VAM7 gene function has shown to be required for proper morphogenesis of the vacuole in yeast. The DNA fragments that complemented the defective vacuolar morphology of the vam7-1 mutation were isolated from a yeast genomic library. An overlapping 2.5-kilobase BglII-HindIII region was found to be sufficient for complementation of the vam7-1 phenotype. This fragment was integrated at the chromosomal VAM7 locus, indicating that it contained an authentic VAM7 gene. On nucleotide sequencing of the VAM7 gene, an open reading frame of 948 base pairs, coding for a hydrophilic polypeptide of 316 amino acid residues, was identified. The deduced amino acid sequence of the carboxyl-terminal region of the VAM7 gene product has heptad repeats and shows potential ability to form a coiled-coil structure. Disruption of VAM7 was not lethal; cells with a disrupted VAM7 gene did not, however, have a prominent large vacuoles but rather numerous small compartments that accumulated the histochemical marker molecule of the vacuolar compartment. They contained mature forms of the vacuolar marker proteins carboxypeptidase Y and vacuolar glycoprotein vgp72. A mutant with both vam7 and vam5 null mutations was constructed and shown to have neither vacuolar structures stained with ade-related fluorochrome nor mature forms of vacuolar marker proteins. These findings suggested that the VAM7 gene product functions in the process of morphogenic assembly of the vacuolar compartment but is not involved in the protein sorting and delivery to the vacuole.
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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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