The op1 mutation in yeast is known to be due to a defect in the mitochondrial ADP/ATP translocator. Sequencing of the gene AAC2 revealed that the mutation resulted from a single base change that caused a replacement of arginine 97 by a histidine. The gene encoding AAC2 was also cloned and sequenced from an op1 revertant capable of growth on glycerol as a sole carbon source. Sequence analysis indicates that the reverted gene underwent rearrangement in which a portion of an unknown gene was used to repair the mutation. An oligonucleotide complementary to this insert was used to clone a previously unrecognized gene encoding ADP/ATP translocator in yeast. The newly discovered gene, AAC3, is homologous with the previously known genes AAC1 and AAC2. Gene disruption experiments suggest that AAC2 encodes the majority of the translocator. Expression of AAC1 and AAC2 required derepressed conditions whereas expression of AAC3 occurred almost exclusively under anaerobic conditions. Both the op1 mutant and the strain that contains an interrupted AAC2 were able to grow under anaerobic conditions, suggesting that AAC3 can replace the gene product of AAC2. Indeed, when cloned into multicopy plasmid, AAC3 was able to replace the disrupted AAC2 in the JLY-73 strain. The concomitant disruption of the AAC2 and AAC3, however, results in arrest of cell growth under conditions of low oxygen tension. The discovery of a third gene encoding ADP/ATP translocator helps to clarify certain characteristics of op1 mutants which could not be resolved in the past.
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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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