Since the double Deltagrx1Deltagrx2 mutant is hypersensitive to selenite we decided to evaluate mechanisms underlying this phenomenon and establish the roles of other components of yeast glutaredoxin system, in particular glutaredoxin 5 in the selenite resistance. We found elevation in the intracellular and mitochondrial superoxide production in the Deltagrx1Deltagrx2 and Deltagrx5 mutants after Se(IV) treatment. The last effect was more pronounced for cells lacking the mitochondrial Grx5 protein. We also recorded selenite-induced increase in the peroxide production in all strains tested. Nonfermentable carbon sources, glycerol and ethanol, augmented selenite toxicity. Hypo- and anoxia protected against the harmful effects of Se(VI). Augmentation of the intracellular levels of two endogenous antioxidants, erythroascorbic acid and glutathione confers resistance to selenite. We recorded a strain-unspecific, selenite-mediated decrease in the level of acid-soluble thiols. Collectively, our data demonstrate that hypersensitivity to the Deltagrx1Deltagrx2 and Deltagrx5 disruptants to selenite is mediated by altered intracellular redox equilibrium.
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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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