedings of the National Academy of Sciences (PNAS)

DOI:
10.1073/pnas.2528672123

Reference:
Harris M., Mo Z., Siepel A., Garud N.R. The persistence and loss of hard selective sweeps amid admixture in ancient Eurasians. Proc. Natl. Acad. Sci. U.S.A. 2026;123(17):e2528672123. doi:10.1073/pnas.2528672123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/hard-sweeps-admixture-ancient-eurasians

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-26.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing the DANN method (domain adaptation, GRL, haplotype image inputs), the major results (counts of ancient/modern sweeps, hard sweeps, persistence across admixture), and the highlighted loci (HLA, LCT, OCA2/HERC2, KITLG), plus the discussion of admixture timing (~4.5 kya) and impl
- transcript topics: Domain-adaptive neural networks (DANN) and gradient reversal layer; Ancient DNA data quality and missing data; Hard vs soft sweeps definitions; Sweep detection results (ancient vs modern) and total counts; Admixture event around 4.5 kya and sweep persistence; Loci of interest: HLA, LCT, OCA2/HERC2, KITLG

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 5
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- 708 ancient Eurasian genomes analyzed; 99 modern European genomes used for comparison
- Ancient sweeps detected: 48; modern sweeps detected: 28; total across datasets: 58
- All identified sweeps classified as hard sweeps; estimated hard sweeps exceed soft sweeps (80+%)
- 14 sweeps persisted across a major admixture event (~4.5 thousand years ago)
- Loci repeatedly highlighted among sweeps include HLA, LCT, OCA2/HERC2, KITLG

QC result: Pass.

Study Highlights:
The authors identified an OPA1 NM_015560.2:c.22G>T (p.ala8ser, A8S) variant segregating dominantly in a rhesus colony. Heterozygous macaques showed significant peripapillary RNFL thinning, temporal optic nerve head pallor, and reduced PERG amplitudes consistent with RGC dysfunction. Histology and TEM revealed RGC loss, reduced axonal mitochondrial density, dysmorphic mitochondria, myelin disruption, and OPA1 mislocalization in RNFL axons. The model displays phenotypic variability similar to human ADOA and supports use for preclinical testing of mitochondrial- and gene-targeted therapies.

Conclusion:
A spontaneous OPA1 A8S mutation in rhesus macaques recapitulates key structural, functional, and ultrastructural features of human ADOA, providing a translational NHP model for testing therapies.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Rhesus macaques with an OPA1 mutation demonstrate features of autosomal dominant optic atrophy

First author:
Jaggers TN et al

Journal:
PNAS

DOI:
10.1073/pnas.2509165123

Reference:
Jaggers TN et al., Rhesus macaques with an OPA1 mutation demonstrate features of autosomal dominant optic atrophy. PNAS. 2026;123:e2509165123. https://doi.org/10.1073/pnas.2509165123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/350-opa1-rhesus-adoa

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-25.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive audit of the transcript sections describing the OPA1 A8S mutation, heterozygous phenotype (RNFL thinning, ONH pallor, PERG deficits), ultrastructural mitochondrial defects and OPA1 mislocalization, homozygous cases, and translational therapy implications.
- transcript topics: OPA1 A8S mutation and spontaneous nonhuman primate model; Autosomal dominant optic atrophy (ADOA) in rhesus macaques; RNFL thinning and optic nerve head pallor; PERG dysfunction in OPA1 heterozygotes; Mitochondrial abnormalities and OPA1 mislocalization; TEM findings: dysmorphic mitochondria and axon loss

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 5
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- OPA1 A8S missense mutation identified in rhesus macaques in CNPRC colony
- Mutation is dominant and linked to autosomal dominant inheritance pattern
- Heterozygotes show RNFL thinning and temporal ONH pallor; PERG amplitudes reduced
- OPA1 mislocalization and reduced axonal mitochondrial density observed in retina
- Homozygous OPA1 macaques identified; survive to adulthood and reproduce
- Manual RNFL measurements emphasized due to automated segmentation errors in diseased tissue

QC result: Pass.

Study Highlights:
Pol II incorporates 8‑oxo‑rGTP efficiently opposite dC with kinetics comparable to GTP, whereas incorporation opposite dA is much slower but ~150‑fold more efficient than misincorporation of undamaged rGTP. Extension proceeds rapidly from a 3′‑r8OG:dC pair but is markedly slower from a 3′‑r8OG:dA pair. TFIIS‑stimulated proofreading cleaves r8OG:dC robustly but r8OG:dA is resistant to backtracking and cleavage. Crystal structures reveal 8‑oxo‑rG adopts anti Watson–Crick geometry with dC in the A‑site but flips to syn Hoogsteen geometry with dA, where an interaction with Rpb2 E529 stabilizes a pretranslocation state.

Conclusion:
Oxidation of the nucleotide pool can directly undermine Pol II fidelity by enabling efficient incorporation and differential handling of 8‑oxo‑rGTP, producing transcription‑coupled RNA damage with potential consequences for RNA processing, translation, and disease.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Structural basis of transcription -coupled RNA damage by incorporation of oxidized ribonucleotides

First author:
Hou P

Journal:
PNAS

DOI:
10.1073/pnas.2602266123

Reference:
Hou P, Lee C, Chong J, Oh J, Wang D. Structural basis of transcription-coupled RNA damage by incorporation of oxidized ribonucleotides. PNAS. 2026;123(16):e2602266123. doi:10.1073/pnas.2602266123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/8oxo-rgpt-transcription-rna-damage

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-24.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited sections on background, kinetic experiments, structural determinations, proofreading, translocation mechanics, and disease relevance; aligned with the canonical article.
- transcript topics: Oxidative stress and oxidized ribonucleotides; 8-oxo-rGTP incorporation opposite dC and dA templates; Presteady-state kinetics and incorporation efficiency; Extension after 8-oxo-rGTP incorporation; TFIIS proofreading and backtracking with oxidized nucleotides; Structural basis: A-site anti conformation with dC; syn Hoogsteen with dA; E529 fork loop 2 interaction

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- 8-oxo-rGTP can be efficiently incorporated opposite dC, with efficiency comparable to GTP
- 8-oxo-rGTP opposite dA is misincorporated ~150-fold more efficiently than rGTP misincorporation
- Pol II extends more efficiently from 8-oxo-rG:dC than from 8-oxo-rG:dA
- TFIIS-stimulated cleavage occurs for 8-oxo-rGTP:dC (~70% cleavage after 30 minutes) but is limited for 8-oxo-rGTP:dA (<10%)
- 8-oxo-rGTP binds at the A-site opposite dC in anti conformation; opposite dA it adopts syn conformation forming Hoogsteen pairing
- Syn-8-oxo-rG:dA forms a hydrogen bond with Rpb2 E529 in fork loop 2, stabilizing a pretranslocation state and impeding translocation/backtracking

QC result: Pass.

Study Highlights:
The personalized v96 assay detected residual leukemia in 100% of 30 AML patients at clinical remission, compared with 20% by flow cytometry. Plasma cfDNA was more informative and sensitive than bone marrow DNA and driver mutation assays, with 90% of patients positive at 2 months posttransplant. Higher pretransplant mutant molecule counts correlated with relapse risk, and leukemic burden typically fell only after immunosuppression was discontinued, consistent with a graft-versus-leukemia effect.

Conclusion:
A plasma-based multiplexed assay (v96) enables highly sensitive, noninvasive MRD monitoring in AML patients undergoing transplantation and may inform timing of immunosuppression and posttransplant interventions, though larger studies are needed to confirm clinical utility.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
A plasma - based DNA test for quantification of disease burden in acute myeloid leukemia patients undergoing bone marrow transplantation

First author:
Wang Y et al

Journal:
PNAS

DOI:
10.1073/pnas.2537987123

Reference:
Wang Y et al., A plasma-based DNA test for quantification of disease burden in acute myeloid leukemia patients undergoing bone marrow transplantation. PNAS. 2026;123(16):e2537987123. doi:10.1073/pnas.2537987123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/v96-plasma-ctdna-aml-transplant

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-21.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript’s presentation of the v96 methodology, passenger vs driver mutations, plasma vs marrow MRD detection, relapse prediction, and posttransplant immunosuppression dynamics against the original article.
- transcript topics: v96 workflow and passenger mutation panel; duplex sequencing (SaferSeqS) and error suppression; plasma vs bone marrow cell-free DNA for MRD detection; driver vs passenger mutations for MRD assessment; predictive power for relapse (352-fold difference pre-transplant); graft-versus-leukemia (GvL) dynamics and immunosuppression

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 5
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- v96 assay tracks up to 96 leukemia-specific passenger mutations in plasma cfDNA and detects residual leukemia in all patients at complete remission (CR) by v96, vs 20% by flow cyto
- plasma cfDNA mutant-allele fractions (MAF) are higher than bone marrow DNA (2.9% vs 0.42%) at CR
- pre-transplant plasma mutant molecule counts are 352-fold higher in patients who relapse compared with those who do not relapse
- post-transplant residual disease declines more rapidly after immunosuppressive therapy is discontinued, indicating graft-versus-leukemia (GvL) activity
- v96 detects MRD in 100% of patients prior to transplant, whereas driver mutations detected by SaferSeqS are found in about 48% (10/21) at the same time point; at 2 months posttrans

QC result: Pass.

Study Highlights:
The authors develop an analytic and simulation framework for diffusive spreading on spatially embedded dynamic networks formed by mitochondrial fusion and fission. They identify a connectivity-driven transition from three-dimensional dispersion across transiently interacting clusters (social regime) to low-dimensional transport along largely stationary interconnected tubules (physical regime). The steady-state distribution is determined by competing timescales for cluster filling, encounter, fusion/fission, and material decay. Application to three human cell lines reveals cell-type variability in predicted spreading times, with hyperfused networks limited by intracluster diffusion and fragmented networks limited by encounters.

Conclusion:
Network connectivity and the balance of diffusion, encounter, and fusion/fission timescales quantitatively determine mitochondrial material homogenization, producing distinct scaling regimes with measurable predictions across cell types.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Diffusive spreading across dynamic mitochondrial network architectures

First author:
Holta KB

Journal:
Proceedings of the National Academy of Sciences (PNAS)

DOI:
10.1073/pnas.2523913123

Reference:
Holta KB, Zurita C, Teryoshin L, Lewis SC, Koslover EF. Diffusive spreading across dynamic mitochondrial network architectures. Proc Natl Acad Sci U S A. 2026;123(15):e2523913123. doi:10.1073/pnas.2523913123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/diffusive-spreading-mitochondrial-networks

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-19.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive auditing of the transcript’s representation of the article’s core framework, regimes, timescales, cell-type predictions, modeling approach, and acknowledged limitations, with cross-checks against the original article text and the facts pack.
- transcript topics: Temporal networks framework for diffusion on dynamic mitochondrial networks; Physical vs social mitochondrial network regimes; Four timescales governing diffusion: decay, cluster filling, encounter, fission; Agent-based spherocylindrical model and finite-volume diffusion; Time-resolved imaging and cell-type parameterization (SH-SY5Y, IMR90, U2OS); Predictions of spreading times across cell types

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Connectivity-driven transition between low-dimensional (physical) and three-dimensional (social) network regimes
- Four timescales govern spreading: decay, cluster filling, encounter, and fission
- Spreading times: SH-SY5Y ~6 minutes; IMR90/U2OS ~45 minutes for Dp = 20 μm2/s
- Mobility of mitochondria can bottleneck spreading in fragmented networks
- Active transport increases encounter rates; model primarily assumes diffusion
- Three-cell-line analysis (SH-SY5Y, IMR90, U2OS) used to parameterize the model

QC result: Pass.

Study Highlights:
The authors use equilibrium and nonequilibrium in silico analyses to show palindromic regions increase the likelihood of homodimer and higher-order homomultimer formation. Palindrome binding strength correlates with multimerization propensity, and accessible strong palindromes are enriched in nanos and pgc compared to length-matched Drosophila mRNAs. Out-of-equilibrium calculations indicate initial accessible palindromic interactions can favor homotypic binding despite general heterodimer preference. The framework suggests palindromes could be under evolutionary selection and predicts experimental tests using designed synthetic sequences.

Conclusion:
Palindromic, self-complementary RNA regions provide a generic mechanism for RNA self-recognition and can explain homotypic clustering in germ granules; palindrome content may be under evolutionary selection and can guide experimental tests with synthetic RNAs.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
How do RNA molecules distinguish self from non-self?

First author:
Kimchi O

Journal:
PNAS

DOI:
10.1073/pnas.2603593123

Reference:
Kimchi O, Mitchel K, Pyod AGT, Wingreen NS, Gavis ER. How do RNA molecules distinguish self from non-self? PNAS. 2026;123(15):e2603593123. doi:10.1073/pnas.2603593123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/palindromes-rna-self-recognition

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-19.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript portions describing palindromic self-recognition, equilibrium and nonequilibrium modeling, nanos/pgc enrichment, cross-species considerations, GFP tail experiment, evolutionary implications, clinical and synthetic biology implications, and study limitations.
- transcript topics: Palindromic regions as self-recognition mechanism; Equilibrium vs nonequilibrium RNA interactions; Nanos and pgc palindromes: binding strength and accessibility; GFP tail experiment and cross-context clustering; Evolutionary selection and clinical implications; Limitations of in silico modeling and need for in vitro validation

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Palindromic regions enable self-recognition and drive homotypic clustering via multivalent RNA–RNA interactions
- Nanos and pgc RNAs are enriched for accessible, strongly binding palindromes and cluster with their own type
- Out-of-equilibrium modeling shows nanos and pgc have higher homodimer propensity than typical RNAs
- Deleting palindromes abolishes homotypic bias, illustrating necessity of palindromes
- GFP mRNA with nanos tail forms its own homotypic clusters, validating palindrome-driven self-recognition across sequences
- Palindromes are proposed to be under evolutionary selection; content affects clustering across contexts

QC result: Pass.

Study Highlights:
The authors performed a GWAS of TOPsy speech rhythm scores in ~1,501 individuals of European genetic ancestry and identified 14 loci reaching suggestive significance but no genome-wide significant hits. Gene-based analyses flagged TTLL1 and GP2 among the top genes without Bonferroni significance. Gene-set enrichment showed nominal overlap with songbird Area X vocal-learning gene sets, consistent with evolutionary convergence hypotheses. Polygenic score analyses demonstrated shared genetic influences between prosody perception and both word reading and beat synchronization, while voice-pitch PGS results were weaker.

Conclusion:
Findings provide initial genomic evidence that prosody perception is polygenic and shares genetic architecture with reading and musical rhythm, and they motivate larger, more diverse samples and scalable phenotyping (TOPsy) to validate and extend these results.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Genome-wide investigation of prosody perception: Shared genetic influences between speech rhythm, musical rhythm, and reading traits

First author:
Scartozzi AC

Journal:
Human Genetics and Genomics Advances

DOI:
10.1016/j.xhgg.2026.100581

Reference:
Scartozzi AC, Wang Y, Coleman PL, et al. Genome-wide investigation of prosody perception: Shared genetic influences between speech rhythm, musical rhythm, and reading traits. Human Genetics and Genomics Advances. 2026;7:100581. https://doi.org/10.1016/j.xhgg.2026.100581

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/genes-of-prosody-rhythm-music-reading

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-17.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing: the definition/importance of prosody and speech rhythm; TOPsy test methodology; GWAS results (no genome-wide hits, 14 suggestive loci); top gene signals (TTLL1 and GP2); cross-species birdsong gene-set enrichment (Area X); polygenic score analyses (word reading, beat synchron
- transcript topics: Definition and importance of prosody and speech rhythm; TOPsy remote 28-item test design and phenotyping; Genome-wide association results for TOPsy (n=1501 European ancestry); Gene-based GWAS signals TTLL1 and GP2; Birdsong gene-set enrichment: Area X and cross-species convergence; Polygenic score analyses: word reading and beat synchronization predicting TOPsy

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 5
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- TOPsy is a 28-item remote, auto-scored test for syllable stress (prosody) perception
- GWAS sample size: 1,501 individuals of European ancestry; λ ~ 1.0065
- No genome-wide significant variant; 14 loci reached suggestive significance (p < 5e-6)
- Top gene-based signals include TTLL1 and GP2
- Birdsong gene sets showed enrichment for Area X (Area X overlap) in humans
- Word reading PGS and beat synchronization PGS predicted TOPsy scores; voice pitch variability PGS weaker and not consistently replicated

QC result: Pass.

Study Highlights:
A 2-year-old female with severe pediatric restrictive cardiomyopathy carried a homozygous TNNI3 c.406C>T (p.Arg136*) nonsense variant. Myocardial immunostaining showed approximately 50% reduced TNNI3 protein abundance though truncated protein remained detectable. Electron microscopy revealed myofibrillar disarray, irregular Z bands, indistinct M lines, and mitochondrial hyperplasia. The clinical course was treatment refractory and led to heart transplant at 28 months, implicating variant zygosity and truncation position in phenotype determination.

Conclusion:
Biallelic truncation of TNNI3 (p.Arg136*) can cause severe early-onset pediatric restrictive cardiomyopathy, with reduced but partially stable truncated protein and severe sarcomeric pathology prompting early transplantation.

