Cdc37 associates with the heat-shock protein 90 (Hsp90) molecular chaperone as one of several auxiliary proteins that are collectively referred to as Hsp90 co-chaperones. Cdc37 has been proposed to be a specificity factor for Hsp90, directing it notably towards kinases. It is not known whether Cdc37 is essential for viability in the budding yeast Saccharomyces cerevisiae because of Hsp90-dependent or -independent functions or both. Sti1 and Cpr7 are non-essential Hsp90 co-chaperones that bind to a common surface on Hsp90 through tetratricopeptide repeats (TPR). We have found that Sti1 is specifically retained from yeast extracts by immobilized Cdc37. Similarly, the endogenous proteins are also found in a complex. Moreover, purified recombinant Sti1 and Cdc37 interact in the complete absence of Hsp90. Complexes between Cdc37 and Sti1 are not unique to this TPR protein since endogenous Cdc37 can be co-purified with exogenously expressed Cpr7 fused to glutathione-S-transferase. The heterogeneity of Cdc37 complexes, both with and without Hsp90, may expand the functional diversity of Cdc37. Here we show that the combination of cdc37 and sti1 mutations is synthetically lethal, suggesting that direct contacts between Cdc37 and Sti1 may at least contribute to vital functions in yeast.
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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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