rad54 mutants of the yeast Saccharomyces cerevisiae are extremely X-ray sensitive and have decreased mitotic recombination frequencies because of a defect in double-strand break repair. A RAD54 homolog was disrupted in the chicken B cell line DT40, which undergoes immunoglobulin gene conversion and exhibits unusually high ratios of targeted to random integration after DNA transfection. Homozygous RAD54-/- mutant clones were highly X-ray sensitive compared to wildtype cells. The rate of immunoglobulin gene conversion was 6- to 8-fold reduced, and the frequency of targeted integration was at least two orders of magnitude decreased in the mutant clones. Reexpression of the RAD54 cDNA restored radiation resistance and targeted integration activity. The reported phenotype provides the first genetic evidence of a link between double-strand break repair and homologous recombination in vertebrate cells.
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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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