Subunit D of vacuolar H(+)-ATPase (V-ATPase) from bovine chromaffin granules was subjected to partial proteolysis and amino acid sequencing. A cDNA encoding this subunit was isolated and sequenced. The predicted open reading frame encodes a protein of 247 amino acids with a calculated molecular weight of 28,336. Northern blot analysis revealed an mRNA distribution with higher transcript amounts in tissues that are active in secretion. A homologous gene was identified as open reading frame 11 in chromosome V of Saccharomyces cerevisiae. The two proteins exhibit 55% identity with several conservative replacements. Interruption of the yeast gene, denoted as VMA8, resulted in the null mutant delta vma8::URA3 that, like all the other V-ATPase null mutants, did not grow on medium buffered at pH 7.5 and showed no accumulation of quinacrine into their vacuoles. Transformation of the null mutant with a plasmid containing the VMA8 gene restored the wild-type phenotype. This supports the conclusion that subunit D is an integral subunit of the catalytic sector of V-ATPase and its structural analysis suggests analogy to the gamma subunit of F-ATPases.
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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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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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