Folding enzymes often use distinct domains for the binding of substrate proteins ("chaperone domains") and for the catalysis of slow folding reactions such as disulfide formation or prolyl isomerization. The human prolyl isomerase FKBP12 is a small single-domain protein without a chaperone domain. Its very low folding activity could previously be increased by inserting the chaperone domain from the homolog SlyD (sensitive-to-lysis protein D) of Escherichia coli. We now inserted three unrelated chaperone domains into human FKBP12: the apical domain of the chaperonin GroEL from E. coli, the chaperone domain of protein disulfide isomerase from yeast, or the chaperone domain of SurA from the periplasm of E. coli. All three conveyed FKBP12 with a high affinity for unfolded proteins and increased its folding activity. Substrate binding and release of the chimeric folding enzymes were found to be very fast. This allows rapid substrate transfer from the chaperone domain to the catalytic domain and ensures efficient rebinding of protein chains that were unable to complete folding. The advantage of having separate sites, first for generic protein binding and then for specific catalysis, explains why our construction of the artificial folding enzymes with foreign chaperone domains was successful.
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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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