All organisms have defense mechanisms to combat the deleterious effects of oxidative damage produced by reactive oxidative species (ROS). Although it is known that ROS play a major role in oxidative damage, increasing evidence reveals that ROS have wider cellular effects through their role in many signal transduction pathways. Here we have adapted a redox-regulated domain from the Yap1 transcription factor in Saccharomyces cerevisiae to function as a general trap for proteins that form cysteine sulfenic acid (Cys-SOH) in vivo. In response to H2O2, the Yap1 probe forms mixed disulfide bonds with a variety of proteins. The formation of these protein complexes is time dependent and peroxide concentration dependent. Disulfide-bonded complex formation can be attenuated by the addition of dimedone, a compound that specifically reacts with Cys-SOH, indicating the specificity of the probe toward Cys-SOH. An efficient one-step purification procedure was developed for proteins trapped by the Yap1 probe, and the constituents were identified by mass spectrometry. This methodology identified six proteins in Escherichia coli that contain redox-active cysteine residues known to form Cys-SOH as part of their catalytic cycle. The results suggest that the Yap1 probe is useful for identifying Cys-SOH-regulated proteins and can be employed in any genetically tractable organism to monitor transient Cys-SOH formation in vivo.
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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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