The coding sequence for the yeast ubiquitin-conjugating enzyme Ubc7 was obtained by PCR from Saccharomyces cerevisiae genomic DNA. This sequence was placed in a plasmid containing the lambdaPL promoter and was used for temperature-regulated expression in Escherichia coli. The expressed 18-kDa protein was isolated in the inclusion body fraction from bacterial lysates, in contrast to the soluble nature of other yeast ubiquitin-conjugating enzymes expressed in E. coli. Selective solubilization of the protein using 5 M urea followed by dialysis, MonoQ FPLC, and Superdex-75 FPLC yielded electrophoretically pure Ubc7 protein. The purified protein was enzymatically active as determined by formation of enzyme-linked thiolester with ubiquitin. The ability of Ubc7 protein to regain enzymatic activity after urea denaturation appears to be attributable to the stable core alpha/beta folded structure common to the ubiquitin-conjugating enzymes whose structures have been determined to date.
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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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