Conservative amino acid substitutions were introduced into the proposed effector regions of both mammalian Ha-ras (residues 32 to 40) and Saccharomyces cerevisiae RAS2 (residues 39 to 47) proteins. The RAS2[Ser 42] protein had reduced biological function in the yeast S. cerevisiae. A S. cerevisiae strain with a second-site suppressor mutation, SSR2-1, was isolated which could grow on nonfermentable carbon sources when the endogenous RAS2 protein was replaced by the RAS2[Ser 42] protein. The SSR2-1 mutation was mapped to the structural gene for adenylate cyclase (CYR1), and the gene containing SSR2-1 was cloned and sequenced. SSR2-1 corresponded to a point mutation that would create an amino acid substitution of a tyrosine residue for an aspartate residue at position 1547. The SSR2-1 gene encodes an adenylate cyclase that is dependent on ras proteins for activity, but is stimulated by Ha-ras and RAS2 mutant proteins that are unable to stimulate wild-type adenylate cyclase.
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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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