Genetically Encoded Cyclopropene Directs Rapid, Photoclick-Chemistry-Mediated Protein Labeling in Mammalian Cells
作者:Zhipeng Yu、Yanchao Pan、Zhiyong Wang、Jiangyun Wang、Qing Lin
DOI:10.1002/anie.201205352
日期:2012.10.15
We just click: Genetic incorporation of a cyclopropene amino acid CpK (see scheme) site‐specifically into proteins in E. coli and mammaliancells was achieved using an orthogonal aminoacyl‐tRNA synthetase/tRNACUA pair (CpKRS/MbtRNACUA). Cyclopropene exhibited fast reaction kinetics in the photoclick reaction and allowed rapid (ca. 2 min) labeling of proteins.
alkene (styrene) was investigated as the dipolarophile. Over 30-fold improvement in quantum yield of the reactionproduct was achieved in aqueous solution. According to our mechanistic studies, the observed improvement is likely due to an insufficient protonation of the styrene–tetrazole reactionproduct. This finding provides useful guidance to the future design of alkene–tetrazole reactions for biological
Triple Orthogonal Labeling of Glycans by Applying Photoclick Chemistry
作者:Verena F. Schart、Jessica Hassenrück、Anne-Katrin Späte、Jeremias E. G. A. Dold、Raphael Fahrner、Valentin Wittmann
DOI:10.1002/cbic.201800740
日期:2019.1.18
All good things come in threes: The nitrile imine–alkene cycloaddition (photoclick reaction) was shown to be a suitable ligation reaction for metabolic glycoengineering. In combination with an inverse‐electron‐demand Diels–Alder reaction and strain‐promoted azide–alkyne cycloaddition, triplelabeling of glycans was achieved for the first time.