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- W2885398940 abstract "RNA is a key player in the cellular central dogma, including RNA transcription and protein synthesis. However, it is unknown whether RNA can directly interfere with DNA synthesis. Recently, we have found in vitro that while binding to DNA polymerase nonspecifically, RNA can transform DNA polymerase to display a moonlighting activity, dNTP phosphatase, in turn interfering with DNA synthesis. This phosphatase activity removes the γ-phosphate from dNTPs (generating dNDPs) and subsequently removes the β-phosphate from the formed dNDPs (generating dNMPs), confirmed by the noncleavable α,β-CH2-dGTP and β,γ-CH2-dGTP analogues. We also found that dGTP is the best substrate for the phosphatase, and the dNTP phosphatase activity is sensitive to the reaction medium. In addition, we have revealed that RNA can tune the activity of closely related proteins and give rise to new catalytic functions with subtle differences. Moreover, we have demonstrated in vitro that at the lower dNTP level, this phosphatase can directly inhibit DNA synthesis by dNTP depletion, though the phosphatase activity is 690-fold slower than the polymerase activity. Our observation in vitro suggests a plausible strategy for RNA to directly interfere with DNA polymerase and DNA synthesis in vivo." @default.
- W2885398940 created "2018-08-22" @default.
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- W2885398940 date "2018-07-30" @default.
- W2885398940 modified "2023-10-14" @default.
- W2885398940 title "Moonlighting Phosphatase Activity of Klenow DNA Polymerase in the Presence of RNA" @default.
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- W2885398940 doi "https://doi.org/10.1021/acs.biochem.8b00688" @default.
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