Rxivist combines preprints from bioRxiv with data from Twitter to help you find the papers being discussed in your field. Currently indexing 70,230 bioRxiv papers from 306,635 authors.
Population sequencing data reveal a compendium of mutational processes in human germline
Vladimir B. Seplyarskiy,
Ryan J. McGinty,
Jakob M. Goldmann,
Yii-Der Ida Chen,
NHLBI Trans-Omics for Precision Medicine (TOPMed),
TOPMed Population Genetics Working Group,
Peter V. Kharchenko,
Posted 11 Jan 2020
bioRxiv DOI: 10.1101/2020.01.10.893024
Posted 11 Jan 2020
Mechanistic processes underlying human germline mutations remain largely unknown. Variation in mutation rate and spectra along the genome is informative about the biological mechanisms. We statistically decompose this variation into separate processes using a blind source separation technique. The analysis of a large-scale whole genome sequencing dataset (TOPMed) reveals nine processes that explain the variation in mutation properties between loci. Seven of these processes lend themselves to a biological interpretation. One process is driven by bulky DNA lesions that resolve asymmetrically with respect to transcription and replication. Two processes independently track direction of replication fork and replication timing. We identify a mutagenic effect of active demethylation primarily acting in regulatory regions. We also demonstrate that a recently discovered mutagenic process specific to oocytes can be localized solely from population sequencing data. This process is spread across all chromosomes and is highly asymmetric with respect to the direction of transcription, suggesting a major role of DNA damage.
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