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Article title:
A homozygous variant in cardiac troponin I3, TNNI3, causes severe pediatric restrictive cardiomyopathy

First author:
Kühnisch J

Journal:
Human Genetics and Genomics Advances 7, 100598 (2026)

DOI:
10.1016/j.xhgg.2026.100598

Reference:
Kühnisch J, Barnett CL, Brendel J, et al. A homozygous variant in cardiac troponin I3, TNNI3, causes severe pediatric restrictive cardiomyopathy. Human Genetics and Genomics Advances. 7:100598. https://doi.org/10.1016/j.xhgg.2026.100598

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/tnni3-arg136-pediatric-rcm

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-17.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript's representation of the genetic case, protein expression, tissue analyses, mechanistic interpretation, and genotype–phenotype implications as described in the article.
- transcript topics: RCM vs DCM distinctions; TNNI3 function in the troponin complex; Case presentation and homozygous TNNI3 variant; DNA sequencing and parental segregation; Protein expression by immunostaining; Ultrastructural TEM findings

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Homozygous TNNI3 nonsense variant c.406C>T (p.Arg136*) identified in the proband.
- Proband presented with severe restrictive cardiomyopathy (RCM) requiring heart transplantation at 28 months.
- TNNI3 protein abundance was reduced by approximately 50%, with detectable truncated protein remaining.
- TEM showed sarcomeric disarray and mitochondrial hyperplasia in explanted heart tissue.
- NMD failed to completely eliminate the truncated transcript due to exon 7 being near the end of the gene.
- Heterozygous parents were clinically healthy carriers, supporting non-penetrance of haploinsufficiency in this context.

QC result: Pass.

Study Highlights:
Using full-genome sequencing and phylogenetics, the authors compare 60 years of FPV evolution with 47 years of CPV evolution and identify vaccine-derived sequences that cluster with early isolates. FPV evolves at roughly one-third the rate of CPV in dogs, while the CPV ancestor is closely related to European FPV-like strains and carries multiple capsid mutations linked to binding the canine transferrin receptor. Live-attenuated FPV vaccines derive from early 1960s isolates and FPV shows little antigenic selection compared to the faster-evolving CPV lineage. These patterns emphasize distinct evolutionary dynamics in reservoir versus new hosts during epidemic emergence.

Conclusion:
A single FPV-related lineage from Europe accumulated multiple capsid changes enabling canine TfR binding and gave rise to the CPV pandemic; thereafter CPV evolved approximately 3–4 times faster in dogs, while FPV in its reservoir hosts showed slow evolution with limited antigenic change and persistent vaccine-derived genomes in databases.

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Article title:
Distinct evolutionary patterns of endemic and emerging parvoviruses and the origin of a new pandemic virus

First author:
López-Astacio RA

Journal:
PNAS

DOI:
10.1073/pnas.2515274123

Reference:
López-Astacio RA, Wasik BR, Lee H, Voorhees IEH, Weichert WS, Adu OF, Goodman LB, Hafenstein SL, Truyen U, Parrish CR. Distinct evolutionary patterns of endemic and emerging parvoviruses and the origin of a new pandemic virus. PNAS. 2026;123(16):e2515274123. doi:10.1073/pnas.2515274123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/feline-to-canine-parvovirus-origins

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-15.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing FPV reservoir, CPV emergence, TfR binding and glycosylation barriers, VP2/other capsid mutations, evolutionary rates, vaccine-derived FPV sequences, antigenic variation, intermediate hosts, and missing ancestral link.
- transcript topics: FPV feline reservoir and CPV emergence; Transferrin receptor binding and canine TfR glycosylation barrier; VP2 mutations and host-range adaptation; Evolutionary rates FPV vs CPV and molecular clock methods; Vaccine-derived FPV sequences and vaccine filtering; Antigenic variation in FPV vs CPV and vaccine efficacy

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- CPV originated from European FPV lineage with host-range mutations enabling canine TfR binding
- CPV substitution rate in dogs is approximately 2.18×10^-4 substitutions/site/year; FPV in cats approximately 5.78×10^-5 substitutions/site/year
- Twelve nonsynonymous and ten synonymous substitutions on the CPV-2 branch; nine nonsynonymous substitutions occurred in VP2, with changes near the threefold spike affecting host ra
- FPV vaccine strains derive from 1960s isolates; many FPV-like sequences in databases are vaccine-derived or recombinant; vaccine-derived sequences can confound analyses
- FPV shows limited antigenic variation; CPV exhibits more antigenic variation, but vaccines remain broadly protective due to polyclonal responses
- Raccoons (and other noncanine hosts) proposed as intermediate hosts that could accumulate mutational combinations before canine adaptation

QC result: Pass.

Study Highlights:
The authors screened nearly 12,000 fragments across T2D- and metabolic trait-associated regions in a pancreatic beta cell model using four MPRA configurations (up/down × SCP1/INS). They found ~6% of fragments show significant promoter bias and ~6% show position bias, with INS-preferring fragments enriched for HNF1 motifs. Targeted motif perturbation MPRA showed HNF1 motif disruption reduced activity specifically in the INS promoter context and in beta cells but not in skeletal muscle, indicating cell-type and promoter-specific regulatory dependencies. The results highlight that MPRA construct design choices materially affect detection and interpretation of regulatory activity.

Conclusion:
Promoter identity and fragment position influence MPRA-detected regulatory activity, and tissue-specific promoters (like INS) can reveal TF-dependent regulatory mechanisms (e.g., HNF1) at T2D-linked noncoding regions.

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Article title:
Using a modular massively parallel reporter assay to discover context-dependent regulatory activity in type 2 diabetes-linked noncoding regions

First author:
Tovar A

Journal:
Human Genetics and Genomics Advances

DOI:
10.1016/j.xhgg.2026.100606

Reference:
Tovar A, Kyono Y, Nishino K, Bose M, Varshney A, Parker SCJ, Kitzman JO. Using a modular massively parallel reporter assay to discover context-dependent regulatory activity in type 2 diabetes-linked noncoding regions. Human Genetics and Genomics Advances (2026). doi: https://doi.org/10.1016/j.xhgg.2026.100606

License:
http://creativecommons.org/licenses/by-nc-nd/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/modular-mpra-t2d-context-dependent-regulation

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-14.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the scientific content describing MPRA design parameters, library size, cell models, promoter/position bias findings, HNF1 motif associations and perturbations, and cross-tissue results as presented in the transcript.
- transcript topics: MPRA design configurations (promoter: INS vs SCP1; position: upstream vs downstream); Library scale and construction (11,656 fragments; ~13,226 sites; 198-bp fragments with adapters); Cell models used (832/13 rat beta-cell line; LHCN-M2 human skeletal muscle cells); Promoter bias findings (INS promoter bias ~73.4%; 698 fragments promoter-biased); Position bias findings (703 fragments showing upstream/downstream bias); Motif enrichment and HNF1A/B associations with INS promoter activity

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license
- episode_title

Factual Items Audited:
- MPRA design configurations: upstream vs downstream relative to INS and SCP1 promoters
- Library size: ~11,656 fragments across 4 configurations (out of ~13,226 targeted sites)
- Cell models: 832/13 rat insulinoma beta cells and LHCN-M2 human skeletal muscle myoblasts
- Promoter bias: 698/11,656 fragments show significant promoter effects; INS bias ~73.4% of promoter-biased fragments
- Position bias: 703/11,656 fragments show significant upstream/downstream bias
- HNF1 motif enrichment among INS-promoter-biased fragments; NKX6.1 also involved

QC result: Pass.

Study Highlights:
The authors triangulate OLS, sibling and twin fixed-effects, and Mendelian randomization (MR) using a 335-SNP polygenic index to estimate returns to schooling in Norwegian population and MoBa samples. OLS estimates an additional year of schooling raises prime-age earnings by about 5.9%, sibling FE by 5.3%, MZ twin FE by 3.3%, and MR by 8.0% (with a Norway-only MR estimate of 9.7%). Life-cycle analyses show negative early-career returns that turn positive around age 27 and grow thereafter. Internal rates of return across models exceed the market interest rate, indicating education is profitable over the life cycle.

Conclusion:
Using genetically informed quasi-experiments, one additional year of schooling causally increases annual earnings (MR ~8%), and education appears to pay off across the life cycle.

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Article title:
Estimating returns to education using the genetic lottery

First author:
Widding-Havneraas T

Journal:
PNAS

DOI:
10.1073/pnas.2537049123

Reference:
Widding-Havneraas T, Demange PA, Zachrisson HD, Borgen N, Ystrom E, Elwert F. Estimating returns to education using the genetic lottery. PNAS. 2026;123(15):e2537049123. https://doi.org/10.1073/pnas.2537049123. Published April 8, 2026.

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/genetic-lottery-returns-to-education

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-13.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive audit focused on the episode’s discussion of methodology, key numerical results, lifecycle interpretation, and robustness checks as presented in the original article.
- transcript topics: Causality vs correlation in education and earnings; Mendelian randomization as a quasi-experiment; 335-SNP polygenic index as educational attainment instrument; Comparison across identification strategies: OLS, sibling, DZ/MZ twins, MR; Compliers and nonshared environments; Life-cycle returns and age-27 crossover

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license
- episode_title
- episode_number
- season

Factual Items Audited:
- MR estimate: 8.0% increase in lifetime earnings per additional year of schooling
- OLS estimate: 5.9% increase per additional year of schooling
- Norway-only MR estimate: 9.7% per additional year
- Internal rate of return (IRR) to schooling: 10.1%
- Crossover age where returns become positive: about age 27
- Women experience higher financial returns to schooling than men

QC result: Pass.

Study Highlights:
The authors mapped eight Ptprd splice variants across brain regions and ages and found neuronal activity induces rapid meB skipping. They identified a 316-bp intronic splicing enhancer (ISE) whose heterozygous deletion reduced meB selection by ~25% and caused broad sensory, motor, social, and emotional deficits. They also identified a 420-bp intronic splicing silencer (ISS) required for activity-dependent meB skipping; deletion of the ISS produced selective impairments in motor learning and remote cued fear memory. These results indicate that the spatiotemporal and activity-dependent AS code of a four–amino-acid microexon sculpts synaptogenic properties and behavioral development.

Conclusion:
Spatiotemporal and activity-dependent alternative splicing of a single four–amino-acid microexon in Ptprd controls the balance of PTPRD splice variants and is essential for normal behavioral development in mice.

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Article title:
Alternative microexon splicing code for a four - amino acid peptide of PTPRD governs behavioral development

First author:
Imai A

Journal:
Proceedings of the National Academy of Sciences (PNAS)

DOI:
10.1073/pnas.2515310123

Reference:
Imai A, Izumi H, Ito N, et al. Alternative microexon splicing code for a four-amino acid peptide of PTPRD governs behavioral development. Proc Natl Acad Sci U S A. 2026;123(15):e2515310123. doi:10.1073/pnas.2515310123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/ptprd-microexon-ep340

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-12.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the scientific narrative in the transcript related to Ptprd microexon meB regulation, the regulatory elements ISE and ISS, bead-coculture experiments, in vivo CRISPR mouse models (ISE and ISS mutations), activity-dependent skipping, and the resulting behavioral and learning/memory phenotypes, as well as the pro
- transcript topics: Ptprd microexon meA3, meA6, meB and eight splice variants; Bead coculture assay to test synaptogenicity and ligand interactions (Shank2, gephyrin, NLGN3); Genetic regulation of meB: intronic splicing enhancer (ISE); Activity-dependent regulation of meB: intronic splicing silencer (ISS); In vivo CRISPR mouse models: Ptprd+/dISE, PtprddISE/dISE, PtprddISS/dISS; Neuronal activity and rapid meB skipping (1 hour after KCl)

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Eight Ptprd splice variants arise from combinations of meA3, meA6, and meB, with region- and age-specific distributions
- An upstream intronic splicing enhancer (ISE) of Ptprd meB regulates inclusion; its deletion reduces meB selection by about 25% with no change to total PTPRD
- An activity-dependent intronic splicing silencer (ISS) regulates meB skipping; deletion increases meB exclusion to near 100% and impairs motor learning and remote fear memory
- Neuronal activity (KCl) rapidly increases meB skipping within 1 hour
- A 50% reduction in total PTPRD with normal splice ratios yields fewer behavioral abnormalities than a 25% shift in splice ratio
- Dysregulation of Ptprd microexons is linked to ASD-like phenotypes and may be therapeutically targetable via splicing ratio modulation

QC result: Pass.

Study Highlights:
The authors develop cxt, an autoregressive transformer that predicts discretized pairwise coalescence times from SFS-weighted mutation windows, framing TMRCA inference as a translation task. Trained on extensive stdpopsim simulations, cxt matches state-of-the-art accuracy in well-specified settings and generalizes to many out-of-sample species with some loss of accuracy. The model produces well-calibrated approximate posteriors, enables rapid GPU inference (millions of predictions in minutes), and can be fine-tuned or adapted for large Ne, missing data, or small sample sizes. Applications to human and Anopheles genomes recover known signals at LCT, HLA, inversion regions, and the Rdl insecticide-resistance locus.

Conclusion:
cxt reframes coalescent inference as a language-modeling problem, providing a fast, scalable, and adaptable tool that learns priors from simulations to infer local TMRCA and aggregate demography while offering uncertainty quantification through approximate posteriors.

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Article title:
Accessible, realistic genome simulation with selection using stdpopsim

First author:
Korfmann K

Journal:
Proceedings of the National Academy of Sciences (PNAS)

DOI:
10.1073/pnas.2518956123

Reference:
Korfmann K., Pope N. S., Meleghy M., Tellier A., Kern A. D. Coalescence and translation: A language model for population genetics. Proc. Natl. Acad. Sci. U.S.A. 2026;123:e2518956123. doi:10.1073/pnas.2518956123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/cxt-language-model-for-population-genetics

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-11.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections describing the cxt model (architecture and next-coalescence prediction), training on stdpopsim, performance benchmarks, generalization to unseen species, empirical data applications (LCT, HLA, Rdl), missing data handling/adapters, and environmental considerations.
- transcript topics: ARG basics and coalescent theory as context; cxt architecture: decoder-only transformer and next-coalescence prediction; input encoding: mutational densities, SFS, rotary embeddings; training data: stdpopsim simulations and catalog breadth; benchmark comparisons: Singer+Polegon and SMC++; generalization to stdpopsim v0.3 and unseen species

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- cxt is a decoder-only transformer that autoregressively predicts local coalescence times (TMRCA) via next-coalescence prediction
- Trained on stdpopsim simulations; generalizes across demographies, including unseen species
- Inference is fast (millions of TMRCAs in minutes) on a single NVIDIA A100 GPU
- cxt yields well-calibrated approximate posteriors for TMRCA
- Compared to Singer+Polegon and SMC++, cxt is competitive and often superior in well-specified/out-of-distribution scenarios
- Empirical data show clear LCT and HLA signals in humans and Rdl dynamics in Anopheles; missing data handling improves robustness

QC result: Pass.

Study Highlights:
Researchers found bi-allelic WDHD1 variants in 17 subjects presenting with intrauterine growth retardation, microcephaly and a spectrum of organ abnormalities including neonatal acute liver failure. Several intronic variants cause aberrant splicing and markedly reduced WDHD1 protein levels in fibroblasts. Subject-derived cells showed slowed replication fork progression, impaired G1-to-S transition, increased spontaneous DNA damage, abnormal nuclear morphology, and elevated premature sister chromatid separation, supporting a role for WDHD1 in replisome stability and cohesion.

Conclusion:
Hypomorphic bi-allelic WDHD1 variants cause an autosomal recessive microcephalic primordial dwarfism spectrum by reducing WDHD1 protein and impairing replication fork stability, genome integrity, and sister chromatid cohesion, establishing WDHD1 as essential for normal human growth and development.

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Article title:
Bi-allelic WDHD1 variants cause microcephalic primordial dwarfism

First author:
Tibbe D

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.03.010

Reference:
Tibbe D., Vogt M.R., Holling T., et al. Bi-allelic WDHD1 variants cause microcephalic primordial dwarfism. The American Journal of Human Genetics. 2026. https://doi.org/10.1016/j.ajhg.2026.03.010

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/wdhd1-microcephalic-primordial-dwarfism

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-10.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript's coverage of WDHD1 function as replisome scaffold; intronic WDHD1 variants and splicing; DNA fiber assay and replication fork dynamics; γH2AX signaling; nuclear morphology; PCS; and liver pathology in MPD.
- transcript topics: WDHD1 as replisome scaffold; intronic WDHD1 variants and splicing; DNA fiber assay and replication fork speed; γH2AX DNA damage signaling; nuclear morphology and lamin B1; premature sister chromatid separation (PCS)

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- 17 subjects from 14 families with bi-allelic WDHD1 variants and MPD spectrum
- intronic WDHD1 variants cause aberrant splicing and markedly reduced WDHD1 protein levels in patient-derived cells
- WDHD1 acts as replisome scaffolding to stabilize replication forks and maintain genome integrity
- replication fork progression is slowed and there is increased spontaneous DNA damage (γH2AX); nuclear morphology is disrupted; PCS increased
- acute liver failure observed in a subset of neonatal subjects; liver vulnerability discussed in the context of replication stress and polyploidization

QC result: Pass.

Study Highlights:
Using CNV calls and linked EHRs in the UK Biobank, the authors tested associations between 54 ND-CNVs and combinations of internalizing and cardiometabolic conditions (ICM-MM). Aggregated ND-CNV carriers (n≈7,546; ~1.6%) had higher odds of ICM-MM (OR range 1.21–1.57) and a higher ICM-MM frequency (14.2% vs 11.5%). Deletions showed stronger effects than duplications and the number of haploinsufficient genes in deletions was associated with greater ICM-MM risk. No robust interactions were detected between ND-CNV status and polygenic risk scores after multiple testing correction.

