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| Content Provider | PubMed Central |
|---|---|
| Author | Wang, Min Cheng, Dongmei Peng, Junmin Pickart, Cecile M. |
| Copyright Year | 2006 |
| Abstract | Ubiquitin (Ub)-protein ligases (E3s) frequently modify their substrates with multiple Ub molecules in the form of a polyubiquitin (poly-Ub) chain. Although structurally distinct poly-Ub chains (linked through different Ub lysine (Lys) residues) can confer different fates on target proteins, little is known about how E3s select the Lys residue to be used in chain synthesis. Here, we used a combination of mutagenesis, biochemistry, and mass spectrometry to map determinants of linkage choice in chain assembly catalyzed by KIAA10, an HECT (Homologous to E6AP C-Terminus) domain E3 that synthesizes K29- and K48-linked chains. Focusing on the Ub molecule that contributes the Lys residue for chain formation, we found that specific surface residues adjacent to K48 and K29 are critical for the usage of the respective Lys residues in chain synthesis. This direct mechanism of linkage choice bears similarities to the mechanism of substrate site selection in sumoylation catalyzed by Ubc9, but is distinct from the mechanism of chain linkage selection used by the Mms2/Ubc13 (Ub E2 variant (UEV)/E2) complex. |
| Related Links | http://dx.doi.org/10.1038/sj.emboj.7601061 |
| Ending Page | 1719 |
| Page Count | 10 |
| Starting Page | 1710 |
| File Format | |
| ISSN | 02614189 |
| e-ISSN | 14602075 |
| Journal | The EMBO Journal |
| Issue Number | 8 |
| Volume Number | 25 |
| Language | English |
| Publisher Date | 2006-04-19 |
| Access Restriction | Open |
| Subject Keyword | Biochemistry, Genetics and Molecular Biology(all) Immunology and Microbiology(all) Neuroscience(all) Molecular Biology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Molecular Biology |
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