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UniProt functional annotation for P51668 | ||
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| UniProt code: P51668. |
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| Organism: | |
Homo sapiens (Human). |
| Taxonomy: | |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo. |
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| Function: | |
Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins (PubMed:22496338). In vitro catalyzes 'Lys-48'-linked polyubiquitination (PubMed:20061386). Mediates the selective degradation of short-lived and abnormal proteins. Functions in the E6/E6-AP-induced ubiquitination of p53/TP53. Mediates ubiquitination of PEX5 and auto-ubiquitination of STUB1, TRAF6 and TRIM63/MURF1 (PubMed:18042044, PubMed:18359941). Ubiquitinates STUB1-associated HSP90AB1 in vitro (PubMed:18042044). Lacks inherent specificity for any particular lysine residue of ubiquitin (PubMed:18042044). Essential for viral activation of IRF3 (PubMed:19854139). Mediates polyubiquitination of CYP3A4 (PubMed:19103148). {ECO:0000269|PubMed:18042044, ECO:0000269|PubMed:18359941, ECO:0000269|PubMed:19103148, ECO:0000269|PubMed:19854139, ECO:0000269|PubMed:20061386, ECO:0000269|PubMed:22496338}. |
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| Catalytic activity: | |
Reaction=S-ubiquitinyl-[E1 ubiquitin-activating enzyme]-L-cysteine + [E2 ubiquitin-conjugating enzyme]-L-cysteine = [E1 ubiquitin- activating enzyme]-L-cysteine + S-ubiquitinyl-[E2 ubiquitin- conjugating enzyme]-L-cysteine.; EC=2.3.2.23; Evidence={ECO:0000255|PROSITE-ProRule:PRU00388, ECO:0000255|PROSITE- ProRule:PRU10133, ECO:0000269|PubMed:18042044, ECO:0000269|PubMed:19854139, ECO:0000269|PubMed:20061386}; |
| Catalytic activity: | |
Reaction=S-ubiquitinyl-[E1 ubiquitin-activating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E1 ubiquitin-activating enzyme]-L- cysteine + N(6)-monoubiquitinyl-[acceptor protein]-L-lysine.; EC=2.3.2.24; Evidence={ECO:0000269|PubMed:17588522}; |
| Pathway: | |
Protein modification; protein ubiquitination. {ECO:0000255|PROSITE-ProRule:PRU00388}. |
| Subunit: | |
Component of a E3 ubiquitin ligase complex containing UBE2D1, SIAH1, CACYBP/SIP, SKP1, APC and TBL1X. Interacts with RNF11. {ECO:0000269|PubMed:11389839, ECO:0000269|PubMed:14562029, ECO:0000269|PubMed:21685362}. |
| Subcellular location: | |
Cytoplasm {ECO:0000269|PubMed:18845142}. |
| Tissue specificity: | |
Ubiquitous. Up-regulated in livers of iron- overloaded patients with hereditary hemochromatosis. {ECO:0000269|PubMed:12480712, ECO:0000269|PubMed:9362508}. |
| Ptm: | |
Autoubiquitinated in vitro. {ECO:0000269|PubMed:22496338}. |
| Similarity: | |
Belongs to the ubiquitin-conjugating enzyme family. {ECO:0000255|PROSITE-ProRule:PRU00388}. |
Annotations taken from UniProtKB at the EBI.