Conclusion:
ND-CNVs increase risk of internalizing–cardiometabolic multimorbidity at the population level, especially for deletions and in females, suggesting the need for heightened clinical monitoring of carriers.

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Article title:
Neurodevelopmental copy-number variants increase risk of internalizing and cardiometabolic multimorbidity: Findings from the UK Biobank

First author:
Katzourou IK

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.02.021

Reference:
Katzourou IK, LINC consortium, Barroso I, et al. Neurodevelopmental copy-number variants increase risk of internalizing and cardiometabolic multimorbidity: Findings from the UK Biobank. The American Journal of Human Genetics. 2026;113:1–11. https://doi.org/10.1016/j.ajhg.2026.02.021

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/nd-cnv-internalizing-cardiometabolic-multimorbidity

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-08.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections covering ND-CNV–ICM-MM association, UK Biobank design and CNV calling, dosage-sensitivity (haploinsufficient vs triplosensitive), deletion vs duplication effects (notably 16p11.2), sex differences, PRS interaction analyses, and clinical implications including multidisciplinary care and casca
- transcript topics: Definition of ND-CNVs and ICM-MM; UK Biobank cohort size, CNV calling methods (PennCNV); Dosage sensitivity: haploinsufficient vs triplosensitive genes; Deletion vs duplication effects on ICM-MM and obesity; 16p11.2 region emphasis; Sex differences in ND-CNV associations

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- ND-CNVs increase risk of internalizing–cardiometabolic multimorbidity (ICM-MM) in UK Biobank with OR 1.21–1.57 and 14.2% vs 11.5% prevalence
- Deletions show stronger effects than duplications; 16p11.2 region deletions are notable
- The number of haploinsufficient genes within deletions is associated with higher ICM-MM; duplications' triplosensitive genes do not show the same pattern
- No robust ND-CNV × PRS interactions after multiple-testing correction; nominal interactions present in some PRS analyses
- Sex differences: higher risk in females for certain ND-CNV associations (e.g., T2D, internalizing)
- Survival bias in UK Biobank implies observed effect sizes are conservative lower bounds

QC result: Pass.

Study Highlights:
The team enrolled 227 secondary findings recipients and completed genotyping and deep phenotyping for 163 probands, using cascade testing and variant reclassification. They piloted a Bayesian method combining prior population prevalence, variant pathogenicity, and family genotype–phenotype data to estimate clinicomolecular diagnosis (CMD) probabilities for BRCA1/2 families. CMD probabilities varied widely (26.2% to >99.9%) and over half of BRCA1/2 families met NCCN diagnostic testing criteria, indicating underuse of diagnostic testing.

Conclusion:
In opportunistic secondary findings contexts the posterior probability that a patient has the implicated monogenic disease can differ substantially from variant pathogenicity; integrating familial genotypic and phenotypic data via Bayesian methods refines risk estimates and should guide shared decision-making, management strategies, and policy for population genomic screening.

Music:
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Article title:
Measuring disease likelihood in genomic ascertainment

First author:
Sapp JC

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.03.009

Reference:
Sapp JC, Lewis KL, Modlin EW, et al. Measuring disease likelihood in genomic ascertainment. The American Journal of Human Genetics. 2026;113:1–12. doi:10.1016/j.ajhg.2026.03.009

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/measuring-disease-likelihood-genomic-ascertainment

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-07.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections describing the Bayesian CMD approach, the BRCA1/BRCA2 findings, the Family 8334 case, NCCN criteria implications, and study design/limitations.
- transcript topics: ACMG secondary findings context and selection bias; Bayesian probability model for CMD; Cascade testing and family data integration; BRCA1 vs BRCA2 variant distribution and penetrance; NCCN criteria and clinical testing underutilization; Study design and recruitment (163 probands from 41 sources)

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 5
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- CMD probability range across BRCA1/BRCA2 families: 26.2% to 100%
- Baseline posterior probability for BRCA2-related CMD: 58.2%
- Posterior CMD probability for family 8334: 99.2%
- Average CMD probability across BRCA1/BRCA2 families: 86.9%
- BRCA2 variants comprised 83% and BRCA1 17% of BRCA1/BRCA2 findings
- 51% of BRCA1/BRCA2 families met NCCN diagnostic testing criteria

QC result: Pass.

Study Highlights:
The authors generated a high-coverage (~37-fold) autosomal genome from a ~110,000-year-old male Neandertal (D17) from Denisova Cave and dated it to ~110 kya. D17 is more closely related to an older Denisova Neandertal (D5) than to European or other Altai Neandertals and both D5 and D17 contain Denisovan-derived genomic segments. Patterns of homozygosity indicate smaller, more isolated groups in Altai Neandertals compared with later European Neandertals. Estimated FST shows Eastern and Western Neandertals were as genetically differentiated as the most divergent present-day human populations, implying rapid drift under small effective sizes.

Conclusion:
A high-coverage Altai Neandertal genome reveals Denisovan admixture in older eastern Neandertals, small and isolated group sizes in the Altai, and pronounced east–west Neandertal population differentiation exceeding that seen among modern human populations.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
A high-coverage Neandertal genome from the Altai Mountains reveals population structure among Neandertals

First author:
Massilania D

Journal:
PNAS

DOI:
10.1073/pnas.2534576123

Reference:
Massilania D, Peyrégne S, Iasi LN M, de Filippo C, Mafessoni F, Mesab AB, Sümer AP, Swiel Y, Popli D, Silverman S, Boylea MJ, Kozlikind MB, Shunkov MV, Derevianko AP, Higham T, Douka K, Meyer M, Zeberg H, Kelso J, Pääbo S. A high-coverage Neandertal genome from the Altai Mountains reveals population structure among Neandertals. PNAS. 2026;123(13):e2534576123. doi:10.1073/pnas.2534576123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/d17-altai-neandertal-genome-structure

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-05.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive audit focused on the transcript sections describing: specimen, sequencing coverage, population structure, Denisovan admixture, autozygosity and small group sizes, FST differentiation, and dating of D17/D5 lineages, plus migration/replacement dynamics.
- transcript topics: Denisova 17 (D17) DNA extraction and high-coverage genome (~37x); Relationship among Neandertals (D17, D5, Chag8, Vi33.19) and Denisovans; Denisovan introgression into D17 and D5; lack of clear Denisovan signal in Chag8; Autozygosity and small population sizes (<50 individuals) in Eastern Neandertals; Genetic differentiation (FST ~0.30) between Eastern and Western Neandertals; Molecular dating and age estimates for D17 (~110 kya) and Y-chromosome lineage

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- D17 high-coverage Neandertal genome (~37× autosomal coverage)
- D17, D5 show Denisovan introgression; Chag8 shows little to no Denisovan admixture
- D17 shares more derived alleles with D5 than with Vi33.19 or Chag8
- Eastern and Western Neandertals have FST ≈ 0.30, greater differentiation than most modern human pairs
- D17 estimated age ~110 thousand years (autosomal molecular dating)
- D5 ~8,000 years older than D17 in Denisovan introgression timing

QC result: Pass.

Study Highlights:
The authors developed TiMEstamp to infer TE insertion times from multispecies MSAs and to detect contemporaneous 5′ sequences fused to LINE-1. They compiled a large catalog of LINE-1 chimeras (reported >700 events) including known U6/LINE-1 cases and newly identified partners such as tRNA, 28S rRNA, 7SL, Y RNA, Alu elements, and mRNA 5′ transductions. Alu/LINE-1 chimeras (452 events) and 17 mRNA/lncRNA 5′ transductions were characterized with TSDs, EN motifs, and orientation/length patterns. They also show that promoter co-option (e.g., RAP1GDS1 driving a spliced intronic L1PA2) can restore retrotransposition competence.

Conclusion:
Comparative MSA-based timing reveals widespread, recurrent recombination between LINE-1 RNA and diverse cellular RNAs, producing chimeric insertions that have contributed to transposon diversification and provide mechanisms (RNA ligation, template switching, twin priming, promoter co-option) that may influence TE evolution and somatic/germline retrotransposition.

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Article title:
Comparative genomics reveals LINE-1 recombination with diverse RNAs

First author:
Law C-T

Journal:
Cell Genomics

DOI:
10.1016/j.xgen.2026.101165

Reference:
Law C-T and Burns K.H., 2026. Comparative genomics reveals LINE-1 recombination with diverse RNAs. Cell Genomics 6, 101165. https://doi.org/10.1016/j.xgen.2026.101165

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/line1-recombination-diverse-rnas

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-05.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited sections covering the TiMEstamp workflow and data (MSA across mammals), discovery of chimeric LINE-1 insertions (tRNA halves, 28S rRNA, 7SL, Y RNA, 7SK), Alu/LINE-1 chimeras, mRNA/lncRNA 5' transductions (MAP3K13, FHIT), RAP1GDS1 promoter co-option, twin priming and trans-splicing mechanisms, and study limitati
- transcript topics: LINE-1 retrotransposition mechanics (TPRT); TiMEstamp methodology and MSA dating; Chimeric LINE-1 insertions with non-LINE-1 RNAs (tRNA halves, 28S rRNA, 7SL, Y RNA, 7SK RNA); Alu/LINE-1 chimeras and temporal activity; 5′ transductions involving mRNAs/lncRNAs (MAP3K13, FHIT, RAP1GDS1); RAP1GDS1 promoter co-option and transcriptional rescue

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- TiMEstamp uses MSAs across mammals to date LINE-1 insertions and identify contemporaneous adjacencies
- Chimeric LINE-1 insertions involve diverse RNAs including tRNA halves, 28S rRNA, 7SL RNA, Y RNA, and 7SK RNA
- Alu/LINE-1 chimeras total 452 events with EN motifs in many cases and predominantly sense orientation
- 17 chimeric LINE-1 insertions involving protein-coding mRNAs or lncRNAs (e.g., MAP3K13, FHIT) identified; 5′ exons implicated
- RAP1GDS1 intronic L1PA2 co-opted promoter drives LINE-1 transcription/retrotransposition in brain
- Twin priming and trans-splicing signatures observed in chimeric insertions

QC result: Pass.

Study Highlights:
The authors adapted single-stranded library preparation (2-end sequencing) to measure native 5′ (EM5) and 3′ (EM3) end motifs and defined flanking PREM and POEM motifs. Combining size‑stratified PREM, EM5, EM3, and POEM features raised hepatocellular carcinoma (HCC) detection to an AUC of 0.95. Fragmentomics-based methylation analysis of 3′ ends (3′ FRAGMA) improved HCC detection further (AUC 0.97). A novel 4-end sequencing approach captured all four termini of double‑stranded cfDNA, yielding 4‑end motif models with AUC up to 0.98 and revealing coordinated nuclease activity, notably DNASE1L3 involvement.

Conclusion:
Holistic end profiling of cfDNA—integrating native 5′ and 3′ ends, flanking motifs, methylation-informed fragmentomics, and four‑end resolution—enhances cancer detection performance and provides mechanistic insight into coordinated nuclease-mediated fragmentation, warranting larger validation studies.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Holistic determination of ends of cfDNA molecules

First author:
Jiang P

Journal:
Cell Genomics

DOI:
10.1016/j.xgen.2026.101142

Reference:
Jiang P., Ma M.-J. L., Qiao R., et al. Holistic determination of ends of cfDNA molecules. Cell Genomics. 2026;6:101142. doi:10.1016/j.xgen.2026.101142

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/holistic-cfdna-ends-episode-333

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-04.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript’s substantive description of 2-end sequencing (EM5/EM3), PREM/POEM, 3'-FRAGMA, 4-end sequencing, nuclease signatures (DNASE1L3, DNASE1, DFFB), HCC diagnostic performance (AUC values), fragment-size context, and translational limitations as reported in the article.
- transcript topics: 2-end sequencing preserving native ends (EM5/EM3); Pre-end (PREM) and post-end motifs (POEM); 4-end sequencing with stem-loop adapters and PacBio SMRT; 3'-FRAGMA methylation analysis; Nuclease-specific end motifs and coordinated fragmentation (DNASE1L3, DNASE1, DFFB); HCC detection performance and AUC values

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license
- episode_title
- episode_number
- season

Factual Items Audited:
- 2-end sequencing preserves native 5' and 3' ends (EM5/EM3) by omitting end-repair during library prep
- PREM and POEM motifs are defined and analyzed as end-motif neighbors around EM5 and EM3
- 4-end sequencing enables simultaneous assessment of all four termini using stem-loop adapters and PacBio SMRT sequencing
- 3'-FRAGMA shows methylation-associated fragmentation patterns and improves HCC detection (AUC 0.97)
- Combined end-motif analysis across PREM, EM5, EM3, and POEM yields AUC ≈ 0.95 for HCC detection
- DNASE1L3 identified as a major contributor to cfDNA fragmentation; DNASE1L3 knockout mice alter motif frequencies

QC result: Pass.

Study Highlights:
The authors adapted single-stranded library preparation (2-end sequencing) to measure native 5′ (EM5) and 3′ (EM3) end motifs and defined flanking PREM and POEM motifs. Combining size‑stratified PREM, EM5, EM3, and POEM features raised hepatocellular carcinoma (HCC) detection to an AUC of 0.95. Fragmentomics-based methylation analysis of 3′ ends (3′ FRAGMA) improved HCC detection further (AUC 0.97). A novel 4-end sequencing approach captured all four termini of double‑stranded cfDNA, yielding 4‑end motif models with AUC up to 0.98 and revealing coordinated nuclease activity, notably DNASE1L3 involvement.

Conclusion:
Holistic end profiling of cfDNA—integrating native 5′ and 3′ ends, flanking motifs, methylation-informed fragmentomics, and four‑end resolution—enhances cancer detection performance and provides mechanistic insight into coordinated nuclease-mediated fragmentation, warranting larger validation studies.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Holistic determination of ends of cfDNA molecules

First author:
Jiang P

Journal:
Cell Genomics

DOI:
10.1016/j.xgen.2026.101142

Reference:
Jiang P., Ma M.-J. L., Qiao R., et al. Holistic determination of ends of cfDNA molecules. Cell Genomics. 2026;6:101142. doi:10.1016/j.xgen.2026.101142

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/holistic-cfdna-ends-episode-333

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-04.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript’s substantive description of 2-end sequencing (EM5/EM3), PREM/POEM, 3'-FRAGMA, 4-end sequencing, nuclease signatures (DNASE1L3, DNASE1, DFFB), HCC diagnostic performance (AUC values), fragment-size context, and translational limitations as reported in the article.
- transcript topics: 2-end sequencing preserving native ends (EM5/EM3); Pre-end (PREM) and post-end motifs (POEM); 4-end sequencing with stem-loop adapters and PacBio SMRT; 3'-FRAGMA methylation analysis; Nuclease-specific end motifs and coordinated fragmentation (DNASE1L3, DNASE1, DFFB); HCC detection performance and AUC values

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- 2-end sequencing preserves native 5' and 3' ends (EM5/EM3) by omitting end-repair during library prep
- PREM and POEM motifs are defined and analyzed as end-motif neighbors around EM5 and EM3
- 4-end sequencing enables simultaneous assessment of all four termini using stem-loop adapters and PacBio SMRT sequencing
- 3'-FRAGMA shows methylation-associated fragmentation patterns and improves HCC detection (AUC 0.97)
- Combined end-motif analysis across PREM, EM5, EM3, and POEM yields AUC ≈ 0.95 for HCC detection
- DNASE1L3 identified as a major contributor to cfDNA fragmentation; DNASE1L3 knockout mice alter motif frequencies

QC result: Pass.

Study Highlights:
Young fibroblasts under matrix tension mount a strong, synergistic transcriptional response to TGF‑β while aged fibroblasts exhibit blunted or divergent responses. Age-dependent differences in chromatin accessibility, notably at distal regulatory elements, correlate with these transcriptional outcomes. AP‑1 family motifs are highly enriched in TGF‑β- and age-responsive accessible regions and cooperate with age-specific TFs. Inhibiting AP‑1 activity prevents JUNB recruitment to RNA polymerase II and suppresses myofibroblast activation.

Conclusion:
3D chromatin accessibility acts as a dynamic filter of mechanical and biochemical signals during aging; AP‑1 and its regulatory network drive the age-specific chromatin remodeling that permits synergistic tension + TGF‑β responses in young fibroblasts, and AP‑1 inhibition blocks this activation, suggesting a potential therapeutic axis.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Chromatin accessibility regulates age- dependent nuclear mechanotransduction

First author:
Liao Y

Journal:
PNAS

DOI:
10.1073/pnas.2522217123

Reference:
Liao Y, Land M, Gupta R, Yu L, Sornapudi TR, Shivashankar GV. Chromatin accessibility regulates age-dependent nuclear mechanotransduction. PNAS. 2026;123(13):e2522217123. doi:10.1073/pnas.2522217123. Published March 26, 2026.

