Cited by 70DNA Repair MechanismsEvolution and Genetic DynamicsGenetic factors in colorectal cancer

A natural mutator allele shapes mutation spectrum variation in mice

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Sasani, Thomas A., Ashbrook, David G., Beichman, Annabel C., Lu, Lu, Palmer, Abraham A., Williams, Robert W., Pritchard, Jonathan K., Harris, Kelley·2022·Nature

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Abstract

Although germline mutation rates and spectra can vary within and between species, common genetic modifiers of the mutation rate have not been identified in nature 1. Here we searched for loci that influence germline mutagenesis using a uniquely powerful resource: a panel of recombinant inbred mouse lines known as the BXD, descended from the laboratory strains C57BL/6J (B haplotype) and DBA/2J (D haplotype). Each BXD lineage has been maintained by brother-sister mating in the near absence of natural selection, accumulating de novo mutations for up to 50 years on a known genetic background that is a unique linear mosaic of B and D haplotypes 2. We show that mice inheriting D haplotypes at a quantitative trait locus on chromosome 4 accumulate C>A germline mutations at a 50% higher rate than those inheriting B haplotypes, primarily owing to the activity of a C>A-dominated mutational signature known as SBS18. The B and D quantitative trait locus haplotypes encode different alleles of Mutyh, a DNA repair gene that underlies the heritable cancer predisposition syndrome that causes colorectal tumors with a high SBS18 mutation load 3,4. Both B and D Mutyh alleles are present in wild populations of Mus musculus domesticus, providing evidence that common genetic variation modulates germline mutagenesis in a model mammalian species.

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  • The contextual fear conditioning protocol used matches that previously used in the AD-BXD F1s.

    “The protocol used matches that previously used in the AD-BXD F1s10 83.”

    From Magnetic resonance microscopy maps widespread effects of Alzheimer’s disease on brain structures and behavior in mice (2026) · cites this paper as [83]

    The Methods section on construction of BXD lines describes breeding, and the Methods section on whole-genome sequencing describes tissue collection and genetic analysis. Neither describes contextual fear conditioning or compares its protocol with one used in AD-BXD F1s (searched: “contextual fear conditioning AD-BXD F1s” and “fear conditioning protocol behavioral testing Alzheimer BXD F1”). (LLM, conf=0.75)

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Authors
Sasani, T. A., Ashbrook, D. G., Beichman, A. C., Lu, L., Palmer, A. A., Williams, R. W., Pritchard, J. K., & Harris, K.
Affiliations
  • University of Washington (US)
  • University of Tennessee Health Science Center (US)
  • University of California San Diego (US)
  • Stanford University (US)
Corresponding author
Harris, Kelley
Venue
Nature
Published
2022-05-11
Volume
605
Issue
7910
Pages
497-502
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W4280525469
Cited by
64
References
54
Citations by year
2026: 7 · 2025: 11 · 2024: 11 · 2023: 24 · 2022: 6 · 2021: 5
FWCI
4.74
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Wellcome Trust
  • National Institutes of Health (NIH T32, NIH-R01, DA044223)
  • National Institute on Aging (T32AG066574)
  • National Institute on Drug Abuse (P30DA044223, DA044223, P50DA037844, U01DA051234)
  • National Human Genome Research Institute (R01HG008140, T32HG000035)
  • National Institute of General Medical Sciences (R01GM123489, R35GM133428)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
Keywords
germline mutagenesis, mutation rate, mutation spectrum, MUTYH, haplotypes, quantitative trait loci, DNA repair, natural genetic variation, Mus musculus domesticus, colorectal cancer predisposition
MeSH terms
Alleles, Animals, Haplotypes, Male, Mammals, Mice, Inbred C57BL, Mice, Inbred DBA, Mutation, Genetic Variation, Germ-Line Mutation, Quantitative Trait Loci, Mice

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