Coordination of DNA damage tolerance mechanisms with cell cycle progression in fission yeast.
Coordination of DNA damage tolerance mechanisms with cell cycle progression in fission yeast.
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DOI:
10.1080/15384101.2015.1121353
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Kelly TJ
中科院分区:
文献类型:
--
作者:
Callegari AJ;Kelly TJ
DNA damage tolerance (DDT) mechanisms allow cells to synthesize a new DNA strand when the template is damaged. Many mutations resulting from DNA damage in eukaryotes are generated during DDT when cells use the mutagenic translesion polymerases, Rev1 and Polζ, rather than mechanisms with higher fidelity. The coordination among DDT mechanisms is not well understood. We used live-cell imaging to study the function of DDT mechanisms throughout the cell cycle of the fission yeast Schizosaccharomyces pombe. We report that checkpoint-dependent mitotic delay provides a cellular mechanism to ensure the completion of high fidelity DDT, largely by homology-directed repair (HDR). DDT by mutagenic polymerases is suppressed during the checkpoint delay by a mechanism dependent on Rad51 recombinase. When cells pass the G2/M checkpoint and can no longer delay mitosis, they completely lose the capacity for HDR and simultaneously exhibit a requirement for Rev1 and Polζ. Thus, DDT is coordinated with the checkpoint response so that the activity of mutagenic polymerases is confined to a vulnerable period of the cell cycle when checkpoint delay and HDR are not possible.
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影响因子:
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DOI:
10.1073/pnas.1003449107
发表时间:
2010-05-04
影响因子:
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作者:
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DOI:
10.1534/g3.114.011346
发表时间:
2014-05-28
期刊:
G3 (Bethesda, Md.)
影响因子:
--
作者:
Ding L;Forsburg SL
通讯作者:
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