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/base-by-base-332-chromatin-age-mechanotransduction

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-04-02.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive auditing covered the study’s central mechanistic story: aging as a chromatin-filter for mechanochemical signaling; AP-1 as master regulator; age-specific TF partnerships; the 3D collagen tension model; ATAC-seq/RNA-seq integration; and AP-1 perturbation experiments.
- transcript topics: Aging as chromatin-based signaling filter; 3D collagen gel tension model with glass ring; TGF-β signaling and mechanical tension synergy; AP-1 as master regulator; age-specific partners (JUNB vs HOXB13); ATAC-seq and RNA-seq integration; Perturbation experiments (siJUNB, T-5224, kinase inhibitors)

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Young fibroblasts exhibit synergistic gene expression enhancement to combined mechanical tension and TGF-β; aging cells show a blunted/divergent response
- Quantified transcriptional shifts: 2128 DE genes in young vs 391 DE genes in old under dual stimulation
- AP-1 motifs are enriched in age- and TGF-β-responsive chromatin regions (DACRs)
- AP-1 partner usage is age-dependent: JUNB in young cells, HOXB13 in old cells
- Disruption of AP-1 (siJUNB or T-5224) suppresses TGF-β–mediated induction of α-SMA and COL1A1
- AP-1 recruitment to RNA Pol II is modulated by upstream kinases; JNK/p38/PI3K influence recruitment, ERK affects post-recruitment potency

QC result: Pass.

Study Highlights:
Bi-allelic NDUFA5 variants were found in four individuals from three unrelated families presenting with a variable multisystem phenotype including congenital heart defects, hematological abnormalities, and Leigh-like neurological features. Multi-tissue RNA-seq and RT-PCR revealed aberrant splicing and NMD, while proteomics and BN-PAGE demonstrated reduced NDUFA5 protein, isolated complex I deficiency, and stalled assembly at a Q/P intermediate. CRISPR-Cas9 ndufa5 zebrafish crispants showed developmental delays, locomotor deficits, reduced survival, and epileptiform neural activity, corroborating functional impact.

Conclusion:
Combined clinical, molecular, and animal-model evidence supports that bi-allelic NDUFA5 variants cause a recessive mitochondriopathy with isolated complex I deficiency and variable multisystem involvement; NDUFA5 should be considered in molecular reanalysis of undiagnosed complex I disorders.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Bi-allelic variants in NDUFA5 cause a mitochondriopathy with complex I deficiency

First author:
Tan et al

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.03.003

Reference:
Tan et al., 2026, The American Journal of Human Genetics 113, 1–14, May 7, 2026. https://doi.org/10.1016/j.ajhg.2026.03.003

License:
CC BY (http://creativecommons.org/licenses/by/4.0/)

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/ndufa5-complex-i-mitochondriopathy

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-31.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript portions describing NDUFA5 variants, splicing consequences, proteomics/BN-PAGE findings, zebrafish model outcomes, and the diagnostic paradigm shift.
- transcript topics: Complex I biology and mitochondrial energy metabolism; Gene discovery via GeneMatcher and patient cohorts; NDUFA5 variant classes and their consequences; RNA sequencing and exon skipping due to synonymous variant; Protein abundance and complex I assembly defects; Blue native PAGE and assembly intermediates

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Bi-allelic NDUFA5 variants cause a mitochondrial complex I deficiency with multisystem disease
- Two distinct variant classes observed: frameshift + missense in Family 1; start-loss + synonymous splice variant in Family 2; homozygous synonymous splice variant in Family 3
- RNA-seq reveals aberrant splicing and nonsense-mediated decay for some alleles; exon 3 skipping yields a 39-amino-acid in-frame deletion
- Proteomics shows markedly reduced complex I abundance and undetectable NDUFA5 in affected individuals
- BN-PAGE shows assembly stall at the Q/P intermediately, with accumulation of specific subassemblies
- Zebrafish ndufa5 crispr mutants display developmental defects, locomotor impairment, seizures, and reduced survival

QC result: Pass.

Study Highlights:
The authors developed 5ULTRA to annotate SNVs, indels, and splicing variants that create/disrupt uORFs or alter Kozak strength, integrating comprehensive uORF databases and SpliceAI. A random-forest 5ULTRA score trained on HGMD and gnomAD distinguishes likely translation-impacting variants and achieved strong cross-validation performance and AUC = 0.82 on an independent ClinVar test. The score correlates with cis-pQTL effect sizes (Spearman rho = 0.57) and with MPRA ribosome-load measurements (rho = 0.78). Genome-wide screening found thousands of candidate variants, highlighted rare/conserved signals in disease genes, and nominated examples in cancer, GWAS loci, and rare infections.

Conclusion:
5ULTRA provides a validated, transcript-aware framework to detect and prioritize 5′ UTR variants that modulate translation, offering mechanistic hypotheses for noncoding variant interpretation in rare disease, cancer, and complex-trait genetics; the tool and data are publicly available under a CC BY license.

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-30.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive auditing focused on the scientific content described in the transcript and its alignment with the AJHG article: 5ULTRA architecture, features, SpliceAI integration, validation metrics, somatic/GWAS/infectious disease applications, limitations, and open-source availability.
- transcript topics: 5′ UTR regulatory elements (Kozak motif, uORFs) and translation initiation; 5ULTRA methodology and data integration (MANE transcripts, uORFdb, Ribo-uORF, SpliceAI); Machine-learning scoring (17 features; PhyloP conservation as key predictor; uORF/k Kozak annotations); Model validation (ClinVar, cross-validation AUC, accuracy); Correlation with proteomics and MPRA data (cis-pQTL, ΔMRL); Somatic cancer applications (NRAS and ABI1 examples; splicing effects; N-terminal extensions)

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- 5ULTRA identifes and prioritizes 5′ UTR variants that affect translation via uORFs and Kozak motifs
- 17 features used by the 5ULTRA random forest model; PhyloP conservation of uORF start codon as the strongest predictor
- Genome-wide analysis: ~28 million 5′ UTR variants; ~137k predicted to affect translation via URFs or Kozak changes
- ClinVar independent test AUC ≈ 0.82 and ClinVar threshold-based accuracy ≈ 80.8%
- Cross-validation 5-fold AUC ≈ 0.981; MPRA and pQTL data show concordant translation effects (ΔMRL, Spearman ρ values ~0.78; 5ULTRA vs cis-pQTL ρ ≈ 0.57)

QC result: Pass.

Study Highlights:
The authors built WFmoments and SLiM-based spatiotemporal frameworks and calibrated them with population-scale genomic data from 29 species to model π dynamics after habitat loss. They translated demographic proxies from the IUCN Red List, Living Planet Index, and GBF indicators for 4,611 species to estimate genetic diversity declines. Short-term π loss is often modest, but mid- and long-term losses lag behind habitat declines and can be substantially larger, with average estimates ranging from ~1–13% already lost and mid-term projections much higher under some datasets. Habitat fragmentation can inflate species-wide π while reducing within-population diversity, and recovery of genetic diversity after restoration is slow.

Conclusion:
Habitat protection alone is insufficient to guarantee long-term genetic health; conservation should incorporate genetic monitoring, connectivity restoration, and policies informed by spatiotemporal genetic forecasts.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Large future genetic diversity losses are predicted from conservation indicators even with habitat protection

First author:
Mualim KS

Journal:
Proceedings of the National Academy of Sciences

DOI:
10.1073/pnas.2514371123

Reference:
Mualim KS, Spence JP, Weiß C, Selmoni O, Lin M, Exposito-Alonso M. Large future genetic diversity losses are predicted from conservation indicators even with habitat protection. Proc. Natl. Acad. Sci. U.S.A. 2026. doi:10.1073/pnas.2514371123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/predicting-genetic-diversity-losses-329

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-30.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript’s coverage of the article’s methods (WFmoments, GDAR), habitat-loss scenarios (edge contraction vs fragmentation), key results (short-term vs long-term π losses, wallund/Wahlund effect), real-world examples (Miami Blue Butterfly, Torrey Pine, E. melliodora), and global-scale predictions; excluded
- transcript topics: Genetic diversity concept (π) and proxies; WFmoments framework and GDAR; Edge contraction vs fragmentation habitat-loss patterns; Wahlund/Wahlund-like effects and fragmentation inflation; Spatial population structure (FST) and migration; Empirical calibration: 29 species and 4,611 species predictions

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Short-term π diversity loss after habitat loss is 1–13% (GDAR/π dynamics).
- Long-term π diversity loss lags behind habitat loss and depends on population structure; strongly structured populations show about 27% long-term loss after 50% habitat loss.
- Fragmentation can inflate species-wide π diversity due to the Wahlund effect, with increases up to about 263%.
- Within-population diversity (πlocal) declines under fragmentation, even when species-wide π appears elevated.
- Genetic diversity recovery after habitat restoration is slow and may take thousands to millions of generations; restoration does not rapidly rebuild lost genetic codes.
- Miami Blue Butterfly example predicts mid-term genetic collapse in about 12.5 years (given specific population parameters).

QC result: Pass.

Study Highlights:
The study analyzed circulating haptoglobin (HP) using Fenland protein GWAS summary statistics with LD from UK Biobank, compared four variant selection methods (modified LD‑pruning, COJO, SuSiE, PCA), and extended results with simulations and 15 additional gene regions. In the HP region, incorporating non‑lead variants produced a median proportional gain in R2 of 145.1% and a median reduction in MR standard error of 36.3% relative to the lead variant alone. In simulations with one or two causal variants the methods recovered the expected genetic variance (≈40%) and, when causal variants were removed, non‑lead‑inclusive methods recovered more variance than lead‑only. The functional implication supported by the data is that including correlated non‑lead variants can materially increase instrument strength and precision in cis‑MR, but may raise risks of pleiotropy and numerical instability.

Conclusion:
Variant selection methods that incorporate correlated non‑lead variants reliably improve instrument strength (R2) and MR precision in cis‑MR compared with the lead‑variant‑only approach; comparisons with the lead variant are advised to detect instability.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Variant selection to maximize variance explained in cis-Mendelian randomization

First author:
Zhou A

Journal:
Human Genetics and Genomics Advances

DOI:
10.1016/j.xhgg.2026.100573

Reference:
Zhou A, Karhunen V, Tian H, Pott J, Patel A, Slob EAW, Burgess S. Variant selection to maximize variance explained in cis-Mendelian randomization. Human Genetics and Genomics Advances. 2026 Apr 9;7:100573. https://doi.org/10.1016/j.xhgg.2026.100573.

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/hp-variant-selection-cis-mr

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-27.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing: (1) the four variant selection methods and their rationale; (2) HP region results including R2 gains and SE reductions; (3) simulation studies with known causal variance (40%); (4) extension to 15 gene regions; (5) pleiotropy concerns and safeguards; (6) practical recommendat
- transcript topics: Four variant selection methods (LD-pruning, COJO, SuSiE, PCA); Modified LD-pruning with adjusted R2 and LD-matrix checks; HP region results: variance explained (R2) gains and MR precision; Simulations with known causal variance (40%); Two-causal-variant scenario and lead variant variance explained; Extension to 15 additional gene regions

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Variant selection methods tested: LD-pruning, COJO, SuSiE, and PCA
- HP region results: median proportional gain in R2 of 145.1% and median MR SE reduction of 36.3%
- Simulations recovered about 40% variance explained across methods
- Across 15 gene regions, non-lead variant methods outperformed lead-variant-only approach
- Recommendation to compare multivariant estimates with lead-variant-only baseline
- ABO locus cited as a pleiotropy risk example

QC result: Pass.

Study Highlights:
The study characterized six affected individuals with bi-allelic ATG12 variants using patient fibroblasts, HeLa ATG12 knockout complementation, yeast complementation, and CRISPR zebrafish models. Methods included WES/WGS and Sanger sequencing, immunoblotting, LC3/p62 flux assays, HaloTag-LC3 processing, LDH sequestration, AlphaFold-Multimer structural modeling, yeast GFP-Atg8 assays, and zebrafish behavioral and imaging assays. Structural modeling and biochemical data indicate variants map to ATG12 interfaces with ATG5 and ATG3, destabilize ATG12 or its conjugate with ATG5, reduce LC3/Atg8 lipidation and autophagic flux in a variant-dependent manner. Functionally, ATG12 disruption associates with neurodevelopmental phenotypes including cerebellar vermis hypoplasia, ataxia and seizures in humans, and causes growth, brain-structure and locomotor defects with reduced survival in zebrafish.

Conclusion:
Bi-allelic ATG12 variants impair ATG12 function and autophagy, producing a recessive neurodevelopmental disorder marked by cerebellar vermis hypoplasia and neurological deficits.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Bi-allelic ATG12 variants impair autophagy and cause a neurodevelopmental disorder

First author:
Lambton J

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.03.002

Reference:
Lambton J, Asano S, Huang Y, Suomi F, Eguchi T, Petree C, Huang K, Prigent M, Imam A, McCorvie TJ, Warren D, Hobson E, McCullagh H, Misceo D, Bjerre A, Smeland MF, Klingenberg C, Frengen E, Naik S, Ryan G, Sudarsanam A, Foster K, Vasudevan P, Samanta R, Rahman F, Maqbool S, Udani V, Efthymiou S, Houlden H, McFarland R, Collier JJ, Maroofian R, Yue WW, Varshney GK, Klionsky DJ, Legouis R, McWilliams TG, Mizushima N, Oláhová M, Alston CL, Taylor RW. Bi-allelic ATG12 variants impair autophagy and cause a neurodevelopmental disorder. The American Journal of Human Genetics. 2026 May 7;113:1–18. https://doi.org/10.1016/j.ajhg.2026.03.002

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/biallelic-atg12-autophagy-disorder

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-27.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited substantive scientific content from the transcript, focusing on the patient cohort, molecular mechanism (ATG12-ATG5 conjugation, LC3 lipidation), structural modeling, model organisms (yeast, zebrafish), and neurological phenotype.
- transcript topics: Bi-allelic ATG12 variants and patient cohort; ATG12-ATG5 conjugation and LC3 lipidation; AlphaFold/structural modeling of ATG12 interactions; Yeast and zebrafish functional assays; Cerebellar involvement and mitophagy; Therapeutic implications of autophagy modulation

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Six individuals from five unrelated families with bi-allelic ATG12 variants were described.
- ATG12-ATG5 conjugate loss was observed in one family (S2) and an intact conjugate in another (S3).
- Autophagy flux was altered in subject-derived cells under starvation conditions.
- Zebrafish atg12 knockout showed developmental delay, brain defects, reduced locomotion, and pre-adult lethality.
- Yeast complementation showed hypomorphic, partial-function ATG12 variants; AlphaFold-Multimer modeling placed variants near ATG12 interfaces with ATG5/ATG3.
- Cerebellar vermis hypoplasia and related neurodevelopmental phenotypes were highlighted as key clinical features.

QC result: Pass.

Study Highlights:
Using C. elegans germline as a developmental timecourse model, the authors combined cytological analyses (immunofluorescence, FISH, RAD-51/MSH-5/COSA-1 staining), temporally controlled auxin-inducible degron (AID) depletion, and TurboID proximity labeling with LC–MS to probe DUO-1 function. Loss or acute depletion of DUO-1 impairs SC assembly, leads to progressive axis/SC instability, depletion of REC-8 cohesin from chromosomes, hyperaccumulation of RAD-51-marked early DSB repair intermediates, and premature sister-chromatid separation. TurboID identifies PARG-1 and cohesin/HORMAD components as proximal partners and DUO-1::GFP localizes to nucleoplasm and a subset of chromosome axes, most prominently in late pachytene/early diplotene. Temporal AID experiments show DUO-1 is required continuously for early SC assembly, late-pachytene SC maintenance, and rapid preservation of diakinesis chromosome compaction, implying an active maintenance role for DUO-1 in preserving chromosome architecture during meiotic prophase.

Conclusion:
DUO-1 is continuously required throughout meiotic prophase in C. elegans to promote assembly and maintain stability of chromosome axes and synaptonemal complexes, protect REC-8 cohesin distribution, limit accumulation of early DSB repair intermediates, and ensure late-prophase chromosome compaction.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Active maintenance of meiosis-specific chromosome structures in Caenorhabditis elegans by the deubiquitinase DUO-1

First author:
Strand LG

Journal:
Proc. Natl. Acad. Sci. U.S.A

DOI:
10.1073/pnas.2532671123

Reference:
Strand LG, Choi CP, McCoy S, Nsamba ET, Silva N, Villeneuve AM. Active maintenance of meiosis-specific chromosome structures in Caenorhabditis elegans by the deubiquitinase DUO-1. Proc. Natl. Acad. Sci. U.S.A. 2026;123(12):e2532671123. https://doi.org/10.1073/pnas.2532671123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/duo-1-c-elegans-meiosis

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-25.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the spoken scientific content reflecting the paper's core findings: DUO-1’s continuous maintenance of meiosis-specific chromosome structures, SC/axis stability, REC-8 cohesin protection, RAD-51 dynamics, AID-time course revealing separable roles, and the DUO-1–PARG-1 interaction revealed by TurboID.
- transcript topics: Meiotic prophase architecture (SC/axis) and DUO-1 roles; Duo-1 mutant phenotypes: SC assembly failure and polycomplexes; REC-8 cohesin distribution and sister chromatid cohesion; RAD-51 dynamics and SPO-11 dependency; COSA-1 foci and recombination intermediates; Auxin-inducible degradation (AID) reveals separable roles in assembly, maintenance, and compaction

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- DUO-1 is continually required throughout meiotic prophase to promote axis/SC assembly, maintain axis/SC stability, and promote/maintain chromosome compaction by the end of prophase
- Duo-1 mutants show impaired SC assembly and polycomplex formation; REC-8 cohesin distribution is lost as SCs disassemble
- RAD-51 foci hyperaccumulate in duo-1 mutants in a SPO-11–dependent manner
- Auxin-inducible degradation (AID) of DUO-1 reveals separable roles in SC assembly (early prophase), maintenance (late pachytene), and chromosomal compaction (diakinesis)
- TurboID proximity labeling identifies DUO-1 near PARG-1 and axis components; PARG-1 localization is impaired in duo-1 mutants but enzymatic activity persists and PAR does not accum
- DUO-1 is a deubiquitinase that protects cohesin/axis components from ubiquitin-mediated turnover

QC result: Pass.

