Cdc34, a ubiquitin-conjugating enzyme in Saccharomyces cerevisiae, is required for cell cycle progression. sic1, an S-phase cyclin-dependent kinase (CDK) inhibitor, is a critical target of Cdc34-mediated ubiquitination. Other essential target protein(s) could be defined since cdc34 sic1 double mutants still arrest in G2 phase. To identify proteins which function in the Cdc34-dependent ubiquitin pathway, a series of extragenic suppressors of the cdc34-1 sic1 double mutations was isolated. One of them was found to be defective in GRR1, which is involved not only in glucose repression but also in G1 cyclin destabilization. However, neither lack of glucose repression nor stabilization of G1 cyclin caused the suppression of cdc34-1 sic1. Conversely, Grr1 overproduction in cdc34-1 sic1 cells impaired colony formation, even at the permissive temperature. A multicopy suppressor, MGO1, which rescued the growth defect associated with Grr1 overproduction was isolated, and found to be identical to SKP1. Furthermore, Grr1 bound Skp1 directly in vitro. These results strongly suggest that Grr1 functions in the ubiquitin pathway through association with Skp1.
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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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