Please use this identifier to cite or link to this item: https://doi.org/10.1093/nar/gks1162
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dc.titleForce and ATP hydrolysis dependent regulation of RecA nucleoprotein filament by single-stranded DNA binding protein
dc.contributor.authorFu, H.
dc.contributor.authorLe, S.
dc.contributor.authorChen, H.
dc.contributor.authorMuniyappa, K.
dc.contributor.authorYan, J.
dc.date.accessioned2014-11-28T09:12:21Z
dc.date.available2014-11-28T09:12:21Z
dc.date.issued2013-01
dc.identifier.citationFu, H., Le, S., Chen, H., Muniyappa, K., Yan, J. (2013-01). Force and ATP hydrolysis dependent regulation of RecA nucleoprotein filament by single-stranded DNA binding protein. Nucleic Acids Research 41 (2) : 924-932. ScholarBank@NUS Repository. https://doi.org/10.1093/nar/gks1162
dc.identifier.issn03051048
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/113127
dc.description.abstractIn Escherichia coli, the filament of RecA formed on single-stranded DNA (ssDNA) is essential for recombinational DNA repair. Although ssDNA-binding protein (SSB) plays a complicated role in RecA reactions in vivo, much of our understanding of the mechanism is based on RecA binding directly to ssDNA. Here we investigate the role of SSB in the regulation of RecA polymerization on ssDNA, based on the differential force responses of a single 576-nucleotide-long ssDNA associated with RecA and SSB. We find that SSB outcompetes higher concentrations of RecA, resulting in inhibition of RecA nucleation. In addition, we find that pre-formed RecA filaments de-polymerize at low force in an ATP hydrolysis-and SSB-dependent manner. At higher forces, re-polymerization takes place, which displaces SSB from ssDNA. These findings provide a physical picture of the competition between RecA and SSB under tension on the scale of the entire nucleoprotein SSB array, which have broad biological implications particularly with regard to competitive molecular binding. © 2012 The Author(s).
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentMECHANOBIOLOGY INSTITUTE
dc.contributor.departmentPHYSICS
dc.description.doi10.1093/nar/gks1162
dc.description.sourcetitleNucleic Acids Research
dc.description.volume41
dc.description.issue2
dc.description.page924-932
dc.description.codenNARHA
dc.identifier.isiut000314121100028
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