Journal
CURRENT OPINION IN GENETICS & DEVELOPMENT
Volume 23, Issue 3, Pages 271-279Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.gde.2013.05.007
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Funding
- NIH [GM084242, GM080600]
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Break-induced replication (BIR) is the pathway of homologous recombination (HR) conserved from phages to eukaryotes that serves to repair DNA breaks that have only one end. BIR contributes to the repair of broken replication forks and allows telomere lengthening in the absence of telomerase. Nonallelic BIR may lead to translocations and other chromosomal rearrangements. In addition, BIR initiated at sites of microhomology can generate copy number variations (CNVs) and complex chromosomal changes. The level of mutagenesis associated with DNA synthesis in BIR is significantly higher than during normal replication. These features make BIR a likely pathway to promote bursts of genetic changes that fuel cancer progression and evolution.
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