The absence of SOD1 in yeast has been found to result in inactivation of Lys4p. This [4Fe-4S]-containing dehydratase is in the pathway of biosynthesis of lysine, hence the oxygen-dependent lysine auxotrophy seen in this case. O(2)(-) is known to oxidize and thus destabilize the [Fe-4S] clusters of dehydratases; hence, this would make perfect sense were it not for the fact that SOD1 localizes to the cytosol and the intermembrane space of mitochondria, whereas Lys4p localizes to the mitochondrial matrix. How could SOD1 in one compartment protect against O(2)(-) attack in a different compartment? We suggest that the relatively high levels of O(2)(-) in the cytosol and intermembrane space of the SOD1 mutant may react with endogenous NO, forming HOONO that can diffuse into the mitochondrial matrix and there inactivate Lys4p and other [4Fe-4S]-containing dehydratases.
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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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