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FEMS Yeast Res. 2016 Sep;16(6). pii: fow071. Epub 2016 Aug 28.

Understanding how mismatch repair proteins participate in the repair/anti-recombination decision.

Author information

1
Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853-2703, USA.
2
Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853-2703, USA eea3@cornell.edu.

Abstract

Mismatch repair (MMR) systems correct DNA mismatches that result from DNA polymerase misincorporation errors. Mismatches also appear in heteroduplex DNA intermediates formed during recombination between nearly identical sequences, and can be corrected by MMR or removed through an unwinding mechanism, known as anti-recombination or heteroduplex rejection. We review studies, primarily in baker's yeast, which support how specific factors can regulate the MMR/anti-recombination decision. Based on recent advances, we present models for how DNA structure, relative amounts of key repair proteins, the timely localization of repair proteins to DNA substrates and epigenetic marks can modulate this critical decision.

KEYWORDS:

DNA mismatch repair; Msh2; Msh3; Msh6; chromatin marks; heteroduplex rejection

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