The Mre11 and Pso2 nucleases function in homologous recombination and interstrand cross-link (ICL) repair pathways, respectively, while the Exo1 nuclease is involved in homologous recombination and mismatch repair. Characterization of the sensitivity of single, double and triple mutants for these nucleases in Saccharomyces cerevisiae to various DNA damaging agents reveals complex interactions that depend on the type of DNA damage. The pso2 mutant is uniquely sensitive to agents that generate ICLs and mre11-H125N shows the highest sensitivity of the single mutants for ionizing radiation and methyl methane sulfonate. However, elimination of all three nucleases confers higher sensitivity to IR than any of the single or double mutant combinations indicating a high degree of redundancy and versatility in the response to DNA damage. In response to ICL agents, double-strand breaks are still formed in the triple nuclease mutant indicating that none of these nucleases are responsible for unhooking cross-links.
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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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