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Orlando Scharer
유전체 항상성 연구단
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Sensing and Processing of DNA Interstrand Crosslinks by the Mismatch Repair Pathway

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Title
Sensing and Processing of DNA Interstrand Crosslinks by the Mismatch Repair Pathway
Author(s)
Niyo Kato; Yoshitaka Kawasoe; Hannah Williams; Elena Coates; Upasana Roy; Yuqian Shi; Lorena S. Beese; Orlando D. Scha¨rer; Hong Yan; Max E. Gottesman; Tatsuro S. Takahashi; Jean Gautier
Publication Date
2017-10
Journal
Cell Reports, v.21, no.5, pp.1375 - 1385
Publisher
Cell Press
Abstract
DNA interstrand crosslinks (ICLs) that are repaired in non-dividing cells must be recognized independently of replication-associated DNA unwinding. Using cell-free extracts from Xenopus eggs that support neither replication nor transcription, we establish that ICLs are recognized and processed by the mismatch repair (MMR) machinery. We find that ICL repair requires MutS alpha (MSH2-MSH6) and the mismatch recognition FXE motif in MSH6, strongly suggesting that MutS alpha functions as an ICL sensor. MutS alpha recruits MutL alpha and EXO1 to ICL lesions, and the catalytic activity of both these nucleases is essential for ICL repair. As anticipated for a DNA unwinding-independent recognition process, we demonstrate that least distorting ICLs fail to be recognized and repaired by the MMR machinery. This establishes that ICL structure is a critical determinant of repair efficiency outside of DNA replication. (c) 2017 The Authors.
URI
http://pr.ibs.re.kr/handle/8788114/4153
DOI
10.1016/j.celrep.2017.10.032
ISSN
2211-1247
Appears in Collections:
Center for Genomic Integrity(유전체 항상성 연구단) > Journal Papers (저널논문)
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