To isolate Saccharomyces cerevisiae mutants defective in recombinational DNA repair, we constructed a strain that contains duplicated ura3 alleles that flank LEU2 and ADE5 genes at the ura3 locus on chromosome V. When a HO endonuclease cleavage site is located within one of the ura3 alleles, Ura+ recombination is increased over 100-fold in wild-type strains following HO induction from the GAL1, 10 promoter. This strain was used to screen for mutants that exhibited reduced levels of HO-induced intrachromosomal recombination without significantly affecting the spontaneous frequency of Ura+ recombination. One of the mutations isolated through this screen was found to affect the essential gene CDC1. This mutation, cdc1-100, completely eliminated HO-induced Ura+ recombination yet maintained both spontaneous preinduced recombination levels and cell viability, cdc1-100 mutants were moderately sensitive to killing by methyl methanesulfonate and gamma irradiation. The effect of the cdc1-100 mutation on recombinational double-strand break repair indicates that a recombinationally silent mechanism other than sister chromatid exchange was responsible for the efficient repair of DNA double-strand breaks.
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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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