The small ubiquitin-like modifier (SUMO) can be conjugated to lysine residues directly by the ubiquitin-conjugating protein Ubc9. SUMO conjugation can be catalyzed in vitro using only E1, Ubc9 (E2), mature SUMO, and ATP because Ubc9 directly recognizes consensus SUMO modification sites found in many identified targets of SUMO conjugation. This article describes methods to prepare Ubc9 and provides details for assay conditions used to evaluate E2 thioester formation and E2-mediated SUMO conjugation under single turnover and multiple turnover conditions. It also briefly describes parameters used to evaluate E3-mediated SUMO conjugation. Conservation of the SUMO conjugation apparatus from yeast to human has enabled in vivo assessment of human Ubc9 function through yeast complementation assays.
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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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