We have reconstituted an ATP-dependent protein folding machinery using purified yeast cytosolic proteins. The S. cerevisiae Hsp70 Ssa1p and the DnaJ homolog Ydj1p refolded denatured firefly luciferase. In E. coli, efficient refolding of luciferase requires the Hsp70 DnaK and two modulators, DnaJ and GrpE, that synergistically stimulate its ATPase activity. Exchanging DnaJ homologs between the S. cerevisiae and E. coli systems revealed that their ability to stimulate Hsp70 ATPase activity was conserved. In contrast, GrpE further stimulated only DnaK's ATPase activity. Efficient refolding of luciferase by Ssa1p and DnaJ, but not by DnaK and Ydj1p, suggests that a compatible Hsp70/DnaJ homolog pair can act as a protein folding machinery.
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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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