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- W2754965820 abstract "Abstract Embryonic stem (ES) cells require homologous recombination (HR) to cope with genomic instability caused during self-renewal. Here, we report expression dynamics and localization of endogenous HR factors in DNA break repair of ES cells. In addition, we analyzed gene expression patterns of HR-related factors at the transcript level with RNA-sequencing experiments. We showed that ES cells constitutively expressed diverse HR proteins throughout the cell cycle and that HR protein expression was not significantly changed even in the DNA damaging conditions. We further analyzed that depleting Rad51 resulted in the accumulation of larger single-stranded DNA (ssDNA) gaps, but did not perturb DNA replication, indicating that ES cells were able to enter the G2-phase in the presence of unrepaired DNA gaps, consistent with the possibility that post-replication repair helps avoid stalling at the G2/M checkpoint. Interestingly, caffeine treatment inhibited the formation of Rad51 or Rad54 foci, but not the formation of γH2AX and Exo1 foci, which led to incomplete HR in ssDNA, thus increasing DNA damage sensitivity. Our results suggested that ES cells possess conserved HR-promoting machinery to ensure effective recruitment of the HR proteins to DNA breaks, thereby driving proper chromosome duplication and cell cycle progression in ES cells." @default.
- W2754965820 created "2017-09-25" @default.
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- W2754965820 date "2017-09-14" @default.
- W2754965820 modified "2023-10-03" @default.
- W2754965820 title "The Homologous Recombination Machinery Orchestrates Post-replication DNA Repair During Self-renewal of Mouse Embryonic Stem Cells" @default.
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- W2754965820 doi "https://doi.org/10.1038/s41598-017-11951-1" @default.
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