A yeast open reading frame sharing homology with the two known yeast Rab GTPase-activating proteins (GAPs), Gyp6p and Gyp7p, was found in a data base search. We have named the gene containing this open reading frame GYP1. Recombinant Gyp1p showed GAP activity on Sec4p, increasing both its steady-state rate and single turnover GTPase activity. Gyp1p also stimulated the GTPase activity of several other yeast Rab proteins including Ypt1p, Ypt7p, and Ypt51p but showed no GAP activity on Ypt6p and Ypt32p. Deletion of the GYP1 gene or overexpression of Gyp1p did not alter the growth rate of yeast. However, overexpression of Gyp1p was inhibitory in combination with a subset of secretory mutants including sec4-8 and several ypt1 mutants. This effect is probably due to the increase in GAP activity, which can be observed in a lysate from cells overexpressing Gyp1p. The finding that yeast Rab GAPs share homology with proteins in other species, such as Caenorhabditis elegans and human, suggests the existence of a conserved Rab GAP family.
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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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