Saccharomyces cerevisiae pet mutants, of complementation group G115, are deficient in mitochondrial ATPase and have properties indicative of defective F1. In this study we show that C287/LU1, a mutant belonging to group G115, is complemented by the yeast nuclear ATP3 gene coding for the gamma-subunit of the mitochondrial F1-ATPase. The amino-terminal sequence of the mature gamma-subunit matches the sequence encoded by ATP3 starting with the 34th amino acid confirming the identity of the gene, and earlier evidence indicating that this F1 component is synthesized as a precursor with a long amino-terminal extension. The properties of the mitochondrial ATPase have been studied in C287/LU1 with an Ala273-->Val substitution in the carboxyl-terminal region of the gamma-subunit and in W303 delta ATP3, a mutant lacking the gamma-subunit as a result of a deletion in ATP3. Both strains have negligible ATPase activity but near normal concentrations of the alpha- and beta-subunits of F1. In W303 delta ATP3, the subunits do not form a stable F1 oligomer nor are they firmly associated with F0. This is not true of C287/LU1, which was found to assemble an F1-F0 complex. These data indicate that the yeast gamma-subunit has dual functions, one in catalysis of ATP hydrolysis/synthesis and the second in assembly/stability of F1.
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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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