Mismatch repair, but not heteroduplex rejection, is temporally coupled to DNA replication.
Mismatch repair, but not heteroduplex rejection, is temporally coupled to DNA replication.
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DOI:
10.1126/science.1210770
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发表时间:
2011-12-23
期刊:
影响因子:
--
通讯作者:
Kolodner RD
中科院分区:
文献类型:
--
作者:
Hombauer H;Srivatsan A;Putnam CD;Kolodner RD
In eukaryotes, it is unknown if mismatch repair (MMR) is temporally coupled to DNA replication and how strand-specific MMR is directed. Here we fused Saccharomyces cerevisiae MSH6 with cyclins to restrict the availability of the Msh2-Msh6 mismatch recognition complex to either S-phase or G2/M. The Msh6-S cyclin fusion was proficient for suppressing mutations at three loci that replicate at mid-S-phase, whereas the Msh6-G2/M cyclin fusion was defective. However, the Msh6-G2/M cyclin fusion was functional for MMR at a very late-replicating region of the genome. In contrast, the heteroduplex rejection function of MMR during recombination was partially functional during both S-phase and G2/M. These results indicate a temporal coupling of MMR, but not heteroduplex rejection, to DNA replication.
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