Genetic Encoding and Labeling of Aliphatic Azides and Alkynes in Recombinant Proteins <i>via</i> a Pyrrolysyl-tRNA Synthetase/tRNA<sub>CUA</sub> Pair and Click Chemistry
作者:Duy P. Nguyen、Hrvoje Lusic、Heinz Neumann、Prashant B. Kapadnis、Alexander Deiters、Jason W. Chin
DOI:10.1021/ja900553w
日期:2009.7.1
recombinant proteins in Escherichia coli. Proteins containing the alkyne functional group are labeled with an azido biotin and an azido fluorophore, via copper catalyzed [3+2] cycloaddition reactions, to produce the corresponding triazoles in good yield. The methods reported are useful for the site-specific labeling of recombinant proteins and may be combined with mutually orthogonal methods of introducing
我们证明了正交 Methanosarcina barkeri MS pyrrolysyl-tRNA 合成酶/tRNA(CUA) 对指导 N6-[(2-丙炔氧基)羰基]-L-赖氨酸的高效、位点特异性掺入,含有碳-碳三键,和 N6-[(2-叠氮乙氧基)羰基]-L-赖氨酸,含有一个叠氮基,在大肠杆菌中转化为重组蛋白。含有炔官能团的蛋白质用叠氮基生物素和叠氮基荧光团标记,通过铜催化的 [3+2] 环加成反应,以良好的产率产生相应的三唑。报道的方法可用于重组蛋白质的位点特异性标记,并且可以与将非天然氨基酸引入蛋白质的相互正交方法以及蛋白质标记的化学正交方法相结合。