The folding and stability of recombinant homomeric (alpha-only) pyruvate decarboxylase from yeast was investigated. Different oligomeric states (tetramers, dimers and monomers) of the enzyme occur under defined conditions. The enzymatic activity is used as a sensitive probe for structural differences between the active and inactive form (mis-assembled forms, aggregates) of the folded protein. Unfolding kinetics starting from the native protein comprise both the dissociation of the oligomers into monomers and their subsequent denaturation, which could be monitored by stopped-flow kinetics. In the course of unfolding, the tetramers do not directly dissociate into monomers, but via a stable dimeric state. Starting from the unfolded state, a reactivation of homomeric pyruvate decarboxylase requires both refolding to monomers and their correct association to enzymatically active dimers or tetramers. The reactivation yield under the in vitro conditions used follows an optimum behavior.
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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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| 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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