The single nuclear gene encoding the 14-kDa subunit VII of yeast ubiquinol:cytochrome c oxidoreductase has been inactivated by one-step gene disruption, as verified by Southern blot analysis and immunoblotting. The resulting mutant has no ubiquinol:cytochrome c oxidoreductase activity and is respiratory-deficient. Immunoblotting shows that cells lacking the 14-kDa protein, also have lowered steady-state levels of other subunits of complex III, the nuclear-encoded 11-kDa subunit VIII, the Rieske Fe-S protein and the mitochondrially encoded cytochrome b. No cytochrome b can be detected spectrally. The steady-state levels of the transcripts from genes encoding these proteins are not reduced, implying that the mutation exerts its pleiotropic effects at a post-transcriptional level. The residual amounts of subunits of complex III are recovered in the mutant mitochondria, suggesting that import is unaffected. The results strongly suggest that the 14-kDa protein plays an essential role in the biosynthesis of the complex, most probably at the level of assembly. Field-inversion gel electrophoresis was used to separate chromosomes of HR2 wild type and the (14-kDa-protein) degrees mutant, after which the gene encoding the 14-kDa protein was located on chromosome IV by Southern blot analysis.
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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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