Study Highlights:
The study analyzes 13 human GTEx tissues and identifies clusters of co-expressed neighboring genes, then applies PCA to cluster expression and maps cis-principal-component QTLs (pcQTLs). pcQTL discovery and fine-mapping used SuSiE and TensorQTL permutation-based FDR to identify an average of ~1,396 pcQTLs per tissue, ~27% of which were not found by single-gene eQTL mapping. pcQTLs tend to represent smaller effects distributed across multiple genes in a cluster and often colocalize with GWAS hits missed by single-gene methods. Functionally, pcQTLs increased GWAS colocalizations by 33%, highlighting multi-gene regulatory proxitropy as a source of complex-trait-associated variation.

Conclusion:
Cis-multi-gene pcQTL mapping uncovers novel regulatory loci and increases GWAS colocalizations compared with single-gene analyses, demonstrating that multi-gene approaches improve detection and interpretation of complex-trait-associated variants.

Music:
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Article title:
Focus on single-gene effects limits discovery and interpretation of complex-trait-associated variants

First author:
Lawrence

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.02.022

Reference:
Lawrence, K.A., Gjorgjieva, T., Nachun, D., and Montgomery, S.B. (2026). Focus on single-gene effects limits discovery and interpretation of complex-trait-associated variants. The American Journal of Human Genetics 113, 1–10. https://doi.org/10.1016/j.ajhg.2026.02.022

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/cis-pcqtl-allelic-proxitropy-gtex

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-24.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections presenting the conceptual shift to neighborhood gene regulation (allelic proxytropy), the cis-pcQTL (pcQTL) methodology, GTEx tissue clustering, key quantitative results (novel pcQTLs, clusters, colocalizations), and concrete examples (HOXB cluster, IL-18 receptor genes), plus discussion
- transcript topics: Conceptual shift to gene neighborhoods and allelic proxytropy; cis-pcQTL (pcQTL) methodology and PCA-based signal extraction; GTEx tissue clusters and gene-neighborhood calling; pcQTL discovery statistics (clusters, pcQTLs per tissue, novel signals); pcQTLs and GWAS colocalizations; HOXB cluster example (HOXB3 vs HOXB4) and PC4

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- pcQTLs reveal novel multi-gene regulatory variants missed by single-gene eQTLs
- average pcQTLs per tissue is 1,396
- 27% of pcQTL signals are novel (4,859 pcQTLs)
- pcQTLs increase GWAS colocalizations by 33% vs single-gene QTLs
- HOXB cluster PC4 captures inverse variation between HOXB3 and HOXB4
- IL-18 receptor cluster (IL18RAP/IL18R1) pcQTL colocalizes with eczema, dermatitis, IBD

QC result: Pass.

Study Highlights:
Using purified human proteins and cellular assays, the authors combined cryo-EM (3.1 Å), in vitro ubiquitylation, co-immunoprecipitation and sRNA-seq to dissect TDMD. Cryo-EM shows a dimeric ZSWIM8 that forms an asymmetric clamp around AGO2–miR-7–CYRANO, engaging the MID, N and PAZ domains and embracing trigger RNA flanks. Biochemical reconstitution demonstrates that ZSWIM8–CUL3 together with ARIH1 polyubiquitylates surface lysines of AGO only when the miRNA is paired to a trigger that vacates the PAZ pocket and imposes a specific RNA trajectory. Functionally, these multivalent RNA–RNA, RNA–protein and protein–protein interactions establish a two-RNA-factor authentication mechanism that explains TDMD selectivity and indicates ZSWIM8 can destabilize extensively trimmed miRNAs.

Conclusion:
ZSWIM8–CUL3 recognizes a trigger-induced AGO–miRNA conformation via multivalent interactions—including sensing a vacated PAZ pocket and flanking trigger RNA—to direct ARIH1-dependent polyubiquitylation of AGO and execute TDMD.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
The E3 ubiquitin ligase mechanism specifying targeted microRNA degradation

First author:
Farnung J

Journal:
Nature

DOI:
10.1038/s41586-026-10232-0

Reference:
Farnung J., Slobodyanyuk E., Wang P.Y., Blodgett L.W., Lin D.H., von Gronau S., Schulman B.A. & Bartel D.P. The E3 ubiquitin ligase mechanism specifying targeted microRNA degradation. Nature (2026). https://doi.org/10.1038/s41586-026-10232-0

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/zswim8-cul3-tdmd-structure

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-23.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript portions describing TDMD mechanism, ZSWIM8–CUL3 E3 ligase architecture, AGO2–miRNA–trigger complex recognition, CYRANO/HSUR1 triggers, RNA flanking regions and RBEs, PAZ-pocket vacancy, dimeric clamp, and broader biological implications.
- transcript topics: TDMD overview and cellular context; ZSWIM8–CUL3 E3 ligase architecture and dimer clamp; AGO2–miRNA–trigger complex recognition by ZSWIM8; Trigger RNAs (CYRANO, HSUR1) and pairing architecture; RNA flanking regions and RBEs in ZSWIM8 binding; PAZ pocket vacancy and RNA trajectory

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- TDMD is mediated by ZSWIM8–CUL3 E3 ligase polyubiquitylating AGO2–miRNA in the presence of a trigger RNA
- ZSWIM8 preferentially binds AGO–miRNA–trigger ternaries over AGO–miRNA–seed-only complexes
- ZSWIM8 operates as a dimer that clamps around the AGO2–miR-7–CYRANO complex
- Trigger RNA-induced conformational changes expose an unoccupied PAZ pocket that is recognized by ZSWIM8
- RNA flanking regions and RBEs contribute to ZSWIM8 recognition and binding efficiency
- Two-RNA-factor authentication model: miRNA as password, trigger RNA as phone ping

QC result: Pass.

Study Highlights:
Using the Swedish National Study on Aging and Care–Kungsholmen (SNAC-K) cohort of older adults and repeated validated food-frequency questionnaires, the authors applied panel data analyses with linear regression for cognitive trajectories and Fine and Gray models for dementia incidence. Higher total meat consumption (top vs bottom quintile) in APOE ε3/ε4 and ε4/ε4 participants was associated with better 10-year global cognitive trajectories (β = 0.32) and lower dementia risk (sHR = 0.45). The processed-to-total meat ratio was associated with higher dementia risk (sHR = 1.14) without APOE interaction. Post hoc vitamin B12 analyses suggested APOE-specific differences in nutrient uptake that could help explain the genotype-specific associations.

Conclusion:
Higher meat consumption was associated with slower cognitive decline and reduced dementia incidence among APOE ε3/ε4 and ε4/ε4 carriers, such that the expected excess risk in these genotypes was not observed at high intake levels.

Music:
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Article title:
Meat Consumption and Cognitive Health by APOE Genotype

First author:
Norgren J

Journal:
JAMA Network Open

DOI:
10.1001/jamanetworkopen.2026.6489

Reference:
Norgren J, Carballo-Casla A, Grande G, et al. Meat Consumption and Cognitive Health by APOE Genotype. JAMA Network Open. 2026;9(3):e266489. https://doi.org/10.1001/jamanetworkopen.2026.6489

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/meat-apoe34-44-cognition

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-22.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript’s representation of the paper’s core scientific claims: APOE4 carriers (APOE34/44) show cognitive benefits and reduced dementia risk with higher meat intake; non-APOE34/44 show no such association; processed meat increases dementia risk; unprocessed meat associates with lower mortality in APOE34/
- transcript topics: APOE gene and Alzheimer's risk; APOE4 vs APOE3/2 evolution and dietary adaptation; SNAC-K cohort design, dietary assessment, and cognitive outcomes; Total meat intake and cognitive trajectories by APOE genotype; Dementia incidence by APOE genotype and meat quintiles; Processed-to-total meat ratio and dementia risk

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- APOE34/44 carriers show improved cognitive trajectories and reduced dementia risk with higher meat intake (top quintile) compared with bottom quintile.
- Cognition and dementia benefits for APOE34/44 are quantified as β = 0.32 (P = .01) and sHR = 0.45 (P = .04) respectively.
- No cognitive or dementia associations with meat intake in non-APOE34/44 genotypes (APOE22/23/24/33).
- A higher processed-to-total meat ratio is unfavorably associated with dementia (sHR = 1.14; P = .04) with no APOE interaction.
- Post hoc analyses: unprocessed meat linked to lower all-cause mortality in APOE34/44 (HR = 0.85; P = .04; P for interaction = .03).
- Vitamin B12 absorption differences via food matrix proposed as a mechanism; APOE4 may absorb more from meat matrix than from other sources.

QC result: Pass.

Study Highlights:
In human infants with early-onset diabetes and immune dysregulation, the authors used genome sequencing, RNA-seq, DNA methylation deconvolution, WGCNA, Sanger sequencing, and flow cytometry to define a genetic syndrome. They identified 19 individuals with bi-allelic RNU6ATAC or RNU4ATAC variants and RNA-seq revealed significant U12 intron retention in 274 genes, 94% of which are known U12-intron-containing genes. Multi-omic analyses and targeted immune profiling showed reduced naive B cells and abnormal B cell maturation. Half of tested individuals were GADA-positive, supporting an autoimmune mechanism for the diabetes in these snRNA spliceosome disorders.

Conclusion:
Bi-allelic pathogenic variants in RNU6ATAC cause early-onset autoimmune diabetes with immune dysregulation and bi-allelic RNU4ATAC variants extend RNU4ATAC-opathy to include infancy-onset autoimmune diabetes.

Music:
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Article title:
Bi-allelic variants in the non-protein-coding minor spliceosome components RNU6ATAC and RNU4ATAC cause syndromic monogenic autoimmune diabetes

First author:
Johnson MB

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.02.017

Reference:
Johnson MB, Russ-Silsby J, Blair PA, Govier M, Bonfield G, Domingo-Vila C, EXE-T1D consortium, ATAC clinical consortium, Wakeling MN, Oram RA, Flanagan SE, Tree TIM, Patel KA, Hattersley AT, De Franco E. Bi-allelic variants in the non-protein-coding minor spliceosome components RNU6ATAC and RNU4ATAC cause syndromic monogenic autoimmune diabetes. The American Journal of Human Genetics. 2026 Apr 2;113:1–11. https://doi.org/10.1016/j.ajhg.2026.02.017

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/rnu6atac-rnu4atac-minor-spliceosome

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-22.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript portions describing (a) minor spliceosome biology and snRNA function, (b) genetic findings in RNU6ATAC and RNU4ATAC, (c) U12 intron retention as a shared mechanism, (d) B cell development impairment and multi-omic immune profiling, (e) autoimmunity evidence (GADA positivity), (f) clinical phenoty
- transcript topics: Minor spliceosome biology and U12 introns; RNU6ATAC bi-allelic variants; RNU4ATAC bi-allelic variants and interaction with RNU6ATAC; RNA-seq intron retention in U12 genes; B cell development and maturation defects; Islet autoantibody positivity in early-onset diabetes

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- 19 individuals from 16 families with bi-allelic variants in RNU6ATAC or RNU4ATAC
- RNA-seq shows U12 intron retention in 274 genes (274/258 known U12 genes; 94% overlap with IAOD)
- 50% of tested individuals were GADA-positive
- Reduced naive B cells and impaired B cell maturation validated by DNA methylation deconvolution and flow cytometry
- Infancy-onset insulin-dependent diabetes (median onset ~17–20 weeks)

QC result: Pass.

Study Highlights:
The team analysed Ryugu aggregate samples A0480 and C0370 and the Orgueil meteorite using water and HCl extraction followed by HPLC/ESI-HRMS, CE-HRMS and nano-EA/IRMS. They identified all five canonical nucleobases and measured total nucleobase concentrations (C0370 = 1,577 pmol g−1) and purine-to-pyrimidine (Pu/Py) ratios of ~1.1–1.2 in Ryugu contrasted with 0.099 in Orgueil and 3.4 in Murchison. A strong negative correlation (R2=0.89) between Pu/Py ratios and ammonia across Ryugu, Bennu and Orgueil implies ammonia availability influenced nucleobase formation pathways. The results support widespread abiotic nucleobase synthesis in carbonaceous parent bodies and potential delivery of diverse prebiotic molecules to early Earth.

Conclusion:
All five canonical nucleobases are present in Ryugu samples and their purine-to-pyrimidine distributions, which correlate with ammonia, indicate shared but environment-dependent formation pathways on carbonaceous parent bodies.

Music:
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Article title:
A complete set of canonical nucleobases in the carbonaceous asteroid (162173) Ryugu

First author:
Koga T

Journal:
Nature Astronomy

DOI:
10.1038/s41550-026-02791-z

Reference:
Koga T., Ogawa N. O., Ohkouchi N., Oba Y., Takano Y., Naraoka H., Sasaki K., Sato H., Yoshimura T. et al. A complete set of canonical nucleobases in the carbonaceous asteroid (162173) Ryugu. Nature Astronomy (2026). https://doi.org/10.1038/s41550-026-02791-z

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/ryugu-nucleobases-ammonia-correlation

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-20.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections presenting nucleobase detection, extraction/analytical workflow, concentration data for Ryugu samples, Pu/Py ratios across samples, ammonia correlation, abiotic/isomer evidence (6-methyluracil, hypoxanthine isomer), Chargaff's rule discussion, isotopic signatures, contamination controls, and
- transcript topics: Detection of all five canonical nucleobases in Ryugu; Sequential extraction workflow (water then HCl) and analytical methods (HPLC/ESI-HRMS, CE-HRMS, nano-EA/IRMS); Concentrations of nucleobases in Ryugu samples A0480 and C0370; comparison to Orgueil; Pu/Py (purine/pyrimidine) ratios across Ryugu, Bennu, Orgueil, and Murchison; Correlation between Pu/Py ratios and ammonia concentrations; Evidence for abiotic nucleobase formation: non-biological isomers (6-methyluracil) and hypoxanthine isomer

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- All five canonical nucleobases detected in Ryugu samples A0480 and C0370 (adenine, guanine, cytosine, thymine, uracil).
- Total nucleobase concentration in C0370: 1577 ± 35 pmol g−1; in A0480: 507 ± 21 pmol g−1.
- Pu/Py ratios: Ryugu A0480 ≈ 1.1–1.2; Ryugu C0370 ≈ 1.1–1.2; Orgueil ≈ 0.099; Bennu ≈ 0.55; Murchison ≈ 3.4.
- Pu/Py ratio negatively correlates with ammonia across Ryugu, Bennu, Orgueil (R2 ≈ 0.89).
- Detection of non-biological isomers (e.g., 6-methyluracil) and an hypoxanthine isomer.
- Isotopic signatures show heavy isotopes (δ13C and δ15N) in soluble components, supporting a space origin.

QC result: Pass.

Study Highlights:
The study analyzed cytokine production after ex vivo stimulation in two human cohorts (Tanzania 300TZFG and Dutch 500FG) using sex-stratified cytokine QTL mapping with linear models adjusted for cell counts and covariates. Genotyping, imputation, ELISA cytokine assays, colocalization (coloc) and SNP×sex interaction tests were applied to test sex-specific genetic effects. The authors report twelve genome-wide significant cQTLs in the Tanzanian cohort (seven male-specific, five female-specific) and twelve in the Dutch cohort with multiple sex-specific loci, highlighting TOX-associated IFN-γ regulation in males and EGFR-linked IL-10 regulation in females. These sex-specific autosomal effects altered which associations were detectable in pooled analyses, implying implications for sex-aware precision approaches to immune-related diseases.

Conclusion:
Sex-stratified autosomal analyses identify distinct genetic regulators of cytokine production, demonstrating that many cQTLs act in a sex-specific manner across Tanzanian and Dutch cohorts and can be missed by pooled analyses.

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Article title:
Sex-stratified genetic regulators of cytokine production in the Dutch and Tanzanian populations

First author:
Amour C

Journal:
Human Genetics and Genomics Advances, Journal Pre-proof

DOI:
10.1016/j.xhgg.2026.100593

Reference:
Amour C, Cetatean R, Ponce IR, Keur N, Temba GS, Kullaya VI, Mmbaga BT, Kavishe R, Joosten LAB, Netea MG, de Mast Q, Boahen CK, Kumar V, Sex-stratified genetic regulators of cytokine production in the Dutch and Tanzanian populations, Human Genetics and Genomics Advances (2026), doi: https://doi.org/10.1016/j.xhgg.2026.100593.

License:
Not specified in the provided text.

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/sex-stratified-cytokine-qtl

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-19.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing (1) Tanzanian cohort results (12 cQTLs; 7 male-specific, 5 female-specific), (2) Dutch cohort results (12 cQTLs; 6 male-specific, 6 female-specific), (3) exemplar sex-specific loci TOX (male IFN-γ) and EGFR (female IL-10), (4) CNTNAP2 and ANXA8 findings, (5) colocalization ana
- transcript topics: Sex differences in immune regulation and cytokine signaling; Cohort design: Tanzanian (TZ) and Dutch (NL) sex-stratified cQTL mapping; TOX locus and IFN-γ response in males (S. pneumoniae); EGFR locus and IL-10 response in females (C. burnetii); CNTNAP2 locus and IFN-γ response in females (M. tuberculosis).; ANXA8 locus and TNF-α response in females (C. albicans)

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Two cohorts: Tanzania TZFG and Netherlands 500FG (Dutch) with sex-stratified cQTL mapping
- Tanzanian cohort identified 12 genome-wide significant cQTLs (7 male-specific, 5 female-specific)
- Dutch cohort identified 12 genome-wide significant cQTLs (6 male-specific, 6 female-specific)
- TOX locus variant rs10092649 associated with IFN-γ production after S. pneumoniae stimulation in males
- EGFR-proximal locus rs79030770 associated with IL-10 production after C. burnetii stimulation in females
- CNTNAP2 locus variant rs17170577 associated with IFN-γ production after M. tuberculosis stimulation in females

QC result: Pass.

