E2 conjugating enzymes must disengage from their E1 enzymes before E3-dependent ubiquitin and ubiquitin-like transfer - PubMed (original) (raw)
doi: 10.1038/nsmb984. Epub 2005 Sep 4.
Affiliations
- PMID: 16142244
- DOI: 10.1038/nsmb984
E2 conjugating enzymes must disengage from their E1 enzymes before E3-dependent ubiquitin and ubiquitin-like transfer
Ziad M Eletr et al. Nat Struct Mol Biol. 2005 Oct.
Abstract
During ubiquitin ligation, an E2 conjugating enzyme receives ubiquitin from an E1 enzyme and then interacts with an E3 ligase to modify substrates. Competitive binding experiments with three human E2-E3 protein pairs show that the binding of E1s and of E3s to E2s are mutually exclusive. These results imply that polyubiquitination requires recycling of E2 for addition of successive ubiquitins to substrate.
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