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• W3183449476 abstract "Abstract Polynucleotide kinase phosphatase (PNKP) has enzymatic activities as 3′ phosphatase and 5′ kinase of DNA ends to promote DNA ligation. Here, we show that PNKP is involved in progression of DNA replication through end-processing of Okazaki fragments (OFs). Cyclin-dependent kinases (CDKs) regulate phosphorylation on threonine 118 (T118) of PNKP, and which phosphorylation allows it to be recruited to OFs. Loss of PNKP and T118 phosphorylation significantly increased unligated OFs and high-speed DNA synthesis in replication forks, suggesting that PNKP T118 phosphorylation is required for OFs ligation for its maturation. Furthermore, phosphatase-dead PNKP also exhibited an accumulation of unligated OFs and high-speed DNA synthesis. Overall, our data suggested that CDK-mediated PNKP phosphorylation at T118 is important for its recruitment to OFs and PNKP subsequently promotes end-processing for OFs maturation for stable cell proliferation." @default.
• W3183449476 created "2021-08-02" @default.
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• W3183449476 date "2021-07-30" @default.
• W3183449476 modified "2023-09-23" @default.
• W3183449476 title "Phosphorylation of PNKP mediated by CDKs promotes end-processing of Okazaki fragments during DNA replication" @default.
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• W3183449476 doi "https://doi.org/10.1101/2021.07.29.452278" @default.
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