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- W4281715908 abstract "In eukaryotes, the origin recognition complex (ORC) is required for the initiation of DNA replication. The smallest subunit of ORC, Orc6, is essential for prereplication complex (pre-RC) assembly and cell viability in yeast and for cytokinesis in metazoans. However, unlike other ORC components, the role of human Orc6 in replication remains to be resolved. Here, we identify an unexpected role for hOrc6, which is to promote S-phase progression after pre-RC assembly and DNA damage response. Orc6 localizes at the replication fork and is an accessory factor of the mismatch repair (MMR) complex. In response to oxidative damage during S phase, often repaired by MMR, Orc6 facilitates MMR complex assembly and activity, without which the checkpoint signaling is abrogated. Mechanistically, Orc6 directly binds to MutSα and enhances the chromatin-association of MutLα, thus enabling efficient MMR. Based on this, we conclude that hOrc6 plays a fundamental role in genome surveillance during S phase." @default.
- W4281715908 created "2022-06-13" @default.
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- W4281715908 date "2022-05-27" @default.
- W4281715908 modified "2023-10-01" @default.
- W4281715908 title "Orc6 is a component of the replication fork and enables efficient mismatch repair" @default.
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- W4281715908 doi "https://doi.org/10.1073/pnas.2121406119" @default.
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