Saccharomyces cerevisiae encodes six genes, MSH1-6, which encode proteins related to the bacterial MutS protein. In this study the role of MSH2, MSH3, and MSH6 in mismatch repair has been examined by measuring the rate of accumulating mutations and mutation spectrum in strains containing different combinations of msh2, msh3, and msh6 mutations and by studying the physical interaction between the MSH2 protein and the MSH3 and MSH6 proteins. The results indicate that S. cerevisiae has two pathways of MSH2-dependent mismatch repair: one that recognized single-base mispairs and requires MSH2 and MSH6, and a second that recognizes insertion/deletion mispairs and requires a combination of either MSH2 and MSH6 or MSH2 and MSH3. The redundancy of MSH3 and MSH6 explains the greater prevalence of hmsh2 mutations in HNPCC families and suggests how the role of hmsh3 and hmsh6 mutations in cancer susceptibility could be analyzed.
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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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