Saccharomyces cerevisiae RAD51 gene is required for genetic recombination and recombinational repair of DNA strand breaks. Rad51 protein has a DNA-dependent ATPase activity, and it catalyzes ATP-dependent pairing and strand exchange between homologous DNA molecules. We show here that the rad51 Arg-191 protein, which is devoid of ATPase activity, mediates the pairing and strand exchange reaction upon binding ATP. In addition, the wild type Rad51 protein can catalyze pairing and strand exchange in the presence of the nonhydrolyzable ATP analogues adenylyl-imidodiphosphate and adenosine 5'-O-thiotriphosphate. Thus, homologous pairing and the unidirectional transfer of greater than 5 kilobases of DNA can occur efficiently without the need for nucleotide hydrolysis. Consistent with the results from the biochemical analyses, expression of the rad51 Arg-191 protein in a rad51 null mutant confers normal cellular resistance to the DNA damaging agent methylmethane sulfonate, suggesting that nucleotide binding by Rad51 is sufficient for biological function.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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