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Practical Chemical Synthesis of Atypical Ubiquitin Chains by Using an Isopeptide‐Linked Ub Isomer
Author(s) -
Tang Shan,
Liang LuJun,
Si YanYan,
Gao Shuai,
Wang JiaXing,
Liang Jun,
Mei Ziqing,
Zheng JiShen,
Liu Lei
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201708067
Subject(s) - ubiquitin , native chemical ligation , hydrazide , ubiquitin ligase , chemistry , combinatorial chemistry , hexa , computational biology , stereochemistry , terminal (telecommunication) , biochemistry , chemical synthesis , computer science , biology , organic chemistry , gene , in vitro , telecommunications
Chemical ubiquitination is an effective approach for accessing structurally defined, atypical ubiquitin (Ub) chains that are difficult to prepare by other techniques. Herein, we describe a strategy that uses a readily accessible premade isopeptide‐linked 76‐mer (isoUb), which has an N‐terminal Cys and a C‐terminal hydrazide, as the key building block to assemble atypical Ub chains in a modular fashion. This method avoids the use of auxiliary‐modified Lys and instead employs the canonical and therefore more robust Cys‐based native chemical ligation technique. The efficiency and capacity of this isoUb‐based strategy is exemplified by the cost‐effective synthesis of several linkage‐ and length‐defined atypical Ub chains, including K27‐linked tetra‐Ub and K11/K48‐branched tri‐, tetra‐, penta‐, and hexa‐Ubs.