Sulfite-resistant and sulfite-sensitive mutants of Saccharomyces cerevisiae were isolated and characterized. Genetic analysis indicated that one and four genes were responsible for the resistant and sensitive responses, respectively, and suggested that defects in methionine and cysteine metabolism were not involved. Some resistant alleles, all of which were dominant, conferred greater resistance than others. Mutations conferring sensitivity were recessive and one co-segregated with impaired respiration. Two of the sensitive mutants exhibited cross-sensitivity to other metabolic inhibitors: sulfometuron methyl, cycloheximide, oligomycin, and antimycin A. A 50% glutathione deficiency in one sensitive mutant was not sufficient in itself to account for its sensitivity. Screening of other relevant mutants revealed that relative to wild-type, met8 and a thioredoxin null mutant are sensitive, and met3 and met14 mutants are not. Reduced production of extracellular acetaldehyde, a compound that detoxifies sulfite, was observed in three of the four sensitive mutants. However, acetaldehyde was also underproduced in the resistant mutant. Because sulfite is a reducing agent, cells were tested for coincident sensitivity or resistance to ascorbate, selenite, dithiothreitol, nitrite, thiosulfate, reduced glutathione, and cysteine. No consistent pattern of responses to these agents emerged, suggesting that the response to sulfite is not a simple function of redox potential.
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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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