Pso2/Snm1 plays a key role in the repair of DNA interstrand cross-links in yeast. Human cells possess three orthologues of Pso2; SNM1A, SNM1B/Apollo and SNM1C/Artemis. Studies using mammalian cells disrupted or depleted for these genes have yielded equivocal evidence that any of these is a true functional homologues of the yeast gene. Here we show that ectopic expression of only one of the three human orthologues, hSNM1A, effectively suppresses the sensitivity of yeast pso2 (snm1) disruptants to cross-linking agents. Two other phenotypes of the pso2 mutants are also partially rescued by ectopic expression of hSNM1A, namely the double-strand repair break defect observed during cross-link processing in pso2 cells, as well as the spontaneous intrachromatid recombination defect of pso2 msh2 double mutants. Finally, we show that recombinant hSNM1A is a 5'-exonuclease, as also recently reported for the yeast Pso2 protein. Together our data suggest that hSnm1A is a functional homologue of yeast Pso2/Snm1.
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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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