The GPA1 gene of Saccharomyces cerevisiae encodes a protein that is highly homologous to the alpha subunit of mammalian hetrotrimeric G proteins and is essential for haploid cell growth. A mutation of the GPA1 protein, GPA1Val-50, in which Gly-50 was replaced by valine, could complement the growth defect of a GPA1 disruption, gpal::HIS3. However, cells with gpa1::HIS3 expressing the GPA1Val-50 protein were supersensitive to alpha-factor in a short-term incubation but resumed growth after long-term incubation even after exposure to high concentrations of alpha-factor. The former phenotype associated with GPA1Val-50 is recessive, and the latter phenotype is dominant to GPA1+. The supersensitivity of GPA1Val-50 to alpha-factor was dependent on STE2 and STE4, which demonstrates that this GPA1Val-50-produced phenotype requires the mating-factor receptor and the beta subunit of the G protein. The double mutant of sst2-1 GPA1Val-50 recovered from division arrest, which suggested that SST2 is not required for recovery of the GPA1Val-50 mutant.
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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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