Study Highlights:
Using ClinVar curation and comparison to benign and pathogenic reference sets, the authors analyzed TP53 germline variants with multiple functional assays, bioinformatic predictors, immune-fitness scores, and gnomAD frequencies. Reduced-penetrance variants tended to show intermediate activity across Kato, Giacomelli, Kotler, and Funk assays and intermediate BayesDel/AlphaMissense/aGVGD scores, with higher allele frequencies than pathogenic variants. A random forest model trained on these features prioritized 106 additional ClinVar missense variants as potential reduced-penetrance candidates. Clinically, carriers of reduced-penetrance variants exhibited later average age at first cancer and weaker enrichment for core Li-Fraumeni phenotypes, supporting consideration of attenuated surveillance criteria.

Conclusion:
Reported reduced-penetrance TP53 variants display intermediate functional and bioinformatic signatures, higher population frequency, and later cancer onset, and a combined-feature predictive model identifies additional candidate reduced-penetrance variants for follow-up.

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Article title:
Characteristics predicting reduced penetrance variants in the high-risk cancer predisposition gene TP53

First author:
Fortuno C

Journal:
Human Genetics and Genomics Advances

DOI:
10.1016/j.xhgg.2025.100484

Reference:
Fortuno C, Richardson ME, Pesaran T, McGoldrick K, James PA, Spurdle AB. Characteristics predicting reduced penetrance variants in the high-risk cancer predisposition gene TP53. Human Genetics and Genomics Advances. 2025;6:100484. https://doi.org/10.1016/j.xhgg.2025.100484

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/tp53-reduced-penetrance-prediction

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-18.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited sections describing TP53 reduced-penetrance variants, four functional assays (Kato, Giacomelli, Kotler, Funk), bioinformatic predictors (BayesDel, AlphaMissense, aGVGD), immune fitness, population allele frequency, a random forest model identifying additional candidates, and associated clinical implications.
- transcript topics: TP53 and Li-Fraumeni syndrome background; Functional assays (Kato, Giacomelli, Kotler, Funk); Bioinformatic predictors (BayesDel, AlphaMissense, aGVGD); Immune fitness predictions; Population allele frequency (gnomAD); Random forest model and variant prioritization

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Reduced penetrance TP53 variants show intermediate functional activity across four assays (Kato, Giacomelli, Kotler, Funk).
- Brazilian founder TP53 variant c.1010G>A (p.R337H) is discussed among the reduced penetrance set.
- Benign reference set (62 variants) and pathogenic reference set (113 variants) used for comparison; 11 reduced penetrance variants identified from ClinVar/other sources.
- Four functional assays (Kato, Giacomelli, Kotler, Funk) with intermediate results for reduced penetrance variants.
- Bioinformatic predictors (BayesDel, AlphaMissense, aGVGD) predict deleterious effects for reduced penetrance variants with lower scores than pathogenic variants.
- Immune fitness indicates intermediate visibility of reduced penetrance variants—between benign and pathogenic.

QC result: Pass.

Study Highlights:
This study analyzed three unrelated human individuals using RNA-seq on whole-blood and fibroblasts and applied a FRASER-based minor intron retention (MIR) outlier pipeline alongside whole-genome sequencing. The integrated approach identified biallelic RNU6ATAC variants that map to U4atac–U6atac Stem I/II and the central stem-loop of U6atac. Affected individuals show transcriptome-wide excess MIR (for example A1 exhibited 254 MIR outliers in whole blood and B1 exhibited 16 MIR outliers in fibroblasts), indicating impaired minor spliceosome function. The molecular defect correlates with impaired growth and variable multisystem phenotypes including immunodeficiency and neurodevelopmental involvement.

Conclusion:
Biallelic RNU6ATAC variants cause a multisystem minor spliceopathy defined by transcriptome-wide minor intron retention and variable short stature, immunologic, and neurodevelopmental manifestations.

Music:
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Article title:
Biallelic Variants in RNU6ATAC Result in a Minor Spliceopathy Characterized by Transcriptome-Wide Minor Intron Retention Events and Short Stature with Variable Multisystem Manifestations

First author:
Mendez R

Journal:
Human Genetics and Genomics Advances, Journal Pre-proof

DOI:
10.1016/j.xhgg.2026.100588

Reference:
Mendez R, Arriaga TM, Ma J, Bonner DE, Emami S, Levy RJ, Alsagheir A, Alhaddad B, Bakur K, Ungar RA, Matalon DR, Miller AM, Nguyen J, Smith KS, Scott SA, Liao L, Ng Z, Marwaha S, Ward A, Undiagnosed Diseases Network, Genomics Research to Elucidate the Genetics of Rare Diseases Consortium, Novacic D, Alkuraya FS, Bernstein JA, Ganesh VS, O’Donnell-Luria A, Montgomery SB, Wheeler MT, Biallelic Variants in RNU6ATAC Result in a Minor Spliceopathy Characterized by Transcriptome-Wide Minor Intron Retention Events and Short Stature with Variable Multisystem Manifestations, Human Genetics and Genomics Advances (2026), doi: https://doi.org/10.1016/j.xhgg.2026.100588

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/rnu6atac-minor-spliceopathy

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-18.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections describing MIR as a transcriptome-wide effect, structural disruption of U4atac–U6atac, FRASER MIR filtering, need for WGS over WES, CADD/conservation evidence, tissue-specific effects, and the bridging C1 phenotype.
- transcript topics: Minor intron retention (MIR) and transcriptome-wide MIR pattern; RNU6ATAC structural disruption (Stem I/II and central stem-loop); FRASER MIR outlier analysis and tissue specificity; Whole-genome sequencing vs whole-exome sequencing; CADD scores and evolutionary conservation; Clinical bridging phenotype (A1, B1, C1) and spectrum of RNU6ATAC-opathy

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Three unrelated individuals with biallelic RNU6ATAC variants
- A1: 254 MIR outliers in whole blood; B1: 16 MIR outliers in fibroblasts
- Variants localize to U4atac–U6atac Stem I/II and central stem-loop regions
- WGS was necessary because RNU6ATAC is not targeted by standard WES kits
- RNU6ATAC variants yield CADD scores between 18 and 21
- Conservation across vertebrates, including zebrafish

QC result: Pass.

Study Highlights:
The study analyzed RNA-seq from COPDGene whole blood (n≈3,743) and LTRC lung tissue (n=1,241) using LeafCutter for splicing and tensorQTL for cis associations, followed by Moloc colocalization and targeted Oxford Nanopore long-read sequencing. Authors identified 58,258 lung splice sites and widespread eQTLs/sQTLs, and found 38 genomic windows (corresponding to 33 GWAS loci) with strong colocalization between QTLs and COPD GWAS signals. Top colocalizations in lung sQTLs included NPNT, FBXO38, HHIP, NTN4, and BTC, and long-read data resolved isoform changes for FBXO38 and BTC. Functionally, FBXO38 cryptic exon inclusion is associated with predicted nonsense-mediated decay and decreased expression, and BTC exon 4 inclusion alters isoform ratios that affect the EGF-like domain.

Conclusion:
Multiple COPD GWAS associations colocalize with sQTLs and eQTLs in lung and blood, identifying candidate genes such as FBXO38 and BTC and implicating splicing-mediated mechanisms in COPD risk.

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Article title:
Overlap between COPD genetic association results and transcriptional quantitative trait loci

First author:
Saferali A

Journal:
Human Genetics and Genomics Advances

DOI:
10.1016/j.xhgg.2025.100493

Reference:
Saferali A., Kim W., Chase R.P., NHLBI TransOmics in Precision Medicine (TOPMed), Vollmers C., Silverman E.K., Cho M.H., Castaldi P.J., Hersh C.P. Overlap between COPD genetic association results and transcriptional quantitative trait loci. Human Genetics and Genomics Advances. 2026 Jan 15;7:100493. https://doi.org/10.1016/j.xhgg.2025.100493.

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/copd-sqtl-fbxo38-btc

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-16.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited substantive transcript content describing COPD genetic architecture, sQTL/eQTL mapping in lung tissue (LTRC) and whole blood (COPDGene), the LeafCutter/TensorQTL/Moloc pipeline, FBXO38 cryptic exon and NMD, BTC exon 4 splicing, long-read validation, and translational implications.
- transcript topics: COPD genetic architecture and regulatory mechanisms; sQTL/eQTL mapping in lung tissue (LTRC) and whole blood (COPDGene); LeafCutter splicing analysis; TensorQTL cis associations; Moloc colocalization; FBXO38 cryptic exon and nonsense-mediated decay

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- 38 colocalization windows across 33 COPD GWAS loci with high posterior probability of shared causality (CPP>0.8)
- 58,258 lung splice sites identified in LTRC; 10,615 genes associated
- FBXO38: COPD-risk rs7730971 associated with a 158 bp cryptic exon; introduces premature stop codon and likely subjected to nonsense-mediated decay; reduced FBXO38 expression
- BTC: COPD-risk allele promotes increased inclusion of exon 4; shifts BTC isoform ratios and affects EGF-like domain
- Oxford Nanopore long-read sequencing validated FBXO38 and BTC isoforms
- Bulk RNA-seq in blood (COPDGene) and lung (LTRC) acknowledged as a limitation; single-cell follow-up suggested

QC result: Pass.

Study Highlights:
Using the UCLA ATLAS EHR-linked biobank, the authors trained random forest classifiers on demographics, healthcare utilization, and ICD-10 features to distinguish enrolled from background patients. They converted predicted enrollment probabilities into inverse-probability weights and applied these to GWAS replication tests and PGS-PheWAS scans. The classifier achieved AUROC≈0.85 and weighting increased replication of known GWAS variants by 54% while changing phenome-wide PGS association patterns. These results indicate that enrollment-driven inclusion bias can materially affect variant discovery and downstream PGS-based phenotypic associations in health-system biobanks.

Conclusion:
Inclusion bias in EHR-linked biobanks like UCLA ATLAS measurably affects common-variant discovery and PGS associations, and enrollment-aware inverse-probability weighting can improve replication while reducing effective sample size.

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Article title:
Inclusion bias affects common variant discovery and replication in a health-system linked biobank

First author:
Pimplaskar A

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.02.011

Reference:
Pimplaskar A, Qiu J, Lapinska S, Tozzo V, Chiang JN, Pasaniuc B, Olde Loohuis LM. Inclusion bias affects common variant discovery and replication in a health-system linked biobank. The American Journal of Human Genetics. 2026;113:1–13. https://doi.org/10.1016/j.ajhg.2026.02.011

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/inclusion-bias-ucla-atlas

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-14.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing enrollment-bias methodology (random forest classifier, inverse-probability weighting), key numeric results (AUROC/AUPRC, enrollment counts, ORs), GWAS replication improvements, and PGS-PheWAS outcomes, plus implications and limitations.
- transcript topics: Enrollment bias in UCLA ATLAS biobank; Random forest classifier for enrollment prediction; Inverse-probability weighting and normalization; Effective sample size and trade-offs; GWAS variant replication under weighting; Variant-level associations and ancestry effects

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Enrollment in ATLAS: background population ~1.57–1.57 million; enrolled ~104,516
- Primary care at UCLA strongly predicts enrollment: ~70.2% enrolled vs ~21.8% unenrolled; OR ≈ 8.44
- Enrolled individuals have higher healthcare utilization: ~12.8 visits/year vs ~6.7
- RF model discriminates enrollment with AUROC ≈ 0.85 and AUPRC ≈ 0.82
- Inverse-probability weighting reduces effective sample size to ≈11,319.9 (4.3× reduction; from ≈48k)
- Weighting increases replication of known GWAS variants by ≈54%

QC result: Pass.

Study Highlights:
This study analysed clinical Vibrio cholerae and ICP1 isolates from stool in Bangladesh using genomic surveillance, plaque assays, qPCR, experimental phage evolution, TEM and mass spectrometry. The authors identify a newly acquired mobile element, PLE11, whose small protein Rta disrupts ICP1 tail assembly by targeting the phage tape measure protein (TMP), producing genome-filled tailless capsids. PLE11 also encodes a TMP and other tail factors enabling assembly of chimeric virions that incorporate PLE-encoded TMP and BhuB, preserving satellite transmission. Continued surveillance documented natural ICP1 counteradaptation via CRISPR–Cas acquisition and convergent TMP substitutions that restore infectivity.

Conclusion:
Acquisition of PLE11 encoding the tail-targeting protein Rta drove selection of phage-resistant Vibrio cholerae in Bangladesh and prompted convergent ICP1 counteradaptations that restore phage propagation.

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Article title:
Capturing dynamic phage–pathogen coevolution by clinical surveillance

First author:
Mathur Y

Journal:
Nature

DOI:
10.1038/s41586-026-10136-z

Reference:
Mathur Y., Boyd C. M., Farnham J. E., Monir M. M., Islam M. T., Sultana M., Ahmed T., Alam M. & Seed K. D. Capturing dynamic phage–pathogen coevolution by clinical surveillance. Nature (2026). https://doi.org/10.1038/s41586-026-10136-z

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/ple11-rta-icp1-tail-assembly

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-12.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections that discuss the phage–bacteria arms race, PLE11 and Rta, TMP/TAC/BhuB, chimeric tail assembly, phage counterdefenses (CRISPR–Cas, Odn, Adi), and clinical surveillance data from Bangladesh, including outbreak dynamics and convergent evolution.
- transcript topics: Phage–bacteria arms race overview; Phage satellites (PLEs) and anti-PLE strategies; Rta-mediated tail assembly restriction via TMP targeting; Chimeric tail assembly with PLE11-encoded components; ICP1 counterdefenses (CRISPR–Cas, Odn, Adi) and phage evolution; Clinical surveillance in Bangladesh (BD-1.2 sweep, 2022 outbreak)

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Rta (PLE11-encoded) restricts ICP1 tail assembly by targeting TMP
- PLE11 encodes its own TMP and tail assembly factors (TAC) and BhuB to form chimeric tails enabling PLE transmission
- BD-1.2 Vibrio cholerae populations acquired PLE11 and reached ~91% prevalence within 9 months
- ICP1 populations shifted from Odn-mediated resistance to CRISPR–Cas–mediated resistance, with TMP substitutions (e.g., L362P, N355S) observed
- TEM and proteomics show PLE11 tails incorporate PLE11 TMP and BhuB and lack ICP1 TMP/BhuB, producing shorter tails (~10 nm)
- Outbreak in Dhaka, Bangladesh in early 2022 involved >42,000 cholera patients

QC result: Pass.

Study Highlights:
The study deployed a centralized Proactive Genomic Reanalysis (PGR) workflow on a Boston Children’s Hospital pediatric ES/GS cohort integrated into the CRDC infrastructure. Key methods combined DRAGEN reprocessing, automated HPO extraction from EHR notes, CFA filtering on the GeneDx research platform and a VS-NN variant-scoring neural network followed by two-pass manual review. Applied to 2,144 previously unsolved cases, the pipeline flagged 310 variants, manual review prioritized 45 variants in 42 patients, and clinicians judged 33 variants to have high suspicion of disease causality, yielding ~2% candidate diagnostic rate. The work shows that institution-led, semi-automated reanalysis can produce clinically actionable findings while reducing reliance on clinician-initiated lab reanalysis, though it requires infrastructure for data transfer, confirmation and patient recontact.

Conclusion:
A centralized, semi-automated, clinically integrated Proactive Genomic Reanalysis workflow at Boston Children’s Hospital is feasible and identified candidate diagnostic variants in 2% of reviewed pediatric ES/GS cases, demonstrating a scalable model that can increase diagnoses while requiring institutional resources for confirmation and recontact.

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Article title:
Scaling genomic reanalysis to unlock diagnoses and transform rare disease care

First author:
Rockowitz S

Journal:
Human Genetics and Genomics Advances

DOI:
10.1016/j.xhgg.2026.100582

Reference:
Rockowitz S, Shao W, French C, Truong TK, Hagen J, McGonigle R, et al.; and Wendy K. Chung. Scaling genomic reanalysis to unlock diagnoses and transform rare disease care. Human Genetics and Genomics Advances. 2026;7:100582. https://doi.org/10.1016/j.xhgg.2026.100582.

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/proactive-genomic-reanalysis-bch

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-11.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the portion of the transcript describing the centralized Proactive Genomic Reanalysis (PGR) workflow, VS-NN AI scoring, NLP-based HPO extraction, CFA/DRAGEN pipelines, pilot results, and implementation challenges including data access and recontact.
- transcript topics: Centralized Proactive Genomic Reanalysis (PGR) workflow; VS-NN variant scoring neural network; HPO NLP and phenotype matching; DRAGEN read mapping and CFA filtering; Two-pass manual review process; Pilot results: dataset size, variant counts, and diagnostic yield

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- PGR pipeline yielded a 2% diagnostic rate in the initial pilot
- Pilot dataset: 2,144 patients; 62,637 variants; 310 flagged by VS-NN; 45 returnable in 42 patients; 33 high-suspicion variants
- VS-NN AUC: 0.99 for pathogenic/likely pathogenic (P/LP); 0.94 for variants of uncertain significance (VUS)
- NLP-extracted HPO terms enabled dynamic phenotyping; including NLP terms did not significantly change VS-NN scores

QC result: Pass.

