In this section, you can access to the latest technical information related to the FUTURE project topic.

Efficient Semi?Synthesis of Atypical Ubiquitin Chains and Ubiquitin?Based Probes Forged by Thioether Isopeptide Bonds

Ubiquitin probes: The cysteine?aminoethylation assisted chemical ubiquitination (CAACU) strategy is extended and improved to enable the efficient semi?synthesis of atypical Ub chain analogues and Ub?based probes (see scheme).The development of powerful and general methods to acquire ubiquitin (Ub) chains has prompted the deciphering of Ub?mediated processes. Herein, the cysteine?aminoethylation assisted chemical ubiquitination (CAACU) strategy is extended and improved to enable the efficient semi?synthesis of atypical Ub chain analogues and Ub?based probes. Combining the Cys aminoethylation and the auxiliary?mediated protein ligation, several linkage? and length?defined atypical Ub chains including di?Ubs, K27C?linked tri?Ub, K11/K48C?branched tri?Ub, and even the SUMOlated Ub are successfully prepared from recombinantly expressed starting materials at about a 9?20?mg?L?1 expression level. In addition, the utility of this strategy is demonstrated with the synthesis of a novel non?hydrolyzable di?Ub PA probe, which may provide a new useful tool for the mechanistic studies of deubiquitinase (DUB) recognition.

» Author: Guo?Chao Chu, Xiao Hua, Chong Zuo, Chen?Chen Chen, Xian?Bin Meng, Zhongping Zhang, Yao Fu, Jing Shi, Yi?Ming Li

» Reference: doi:10.1002/chem.201904010

» Publication Date: 06/12/2019

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