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- W2017079820 abstract "MutS and UvrD proteins individually stimulate Escherichia coli exonuclease VII activity on blunt-ended short duplex DNA substrates. Stimulation by both proteins is ATP-dependent but not mismatch-specific and is not accompanied by apparent strand separation. Under similar conditions, MutS and UvrD proteins in fact confer resistance to exonuclease VII action on ssDNA targets, thereby implying that a novel state of a double-stranded DNA intermediate, which we term a destabilized duplex, is involved in exonuclease-mediated strand degradation. We find that DNA strands in such a destabilized duplex can be displaced by the challenge of a molar excess of homologous single- and double-stranded DNA targets, in trans. Such an action of the UvrD protein is ATP-dependent. We discuss these results in relation to the (i) directional excision repair of E. coli MMR, (ii) downregulation of repeat deletions by exonucleases during replication slippage, and (iii) the fork reversal function of UvrD at stalled replication forks." @default.
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- W2017079820 date "2009-07-30" @default.
- W2017079820 modified "2023-10-14" @default.
- W2017079820 title "MutS and UvrD Proteins Stimulate Exonuclease Action: Insights into Exonuclease-Mediated Strand Repair" @default.
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- W2017079820 doi "https://doi.org/10.1021/bi8020313" @default.
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