DNA polymerase switching;
DNA replication;
PCNA mono-ubiquitination;
translesion DNA synthesis;
CELL NUCLEAR ANTIGEN;
TRANSLESION SYNTHESIS;
BINDING DOMAINS;
SCHIZOSACCHAROMYCES-POMBE;
SACCHAROMYCES-CEREVISIAE;
MONOUBIQUITINATED PCNA;
GENOMIC INSTABILITY;
COMPLEX-FORMATION;
REPAIR PROTEINS;
SLIDING CLAMP;
D O I:
10.1016/j.jmb.2010.01.003
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
Translesion DNA synthesis is a mechanism of DNA damage tolerance, and mono-ubiquitination of proliferating cell nuclear antigen (PCNA) is considered to play a key role in regulating the switch from replicative to translesion DNA polymerases (pols). In this study, we analyzed effects of a replicative pol delta on PCNA mono-ubiquitination with the ubiquitin-conjugating enzyme and ligase UBE2A/HHR6A/RAD6A-RAD18. The results revealed that PCNA interacting with pol 8 is a better target for ubiquitination, and PCNA mono-ubiquitination could be coupled with DNA replication. Consequently, we could reconstitute replication-coupled switching between pol delta and a translesion pol, pol eta, on an ultraviolet-light-irradiated template. With this system, we obtained direct evidence that polymerase switching reactions are stimulated by mono-ubiquitination of PCNA, depending on a function of the ubiquitin binding zinc finger domain of pol eta. This study provides a framework for detailed analyses of molecular mechanisms of human pol switching and regulation of translesion DNA synthesis. (C) 2010 Elsevier Ltd. All rights reserved.
机构:
New York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USANew York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USA
Zhao, Hong
Zhang, Sufang
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机构:
New York Med Coll, Dept Biochem & Mol Biol, Valhalla, NY 10595 USANew York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USA
Zhang, Sufang
Xu, Dazhong
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New York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USANew York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USA
Xu, Dazhong
Lee, Marietta Y. W. T.
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New York Med Coll, Dept Biochem & Mol Biol, Valhalla, NY 10595 USANew York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USA
Lee, Marietta Y. W. T.
Zhang, Zhongtao
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New York Med Coll, Dept Biochem & Mol Biol, Valhalla, NY 10595 USANew York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USA
Zhang, Zhongtao
Lee, Ernest Y. C.
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New York Med Coll, Dept Biochem & Mol Biol, Valhalla, NY 10595 USANew York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USA
Lee, Ernest Y. C.
Darzynkiewicz, Zbigniew
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机构:
New York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USANew York Med Coll, Dept Pathol, Brander Canc Res Inst, Valhalla, NY 10595 USA