Strains of Saccharomyces cerevisiae that express either the wild type or the amyotrophic lateral sclerosis-associated mutant human copper-zinc superoxide dismutase (SOD1) proteins A4V and G93A, respectively, in a yeast SOD1-deficient parent strain were used to investigate the hypothesis that expression of a mutant SOD1 protein causes deficient mitochondrial electron transport as a possible mechanism for disease induction. Mitochondria isolated from the wild type SOD1-expressing yeast were identical to mitochondria from the parent strain in heme content and activities of complexes II, III, and IV. Mitochondria isolated from the A4V-expressing yeast had decreased rates of electron transport in complexes II+III, III, and IV and corresponding decreases in hemes b, c-c1, and a-a3 content compared to mitochondria from wild type human SOD1-expressing yeast. Mitochondria isolated from G93A-expressing yeast had decreased rates of electron transport in complex IV and probably in complex II with a corresponding decrease in heme a-a3 content. These results suggest that mutant SOD1-expression causes defective electron transport complex assembly and that the yeast system will provide an excellent model for the study of the mechanism of mutant SOD1-induced mitochondrial electron transport defects.
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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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