Mutant alleles of SEC4, an essential gene required for the final stage of secretion in yeast, have been generated by in vitro mutagenesis. Deletion of the two cysteine residues at the C terminus of the protein results in a soluble non-functional protein, indicating that those two residues are required for normal localization of Sec4p to secretory vesicles and the plasma membrane. A mutant allele of SEC4 generated to mimic an activated, transforming allele of H-ras, as predicted, does not bind GTP. The presence of this allele in cells containing wild-type SEC4 causes a secretory defect and the accumulation of secretory vesicles. The results of genetic studies indicate that this allele behaves as a dominant loss of function mutant and as such prevents wild-type protein from functioning properly. We propose a model in which Sec4p cycles between an active and an inactive state in order to mediate the fusion of vesicles to the plasma membrane.
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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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