In the yeast Saccharomyces cerevisiae, the activation of adenylate cyclase requires the products of the RAS genes and of CDC25. We isolated several dominant extragenic suppressors of the yeast cdc25 mutation. They did not suppress a thermosensitive allele of the adenylate cyclase gene (CDC35). One of these suppressors was a mutated RAS2 gene in which the transition C/G----T/A at position 455 resulted in replacement of threonine 152 by isoleucine in the protein. The same mutation in a v-Ha-ras gene reduces the affinity of p21 for guanine nucleotides (L.A. Feig, B. Pan, T.M. Roberts, and G.M. Cooper, Proc. Natl. Acad. Sci. USA 83:4607-4611, 1986). These results support a model in which the CDC25 gene product is the GDP-GTP exchange factor regulating the activity of the RAS gene product.
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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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