Nitric oxide (NO) has been found to inhibit the actions of the transmembrane metal reductase Fre1 in the yeast Saccharomyces cerevisiae. This membrane-spanning heme protein is homologous to the gp91(PHOX) protein of the NADPH oxidase enzyme complex and is responsible for reducing extracellular oxidized metals (i.e., ferric and cupric ions) before high-affinity uptake. Consistent with its role in metal metabolism, inhibition of Fre1 by NO also inhibited yeast growth in low-iron medium. Inhibition by NO was found to be O(2)-dependent and irreversible. Further examination of the chemistry responsible for activity loss shows that the generation of N(2)O(3) via NO-O(2) chemistry was responsible for the activity loss, possibly via nitrosation of the protein followed by loss of the heme prosthetic group.
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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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