In Saccharomyces cerevisiae a nuclear recessive mutation, lpd1, which simultaneously abolishes the activities of lipoamide dehydrogenase, 2-oxoglutarate dehydrogenase and pyruvate dehydrogenase has been identified. Strains carrying this mutation can grow on glucose or poorly on ethanol, but are unable to grow on media with glycerol or acetate as carbon source. The mutation does not prevent the formation of other tricarboxylic acid cycle enzymes such as fumarase, NAD+-linked isocitrate dehydrogenase or succinate-cytochrome c oxidoreductase, but these are produced at about 50%-70% of the wild-type levels. The mutation probably affects the structural gene for lipoamide dehydrogenase since the amount of this enzyme in the cell is subject to a gene dosage effect; heterozygous lpd1 diploids produce half the amount of a homozygous wild-type strain. Moreover, a yeast sequence complementing this mutation when present in the cell on a multicopy plasmid leads to marked overproduction of lipoamide dehydrogenase. Homozygous lpd1 diploids were unable to sporulate indicating that some lipoamide dehydrogenase activity is essential for sporulation to occur on acetate.
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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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