A strategy for modulation of enzymes in the ubiquitin system.

A strategy for modulation of enzymes in the ubiquitin system.
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DOI:
10.1126/science.1230161
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发表时间:
2013-02-01
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Sidhu SS
Sidhu SS
中科院分区:
其他
文献类型:
--
作者:
Ernst A;Avvakumov G;Tong J;Fan Y;Zhao Y;Alberts P;Persaud A;Walker JR;Neculai AM;Neculai D;Vorobyov A;Garg P;Beatty L;Chan PK;Juang YC;Landry MC;Yeh C;Zeqiraj E;Karamboulas K;Allali-Hassani A;Vedadi M;Tyers M;Moffat J;Sicheri F;Pelletier L;Durocher D;Raught B;Rotin D;Yang J;Moran MF;Dhe-Paganon S;Sidhu SS

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The ubiquitin system regulates virtually all aspects of cellular function. We report a method to target the myriad enzymes that govern ubiquitination of protein substrates. We used massively diverse combinatorial libraries of ubiquitin variants to develop inhibitors of four deubiquitinases (DUBs) and analyzed the DUB-inhibitor complexes with crystallography. We extended the selection strategy to the ubiquitin conjugating (E2) and ubiquitin ligase (E3) enzymes and found that ubiquitin variants can also enhance enzyme activity. Last, we showed that ubiquitin variants can bind selectively to ubiquitin-binding domains. Ubiquitin variants exhibit selective function in cells and thus enable orthogonal modulation of specific enzymatic steps in the ubiquitin system.
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