Study Highlights:
This review focuses on human populations and uses conceptual frameworks, hypothetical population examples, and synthesis of methodological studies to evaluate PRS and SDoH integration. It summarizes methods for PRS construction and transferability, SDoH measurement at individual and area levels, and analytic approaches including interaction, mediation, and calibration. Quantitatively, the authors note substantial declines in PRS predictive accuracy when applied to genetically distinct populations (for example, African-ancestry performance often ~20–40% of European-derived PRS). The review highlights harmonization, population-specific calibration, and interdisciplinary teams as functional steps to improve predictive validity and reduce inequitable impacts.

Conclusion:
Integrating PRSs with carefully measured and harmonized SDoH across diverse populations requires population-aware conceptual frameworks, calibrated analytic methods, diverse datasets, and ethical safeguards to improve predictive validity and equity.

Music:
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Article title:
Incorporating polygenic risk scores and social determinants of health across populations: Considerations and best practices in research

First author:
Cromer SJ

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.02.007

Reference:
Cromer SJ, Cobran EK, Iyer HS, Hysong MR, Vargas LB, Smith JL, Konigsberg IR, Bogumil D, Glover L, King G, PRIMED Consortium SDoH Working Group, Lange LA, Patel A, Wojcik G, Raffield L, Conti DV, et al. Incorporating polygenic risk scores and social determinants of health across populations: Considerations and best practices in research. The American Journal of Human Genetics. 2026;113:1–25. https://doi.org/10.1016/j.ajhg.2026.02.007

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/polygenic-risk-sdoh-harmonization

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-10.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited substantive sections of the transcript covering PRS basics, PRS transferability across populations, SDoH domains and measurement, harmonization challenges, analytical frameworks (main effects, interactions, mediation), T2D as an illustrative case, and ethical considerations.
- transcript topics: PRS basics and transferability; SDoH four-domain framework (socioeconomic, sociocultural, physical environment, healthcare access); Individual vs area-level SDoH measures; SDoH harmonization across datasets; Analytical frameworks (main effects, interaction/effect modification, mediation); T2D as illustrative example

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- PRS predictive accuracy declines across populations; African-ancestry accuracy ~20–40% of European-derived PRS
- SDoH clustering, distribution, and effect sizes vary across populations and can modify PRS effects; harmonization improves transferability
- Ethical and representation issues are critical to study design and interpretation
- Race and ethnicity are socially constructed; genetic similarity is a continuous spectrum
- SDoH measured at individual and area levels across four domains
- Harmonization of SDoH measures is challenging; ecological fallacy cautions apply

QC result: Pass.

Study Highlights:
Using epidermis-specific (2aEpKO) and conventional (2aKO) Mfsd2a-deficient mice, lineage tracing, untargeted shotgun lipidomics, LightOx-LPC uptake assays, and primary human keratinocyte cultures, the authors mapped Mfsd2a expression to suprabasal/granular keratinocytes and demonstrated Mfsd2a-dependent uptake of plasma-derived LPC in vivo. Lipidomic quantification showed reductions in linoleate-containing phospholipids (PL-18:2 decreased ~15% in 2aEpKO and ~13% in 2aKO) and a marked loss of TAG-18:2 (−79% in 2aEpKO). Inducible epidermal Mfsd2a loss produced transient dermatitis, defective desquamation, retained lamellar bodies, and keratinocyte activation, while MFSD2A knockdown in human keratinocytes reduced LPC-driven differentiation. Functional rescue experiments in vitro revealed that LPC-18:1 and LPC-18:2 promote keratinocyte differentiation in an MFSD2A-dependent manner, linking plasma LPC uptake to epidermal lipid homeostasis and differentiation.

Conclusion:
Mfsd2a mediates uptake of plasma-derived LPC (notably LPC-18:2) into suprabasal keratinocytes to maintain linoleate-containing phospholipid pools and support keratinocyte differentiation and normal desquamation.

Music:
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Article title:
Mfsd2a is important for maintaining epidermal homeostasis

First author:
Wong BHH

Journal:
Proc. Natl. Acad. Sci. U.S.A

DOI:
10.1073/pnas.2531159123

Reference:
Wong BHH, Behmoaras J, Chua AWC, Galam DLA, Tan BC, Torta F, Chin CF, Mishra K, Ding M, Silver DL. Mfsd2a is important for maintaining epidermal homeostasis. Proc. Natl. Acad. Sci. U.S.A. 2026 Feb 19;123(8):e2531159123. https://doi.org/10.1073/pnas.2531159123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/mfsd2a-lpc-epidermal-homeostasis

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-09.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing MFSD2A expression in epidermal keratinocytes, inducible epidermis-specific and conventional Mfsd2a knockout phenotypes, epidermal lipidomics (18:2 species and DAG shifts), LightOx-LPC uptake demonstrating MFSD2A dependence, and MFSD2A-dependent differentiation of human keratin
- transcript topics: MFSD2A expression in differentiated epidermal keratinocytes; Inducible postnatal Mfsd2a deficiency and dermatitis; Conventional Mfsd2a knockout and desquamation defects; Epidermal lipidomics: PL-18:2 and TAG-18:2 reductions; DAG shifts; LPC uptake into epidermis using LightOx-LPC and MFSD2A dependence; MFSD2A-dependent differentiation of human keratinocytes with LPCs

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- MFSD2A is predominantly expressed in differentiated epidermal keratinocytes, enriched in the granular layer
- Inducible epidermis-specific Mfsd2a deficiency (2aEpKO) causes dermatitis, defective desquamation, hyperkeratosis, and keratinocyte activation
- Conventional Mfsd2a knockout (2aKO) shows desquamation defects with hyperkeratosis and parakeratosis
- Epidermal lipidome is altered by Mfsd2a deficiency, with reduced PL-18:2 and TAG-18:2 and reciprocal DAG changes
- Plasma-derived LPC uptake into epidermis is MFSD2A-dependent, demonstrated by LightOx-LPC uptake being absent in 2aEpKO/2aKO but present in controls
- LPC18:1 and LPC18:2 promote human primary keratinocyte differentiation in an MFSD2A-dependent manner

QC result: Pass.

Study Highlights:
Using CRISPR/Cas9-generated GPO1 mutant Drosophila and isolated thoracic mitochondria, the authors combined enzymatic assays, ATP production and oxygen consumption measurements, and H2O2 emission assays to probe mtG3PDH function. Loss of mtG3PDH markedly reduced mtG3PDH enzymatic activity and drove a ~60% decrease in ATP production and ~33% decrease in O2 consumption, producing a pronounced drop in mitochondrial efficiency (ATP/O). mtG3PDH-linked ROS emission was also strongly reduced (~70%), reflecting diminished direct and reverse electron-transfer ROS generation. Functionally, GPO1 flies showed sharply reduced survival and severe climbing impairment, linking the bioenergetic defects to organismal outcomes.

Conclusion:
mtG3PDH is essential for mitochondrial bioenergetics and redox homeostasis in Drosophila, with GPO1 loss causing major decreases in ATP production, O2 consumption, mitochondrial efficiency, and mtG3PDH-linked ROS that correlate with reduced survival and locomotion.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
When alternative becomes essential: The role of mitochondrial glycerol-3-phosphate dehydrogenase

First author:
Herpe L

Journal:
Proc. Natl. Acad. Sci. U.S.A

DOI:
10.1073/pnas.2535701123

Reference:
Herpe L, Aminot M, Pichaud N. When alternative becomes essential: The role of mitochondrial glycerol-3-phosphate dehydrogenase. Proc. Natl. Acad. Sci. U.S.A. 2026;123(9):e2535701123. https://doi.org/10.1073/pnas.2535701123

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/drosophila-mtg3pdh-gpo1

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-08.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited sections cover mtG3PDH function, CRISPR/Cas9 GPO1 knockout in Drosophila, thoracic mitochondria bioenergetics (ATP production, oxygen consumption, ATP/O), ROS production and RET, organismal outcomes (lifespan, climbing), and translational implications.
- transcript topics: mtG3PDH shuttle function and GPO1; CRISPR/Cas9 GPO1 knockout in Drosophila; thoracic mitochondria bioenergetics: ATP production; oxygen consumption and coupling efficiency (ATP/O); ROS production and reverse electron transfer; complex I independence and grid collapse

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 5
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- mtG3PDH knockout reduces ATP production by ~60%
- O2 consumption decreases by ~33%
- mitochondrial efficiency (ATP/O) is markedly reduced (uncoupling observed)
- mtG3PDH-linked ROS emission decreases by ~70%
- survival (median lifespan) drops from ~33 days to ~12 days in GPO1 mutants
- climbing performance declines to ~1% in mutants (vs ~68.5% in controls)

QC result: Pass.

Study Highlights:
This review focuses on term infants, particularly C‑section and intrapartum antibiotic–exposed neonates, synthesizing cohort and intervention data using 16S rRNA gene amplicon sequencing and metagenomic approaches. Maternal fecal microbiota transplantation (maternal FMT) shifted C‑section infants’ gut communities to resemble vaginally born infants and uniquely restored Bacteroidaceae, while a Bifidobacterium–Lactobacillus–FOS supplement increased bifidobacteria; vaginal seeding did not normalize overall gut composition. The authors link restoration of key taxa to potential reductions in risks such as allergy and overweight and emphasize breastfeeding as an essential adjunct to restoration strategies.

Conclusion:
Evidence supports action to address early-life gut microbiota disruption: probiotics and maternal FMT show promising restorative effects, but optimal, scalable solutions and long-term immune outcomes remain to be established.

Music:
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Article title:
Infant gut microbiota restoration: state of the art

First author:
Korpela K

Journal:
Gut Microbes

DOI:
10.1080/19490976.2022.2118811

Reference:
Korpela K, de Vos WM. Infant gut microbiota restoration: state of the art. Gut Microbes. 2022;14(1):e2118811. https://doi.org/10.1080/19490976.2022.2118811

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/maternal-fmt-bifidobacterium-restoration

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-07.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript sections describing vertical transmission, HMOs and breast milk, birth-mode and antibiotic effects, restoration interventions (vaginal seeding, Lactobacillus probiotics, Bifidobacterium-Lactobacillus-FOS multispecies, maternal FMT), PCA-based analysis, preterm considerations, and long-term health
- transcript topics: Vertical transmission and HMOs feeding infant gut microbes; Birth mode and intrapartum antibiotic effects on microbiota; Microbiota restoration interventions: vaginal seeding, probiotics, multispecies probiotics, maternal FMT; PCA analysis as a measure of restoration efficacy; Bifidobacteriaceae and Bacteroidaceae dynamics across interventions; Preterm infant microbiota and NICU interventions

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Maternal FMT can restore CS-born infant gut microbiota toward vaginal births, with persistence at 1 and 3 months
- Bacteroidaceae restoration is achieved by maternal FMT; other interventions fail to restore this family
- Vaginal seeding does not restore gut microbiota composition (fails to move CS-born infants toward vaginal baseline)
- Lactobacillus-only probiotic shows minimal to no restoration of the gut microbiota in CS-born infants
- Multispecies Lactobacillus–Bifidobacterium–FOS probiotic partially restores gut microbiota toward vaginal composition; benefits observed in larger RCT with reduced IgE-allergy risk
- Breastfeeding enhances probiotic/restoration effects; HMOs fuel infant-adapted microbes and are essential for full restoration

QC result: Pass.

Study Highlights:
Using 30× WGS of 2,680 LASI-DAD participants, the authors constructed an LD lookup panel (69.5 million variants), phased with Eagle2.4, and identified LD structure with LDetect and Big-LD. They compared regional varLD to 1000G super-populations and evaluated imputation with Minimac4 and meta-imputation against TOPMed and GAsP. LASI-DAD increased imputation accuracy (aggregated r2) by a mean 38% versus TOPMed and 27% versus GAsP across allele frequencies and improved PRS predictive performance by 2.1%–35.1% across traits and studies. Finer-scale stronger LD and regional LD differences in LASI-DAD translate into more accurate LD estimates and better imputation and PRS transferability for Indian sub-populations.

Conclusion:
LASI-DAD is the largest nationally representative Indian WGS reference panel to date and it improves LD estimation, genotype imputation accuracy, and PRS construction for Indian and South Asian populations.

Music:
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Article title:
A reference panel for linkage disequilibrium and genotype imputation using whole-genome sequencing data from 2,680 participants across India

First author:
Li Z

Journal:
Human Genetics and Genomics Advances

DOI:
10.1016/j.xhgg.2026.100579

Reference:
Li Z, Zhao W, Zhou X, Leung YY, Schellenberg GD, Wang L-S, Schönherr S, Forer L, Fuchsberger C, Dey S, Lee J, Smith JA, Dey AB, Kardia SLR. A reference panel for linkage disequilibrium and genotype imputation using whole-genome sequencing data from 2,680 participants across India. Human Genetics and Genomics Advances. 7 (2026) 100579. https://doi.org/10.1016/j.xhgg.2026.100579.

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/lasi-dad-india-reference-panel

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-06.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantive auditing of the transcript’s scientific content covered the LASI-DAD cohort design and sequencing depth; LD/imputation methodology (LD blocks, LDetect/Big-LD, varLD); LD panel variant counts; subpopulation structure (ANI/ASI) and PRS transferability; imputation performance and meta-imputation; and data avai
- transcript topics: LASI-DAD cohort design and 30× whole-genome sequencing; LD reference panel construction and variant counts (69.5 million) and comparisons; LD blocks and varLD analyses across populations; LASI-DAD sub-populations by ANI percentage and geographic cline; PRS transferability and cross-population performance; Imputation performance and meta-imputation across reference panels

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- LASI-DAD WGS sample size = 2,680 individuals
- Sequencing depth = 30×
- LD reference panel variant count = 69.5 million
- Imputation gains: mean aggregated r2 improvements = 38% versus TOPMed and 27% versus Genome Asia Pilot (GAsP)
- PRS predictive performance improvement = 2.1%–35.1% across traits and studies
- Rare variant imputation: 61,843,011 variants imputed

QC result: Pass.

Study Highlights:
Using PANDORA-seq on C57BL/6J mouse sperm (intact and de-membranated heads) across five age groups and two independent human sperm cohorts, the authors identify a sharp tsRNA/rsRNA "aging cliff" in mice between 50–70 weeks and a head-specific rsRNA length shift. PANDORA-seq overcomes modification-induced detection bias to reveal increases in longer rsRNAs and decreases in shorter rsRNAs, particularly from 28S- and 18S-rRNAs, with parallel trends in human cohorts. Mitochondrial tsRNAs/rsRNAs in sperm heads, although low abundance, covary with genomic sncRNAs and help distinguish age groups. Transfection of age-mimicking tsRNA/rsRNA cocktails into mouse embryonic stem cells reprograms gene expression, upregulating metabolic and neurodegeneration-related pathways, providing a functional link to offspring phenotypes.

Conclusion:
PANDORA-seq uncovers a conserved, sperm head–specific rsRNA length shift and a tsRNA/rsRNA aging cliff in mice and humans, and age-mimicking sncRNA combinations can alter embryonic transcriptomes linked to metabolic and neurodegenerative pathways.

Music:
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Article title:
Conserved shifts in sperm small non-coding RNA profiles during mouse and human aging

First author:
Shi J

Journal:
The EMBO Journal, doi:10.1038/s44318-025-00687-8

DOI:
10.1038/s44318-025-00687-8

Reference:
Shi J, Zhang X, Cai C, Liu S, Yu J, James ER, et al. Conserved shifts in sperm small non-coding RNA profiles during mouse and human aging. The EMBO Journal. 2026;45(4):1362–1380. https://doi.org/10.1038/s44318-025-00687-8

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/sperm-rsrna-length-shift

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-05.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Substantively audited the transcript segments describing (1) the aging cliff in mouse sperm tsRNA/rsRNA profiles, (2) rsRNA length shifts in sperm heads, (3) cross-species conservation in humans, (4) mitochondrial sncRNA patterns, (5) functional RNA transfection experiments in mouse embryonic stem cells, (6) the PANDOR
- transcript topics: PANDORA-seq methodology; mouse sperm aging cliff at 50-70 weeks; rsRNA length shift in mouse sperm heads (28S/18S origin); mitochondrial tsRNA/rsRNA patterns in sperm heads; conservation of rsRNA length shift in human sperm cohorts; functional reprogramming of mESC transcriptomes by age-mimicking sncRNA cocktails

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Aging cliff between 50 and 70 weeks in mouse sperm sncRNA profiles detected by PANDORA-seq.
- Sperm-head rsRNAs show an age-related length shift: longer rsRNAs increase and shorter rsRNAs decrease, especially from 28S- and 18S-derived rsRNAs.
- Conserved rsRNA length shift observed in humans across two independent cohorts (longitudinal and cross-sectional).
- Mitochondrial rsRNAs/tsRNAs detected in de-membranated sperm heads co-vary with genomic sncRNA aging patterns.
- Age-mimicking tsRNA/rsRNA cocktails transfected into mouse embryonic stem cells reprogram transcriptomes toward metabolic and neurodegeneration pathways.
- Pandora-seq overcomes RNA modification-induced detection bias to reveal previously undetectable sncRNA species.

