Title
Analyses of the yeast Rad51 recombinase A265V mutant reveal different in vivo roles of Swi2-like factors
Date Issued
01 August 2011
Access level
open access
Resource Type
journal article
Author(s)
Chi P.
Kwon Y.
Visnapuu M.
Lam I.
Zheng X.
Epshtein A.
Greene E.
Sung P.
Klein H.
Universidad de Nueva York
Publisher(s)
Oxford University Press
Abstract
The Saccharomyces cerevisiae Swi2-like factors Rad54 and Rdh54 play multifaceted roles in homologous recombination via their DNA translocase activity. Aside from promoting Rad51-mediated DNA strand invasion of a partner chromatid, Rad54 and Rdh54 can remove Rad51 from duplex DNA for intracellular recycling. Although the in vitro properties of the two proteins are similar, differences between the phenotypes of the null allele mutants suggest that they play different roles in vivo. Through the isolation of a novel RAD51 allele encoding a protein with reduced affinity for DNA, we provide evidence that Rad54 and Rdh54 have different in vivo interactions with Rad51. The mutant Rad51 forms a complex on duplex DNA that is more susceptible to dissociation by Rdh54. This Rad51 variant distinguishes the in vivo functions of Rad54 and Rdh54, leading to the conclusion that two translocases remove Rad51 from different substrates in vivo. Additionally, we show that a third Swi2-like factor, Uls1, contributes toward Rad51 clearance from chromatin in the absence of Rad54 and Rdh54, and define a hierarchy of action of the Swi2-like translocases for chromosome damage repair. © 2011 The Author(s).
Start page
6511
End page
6522
Volume
39
Issue
15
Language
English
OCDE Knowledge area
Biología celular, Microbiología Bioquímica, Biología molecular Genética, Herencia
Scopus EID
2-s2.0-80055086479
PubMed ID
Source
Nucleic Acids Research
ISSN of the container
1362-4962
Sponsor(s)
National Institutes of Health (ES007061 to P.S., GM053738 to H.L.K., GM074739 to E.C.G., GM057814 to P.S. and CA146940 to H.L.K, E.C.G. and P.S.). Funding for open access charge: NIH GM053738.
Sources of information: Directorio de Producción Científica Scopus