Genomic Evidence for Elevated Mutation Rates in Highly Expressed Genes

Overview

Journal EMBO Rep

Specialty Molecular Biology

Date 2012 Nov 14

PMID 23146897

Citations 65

Authors

Chungoo Park

Wenfeng Qian

Jianzhi Zhang

Affiliations

Soon will be listed here.

Abstract

Reporter gene assays have demonstrated both transcription-associated mutagenesis (TAM) and transcription-coupled repair, but the net impact of transcription on mutation rate remains unclear, especially at the genomic scale. Using comparative genomics of related species as well as mutation accumulation lines, we show in yeast that the rate of point mutation in a gene increases with the expression level of the gene. Transcription induces mutagenesis on both DNA strands, indicating simultaneous actions of several TAM mechanisms. A significant positive correlation is also detected between the human germline mutation rate and expression level. These results indicate that transcription is overall mutagenic.

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