QC result: Pass.

Study Highlights:
In Escherichia coli, the membrane-anchored protein SNIPE was shown to block phage λ by directly cleaving DNA during genome injection. The authors combined radiolabelled 32P phage DNA assays, time-lapse CFP-ParB/ParS microscopy, TurboID proximity labelling and pBPA crosslinking to map SNIPE localization and interactions. They report that membrane-localized SNIPE requires a DUF4041 domain and a GIY-YIG nuclease domain to generate DNA fragments during injection, reducing CFP-ParB puncta ~30-fold and producing a smear of 32P-labelled fragments; an E414A nuclease mutant abolished activity. Functionally, SNIPE prevents λ replication and cell lysis and provides broad defence against many siphoviruses via interactions with ManYZ and phage tape-measure proteins.

Conclusion:
SNIPE is a membrane-localized bacterial defence protein that associates with ManYZ and phage tape-measure proteins to directly cleave incoming phage DNA during genome injection, thereby blocking infection.

Music:
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Article title:
A membrane-bound nuclease directly cleaves phage DNA during genome injection

First author:
Saxton DS

Journal:
Nature, doi:10.1038/s41586-026-10207-1

DOI:
10.1038/s41586-026-10207-1

Reference:
Saxton DS, DeWeirdt PC, Doering CR, Roney IJ & Laub MT. A membrane-bound nuclease directly cleaves phage DNA during genome injection. Nature. 2026. https://doi.org/10.1038/s41586-026-10207-1

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/snipe-membrane-nuclease-phage-injection

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-04.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections covering SNIPE architecture and membrane localization, autoinhibition, phage DNA cleavage during genome injection (Hershey–Chase style), interactions with ManYZ andTape-measure proteins (TMP), proximity labelling, Bas14 mutation experiments, and SNIPE homologues/evolution.
- transcript topics: SNIPE membrane localization and domain architecture; Autoinhibition and self-DNA protection at the membrane; Cleavage of phage DNA during genome injection and Hershey–Chase-like evidence; Interaction with ManYZ and phage tape-measure protein during infection; TurboID proximity labelling findings for ManYZ and TMP interactions; Broad siphovirus defense and Bas14 mutation findings

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- SNIPE is a membrane-anchored protein with an N-terminal transmembrane domain, a DUF4041 domain in the middle, and a GIY-YIG nuclease domain at the C-terminus.
- SNIPE autoinhibits its nuclease activity when anchored to the inner membrane to avoid autoimmune DNA cleavage.
- SNIPE cleaves phage DNA during genome injection, producing fragmented 32P DNA signals and reducing infection.
- CFP-ParB foci (parS-labelled phage DNA) are reduced by ~30-fold in SNIPE-expressing cells during λparS infection.
- A Hershey–Chase–style assay shows a smear of 32P-labelled DNA fragments in SNIPE-expressing cells, reversed by nuclease-inactive mutants (E414A).
- SNIPE associates with ManYZ before infection and with phage tape-measure proteins during genome injection.

QC result: Pass.

Study Highlights:
The study analyzed human patients with late-onset recessive retinal dystrophy and combined genetic sequencing (WES/WGS and long-read RNA) with high-resolution imaging and proteomics. Iterative ultrastructure expansion microscopy and immuno-gold TEM localized SAXO6 to specific microtubule doublets in photoreceptor connecting cilia and outer segments and to motile cilia in airway models. Cross-linking mass spectrometry on isolated bovine tracheal cilia detected an interaction between SAXO6 Mn-motif regions and α-tubulin (Lys370), supporting SAXO6 as a microtubule inner protein. Functionally, predicted null SAXO6 genotypes segregate with late-onset RP or cone-rod dystrophy, implicating MIP dysfunction in long-term photoreceptor stability.

Conclusion:
Biallelic loss-of-function variants in SAXO6 cause late-onset retinal dystrophy, likely by disrupting a microtubule inner protein that stabilizes photoreceptor axonemes.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Loss-of-function variants in SAXO6, encoding a microtubule inner protein of photoreceptor cilia, cause a late-onset retinal dystrophy

First author:
Moye AR

Journal:
The American Journal of Human Genetics

DOI:
10.1016/j.ajhg.2026.02.001

Reference:
Moye AR, McCafferty CL, Lin S, Han JH, Dudakova L, Rodenburg K, Szabó V, Nagy ZZ, Zur D, Vajter M, Kousal B, Moulin AP, Graff-Meyer A, Roosing S, Mahroo OA, Arno G, Webster AR, Ben-Yosef T, Liskova P, Engel BD, Zobor D, Quinodoz M, Rivolta C. Loss-of-function variants in SAXO6, encoding a microtubule inner protein of photoreceptor cilia, cause a late-onset retinal dystrophy. The American Journal of Human Genetics. 2026 Mar 5;113:1–18. https://doi.org/10.1016/j.ajhg.2026.02.001

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/saxo6-photoreceptor-mip-retina

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-03.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections covering SAXO6 gene discovery and renaming from MDM1; SAXO6 LOF variants and segregation; SAXO6 localization in photoreceptor cilia and motile cilia; imaging methods iU-ExM and Ig-TEM; cross-linking MS evidence for SAXO6–α-tubulin interaction; rod vs cone MT doublet occupancy; clinical impli
- transcript topics: SAXO6 gene discovery and renaming from MDM1; Bi-allelic SAXO6 LOF variants and family segregation; Subcellular localization of SAXO6 in photoreceptor cilia (CC/OS) and in motile cilia; Imaging methods: iterative ultrastructure expansion microscopy (iU-ExM); Immuno-gold TEM localization of SAXO6; Cross-linking mass spectrometry evidence for SAXO6–α-tubulin interaction

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Six individuals from five families carry bi-allelic SAXO6 loss-of-function variants associated with late-onset RP/CRD
- SAXO6 renamed from MDM1 to SAXO6 (stabilizer of axonemal microtubules 6)
- SAXO6 localizes inside the lumen of photoreceptor ciliary microtubules and in motile cilia
- Cross-linking MS identifies an interaction between SAXO6 (Lys201) and α-tubulin (Lys370) with ~30 Å separation
- Iterative ultrastructure expansion microscopy expanded tissue ~10×, revealing SAXO6 localization along microtubule doublets
- Rods show SAXO6 occupancy on 6–7 microtubule doublets; cones on all 9 doublets

QC result: Pass.

Study Highlights:
The study assayed 221,412 fine-mapped human GWAS and eQTL variants using a massively parallel reporter assay (MPRA) across five cell lines and performed saturation mutagenesis on 136 TARVs. MPRA identified 13,121 trait-associated regulatory variants (TARVs) and showed that emVar status within endogenous CREs improves precision for causal-variant prioritization. Saturation mutagenesis defined activity blocks, assigned transcription factors for 91% of previously non-canonical TARVs, and revealed that only 69% of TARVs disrupt known TF motifs. The authors also detected regulatory epistasis in ~11% of nearby variant pairs, demonstrating non-additive effects between cis variants.

Conclusion:
Large-scale MPRA combined with saturation mutagenesis systematically identifies and mechanistically annotates thousands of human trait-associated regulatory variants at single-nucleotide resolution, revealing motif-disrupting and non-canonical TF mechanisms and local epistasis.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Functional dissection of complex trait variants at single-nucleotide resolution

First author:
Siraj L

Journal:
Nature, doi:10.1038/s41586-026-10121-6

DOI:
10.1038/s41586-026-10121-6

Reference:
Siraj L., Castro R.I., Dewey H.B., Kales S., Butts J.C., Nguyen T.T.L., Kanai M., et al. Functional dissection of complex trait variants at single-nucleotide resolution. Nature. https://doi.org/10.1038/s41586-026-10121-6

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/mpra-human-regulatory-variants

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-02.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript’s coverage of MPRA scale and variant coverage, TARV identification and counts, mechanistic categories (motif disruption and non-canonical mechanisms), saturation mutagenesis mapping, regulatory epistasis, recall/precision metrics, cell-type context, and translational HbA1c example.
- transcript topics: MPRA scale and variant coverage; TARV identification and counts; Motif disruption as mechanism; Saturation mutagenesis mapping and activity blocks; Non-canonical TARV mechanisms; Regulatory epistasis in nearby TARV pairs

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- MPRA tested 221,412 fine-mapped trait-associated variants
- Identified 13,121 TARVs with high precision
- 69% of TARVs disrupt known transcription factor motifs
- Saturation mutagenesis assigned TFs for 91% of non-canonical TARVs
- Regulatory epistasis detected in ~11% of nearby TARV pairs
- Precision for causal-variant prioritization ~82–83%; recall ~15–20%

QC result: Pass.

Episode title:
Patrilineal Y‑chromosome drive in a Utah pedigree (67% male offspring)

Study Highlights:
We analyzed 76,445 anonymized human pedigrees from the Utah Population Database using a Bayesian pedigree-propagation algorithm (Warp), complemented by transmission disequilibrium testing, permutation and Monte Carlo simulations. These methods identified a single patrilineal Y-chromosome lineage with 89 informative transmissions that produced 60 male and 29 female offspring, a 67.4% male proportion. Warp and the TDT independently flagged the same family and permutation/Monte Carlo tests indicated the observed male bias was unlikely to arise by chance (p≈0.001–0.05). The pattern is consistent with a Y-linked segregation distorter and is discussed as a possible contributor to unexplained male infertility and human sex-ratio dynamics.

Conclusion:
A multi-method analysis of deep Utah pedigrees identifies a statistically significant male-biased patrilineal lineage consistent with a Y-linked segregation distorter in humans.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
Signatures of sex ratio distortion in humans

First author:
Baldwin-Brown JG

Journal:
Annual Review of Ecology and Systematics

DOI:
10.64898/2026.02.04.702084

Reference:
Baldwin-Brown JG, Wesolowski S, Zimmerman RM, Peterson B, Tristani-Firouzi M, Hernandez EH, Aston KI, Yandell M, Phadnis N. Signatures of sex ratio distortion in humans. Annual Review of Ecology and Systematics. 2026. https://doi.org/10.64898/2026.02.04.702084

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/human-y-chromosome-drive

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-03-02.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript segments describing segregation distortion concepts, Warp Bayesian algorithm for detecting distorters, the UPDB/focal patrilineal lineage with 67.4% male offspring across 89 transmissions, TDT results, Monte Carlo validation, proposed Y-chromosome mechanisms (PRY cluster), and implications (male infe
- transcript topics: Segregation distortion concepts and Mendelian expectations; Warp Bayesian algorithm for detecting distorters in UPDB pedigrees; UPDB data and identification of a patrilineal Y-chromosome lineage with 60/29 across 89 transmissions; Transmission Disequilibrium Test (TDT) results; Monte Carlo validation of lineage bias (p ≈ 0.00138); Potential molecular mechanisms: PRY ampliconic gene cluster

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Identification of a patrilineal Y-chromosome distorter signal in humans using UPDB data (67.4% male across 89 transmissions in focal lineage)
- Warp Bayesian algorithm applied to UPDB pedigrees identifies putative distorter-carrying lineages (two male-biased families detected; six female-biased families)
- Focal patrilineal lineage across 89 informative transmissions yields 60 male and 29 female offspring (67.4% male)
- Transmission Disequilibrium Test (TDT) identifies the focal patrilineal lineage as significantly male biased (p ≈ 0.0249 after FDR; uncorrected p ≈ 0.00102)
- Monte Carlo simulations yield p ≈ 0.00138 for the focal lineage
- PRY gene cluster on the Y chromosome discussed as a prime mechanistic candidate for distortion

QC result: Pass.

Study Highlights:
The authors review applications across eukaryotic biodiversity, museum specimens, bulk samples and eDNA using short-read shotgun sequencing and genome skimming. They detail assembly-free and mapping-based bioinformatic methods (k-mer analyses, Read2Tree, Kraken2/CONSULT) and target-enrichment approaches for recovering phylogenetic markers. Quantitatively, low-coverage skims (from <1× to ~20×) can reliably recover organellar genomes and estimate genome size and repeat content using tools such as RESPECT and GenomeScope. Functionally, these approaches enable rapid reference database building, biomass estimation, and scalable monitoring that support the Global Biodiversity Framework.

Conclusion:
Short-read sequencing remains a cost-effective, broadly applicable toolkit that complements long-read references by enabling genome skimming, genome-size and repeat estimation, phylogenetics from low-coverage data, and museum-based biodiversity sampling.

Music:
Enjoy the music based on this article at the end of the episode.

Article title:
The untapped potential of short-read sequencing in biodiversity research

First author:
Bleidorn C

Journal:
Trends in Genetics, 42 (2026) 137-149. doi:10.1016/j.tig.2025.09.001

DOI:
10.1016/j.tig.2025.09.001

Reference:
Bleidorn C, Podsiadlowski L, Sandberg F, Martin S, Vogler AP. The untapped potential of short-read sequencing in biodiversity research. Trends Genet. 2026;42:137-149. https://doi.org/10.1016/j.tig.2025.09.001

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) - https://creativecommons.org/licenses/by/4.0/

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/short-read-genome-skimming

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-02-28.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the transcript’s scientific content: GBF motivation, short-read sequencing and genome skimming, museomics (Barcode Blitz), type genomics, assembly-free phylogenomics (USCOs, UCEs, k-mers), environmental DNA/metagenomics and biomass estimation, hologenome/holobiont concept, and sequencing economics.
- transcript topics: GBF motivation and large-scale biodiversity monitoring; Short-read sequencing basics and genome skimming; Museomics and Barcode Blitz (museum collections, degraded DNA); Type genomics and reference database curation; Assembly-free phylogenomics (USCOs, UCEs, k-mers); Environmental DNA/metagenomics and biomass estimation

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 8
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- Short-read sequencing provides a universal data source across scales from genomes to ecosystems and supports GBF objectives.
- Genome skimming yields high-copy DNA (organellar genomes, ribosomal repeats) from low-coverage data (5×–20×; ultralow <5× sometimes).
- Museum collections enable large-scale genomic data generation (e.g., Barcode Blitz) from degraded DNA.
- Type genomics creates validated reference datasets by sequencing type material.
- USCOs and assembly-free methods (e.g., Skmer, Mash, Read2Tree) enable phylogenomics from unassembled reads.
- PCR/metabarcoding biases are bypassed by genome skimming/metagenomics, improving biomass estimates.

QC result: Pass.

Studien-Highlights:

Dieses Dossier beleuchtet jahrzehntelange Arbeit in der Humangenetik und zur spinalen Muskelatrophie und betont insbesondere Studien zu SMN1 und SMN2. Zu den zentralen Methoden gehörten molekulargenetische Analysen, Spleißanalysen, Messungen der Proteinexpression sowie Stabilitätsassays zur funktionellen Validierung von Varianteneffekten. Ein zentraler mechanistischer Befund ist, dass Störungen sehr spät in der kodierenden Sequenz sich anders verhalten können, als einfache Modelle vorhersagen: Einige Transkripte entgehen dem erwarteten nonsense-mediated decay (NMD) und können die Proteinstabilität verändern. Diese experimentell validierten Erkenntnisse haben direkte Bedeutung für diagnostische Interpretation, Neugeborenen-Screening und Genotyp-Phänotyp-Korrelation bei SMA.

Fazit:

Prof. Wirths Karriere zeigt, dass die experimentelle Validierung von Spleiß- und Proteinstabilitäts-Effekten von SMN1/SMN2-Varianten für eine präzise klinische Interpretation bei SMA essenziell ist.

Musik:

Genieße die Musik, die auf diesem Beitrag basiert, am Ende der Episode.

Support:

Base by Base – Stripe-Spenden: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Offizielle Website: https://basebybase.com

Bei PaperCast Base by Base entdeckst du Aktuelles aus Genomik, funktioneller Genomik, struktureller Genomik und Proteomik.

Episodenlink: basebybase.com/episodes/smn1-smn2-splicing-wirth-2/

Study Highlights:
This special episode is based on a tribute dossier rather than a single new primary research paper. It highlights recurring scientific themes across Brunhilde Wirth's career: SMN1/SMN2 biology, exon splicing, functional validation of variants, nonsense-mediated decay edge cases, and genotype-phenotype interpretation in SMA.

Conclusion:
This release should be read as an editorial tribute and curated scientific overview, not as a summary of one canonical article.

Music:
Enjoy the music based on this article at the end of the episode.

Source document:
The Last Exon Light: A Tribute Dossier Celebrating the Scientific Career of Prof. Dr. Brunhilde Wirth

Source type:
Editorial tribute dossier / multi-source compilation

Reference:
The Last Exon Light: A Tribute Dossier Celebrating the Scientific Career of Prof. Dr. Brunhilde Wirth. Editorial tribute dossier and curated retrospective source text.

License:
Not specified in the provided text.

Support:
Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00

Official website https://basebybase.com

On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics.

Episode link: https://basebybase.com/episodes/smn1-smn2-splicing-wirth

QC:
This episode was reviewed as a special editorial release.

QC Scope:
- source-document framing, descriptive metadata, and publication text
- excludes automated single-article AI QC because this episode is a curated tribute dossier / multi-source compilation rather than one canonical research paper
- title, framing, and source attribution were reviewed manually

QC Summary:
- production mode: editorial tribute / multi-source compilation
- single-article AI QC: not applicable
- listener note: this episode synthesizes a tribute dossier celebrating Brunhilde Wirth's scientific career and related SMA/splicing themes

Metadata Audited:
- episode_title
- source_document_title
- source_type
- reference
- license