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"The ATPase motif in RAD51D is required for resistance to DNA interstrand crosslinking agents and interaction with RAD51C." |
Gruver AM, Miller KA, Rajesh C, Smiraldo PG, Kaliyaperumal S, Balder R, Stiles KM, Albala JS, Pittman DL |
Published Nov. 1, 2005 in Mutagenesis volume 20 .
Pubmed ID: 16236763
Abstract:
| Homologous recombination (HR) is a mechanism for repairing DNA interstrand crosslinks and double-strand breaks. In mammals, HR requires the activities of the RAD51 family (RAD51, RAD51B, RAD51C, RAD51D, XRCC2, XRCC3 and DMC1), each of which contains conserved ATP binding sequences (Walker Motifs A and B). RAD51D is a DNA-stimulated ATPase that interacts directly with RAD51C and XRCC2. To test the hypothesis that ATP binding and hydrolysis by RAD51D are required for the repair of interstrand crosslinks, site-directed mutations in Walker Motif A were generated, and complementation studies were performed in Rad51d-deficient mouse embryonic fibroblasts. The K113R and K113A mutants demonstrated a respective 96 and 83% decrease in repair capacity relative to wild-type. Further examination of these mutants, by yeast two-hybrid analyses, revealed an 8-fold reduction in the ability to associate with RAD51C whereas interaction with XRCC2 was retained at a level similar to the S111T control. These cell-based studies are the first evidence that ATP binding and hydrolysis by RAD51D are required for efficient HR repair of DNA interstrand crosslinks. |
This publication refers to following REPAIRtoire entries:
| Genes |
Last modification of this entry: Oct. 6, 2010
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