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• W3141367062 abstract "Abstract Distinct mutation signatures arise from environmental exposures and/or from defects in metabolic pathways that promote genome stability. The presence of a particular mutation signature can therefore predict the underlying mechanism of mutagenesis. These insults to the genome often alter dNTP pools, which itself impacts replication fidelity. Therefore, the impact of altered dNTP pools should be considered when making mechanistic predictions based on mutation signatures. We developed a targeted deep-sequencing approach on the CAN1 gene in Saccharomyces cerevisiae to define information-rich mutational profiles associated with distinct rnr1 backgrounds. Mutations in the activity and selectivity sites of rnr1 lead to elevated and/or unbalanced dNTP levels, which compromises replication fidelity and increases mutation rates. The mutation spectra of rnr1Y285F and rnr1Y285A alleles were characterized previously; our analysis was consistent with this prior work but the sequencing depth achieved in our study allowed a significantly more robust and nuanced computational analysis of the variants observed, generating profiles that integrated information about mutation spectra, position effects, and sequence context. This approach revealed previously unidentified, genotype-specific mutation profiles in the presence of even modest changes in dNTP pools. Furthermore, we identified broader sequence contexts and nucleotide motifs that influenced variant profiles in different rnr1 backgrounds, which allowed specific mechanistic predictions about the impact of altered dNTP pools on replication fidelity." @default.
• W3141367062 created "2021-04-13" @default.
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• W3141367062 date "2021-03-30" @default.
• W3141367062 modified "2023-10-16" @default.
• W3141367062 title "A selection-based next generation sequencing approach to develop robust, genotype-specific mutation profiles in <i>Saccharomyces cerevisiae</i>" @default.
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• W3141367062 doi "https://doi.org/10.1093/g3journal/jkab099" @default.
• W3141367062 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8495734" @default.
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• W3141367062 hasPublicationYear "2021" @default.
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