Redox reactions involving cysteine thiol-disulfide exchange are crucial for sensing intracellular levels of H(2)O(2). However, oxidation-sensitive dithiols are also sensitive to intracellular reducing agents, and disulfide bonds are thus transient. The yeast transcription factor Yap1 is activated by disulfide-induced structural changes in the nuclear export signal in a carboxy-terminal domain. We show herein that the activation of Yap1 by H(2)O(2) requires multistep formation of disulfide bonds. One disulfide bond forms within 15 s in an amino-terminal domain, and then disulfide bonds linking the two domains accumulate. The multiple interdomain disulfide bonds, which result in reduction-resistant Yap1, are required for transduction of the H(2)O(2) stress signal to induce the appropriate level and duration of specific transcription. Our results suggest both a mechanism wherein the H(2)O(2) levels might be sensed by Yap1 and the way in which the NADPH levels might be maintained by altering the redox status of Yap1.
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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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Evidence ID | Analyze ID | File | Description |
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