The alkaline denaturation of cytochrome c peroxidase and apocytochrome c peroxidase was investigated by analytical ultracentrifugation, gel-filtration chromatography, and circular dichroism. The results indicate that both cytochrome c peroxidase and the apoenzyme undergo extensive structural modifications upon exposure to alkaline pH, including dimer formation. The midpoint of the transition for dimer formation in the native enzyme occurs at pH 9.6 +/- 0.1, while loss of tertiary and secondary structure occurs with transition midpoints at pH 10.3 +/- 0.1 and pH 11.3 +/- 0.1, respectively. Studies performed in the presence of dithiothreitol and with carboxymethylated cytochrome c peroxidase indicate that dimer formation occurs via a disulfide crosslink involving the single cysteine residue in the enzyme. Denaturation of cytochrome c peroxidase in the presence of guanidine hydrochloride gave results similar to those obtained for the alkaline denaturation.
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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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