作者:Sameer S. Kulkarni、Emma E. Watson、Joshua W. C. Maxwell、Gerhard Niederacher、Jason Johansen‐Leete、Susanne Huhmann、Somnath Mukherjee、Alexander R. Norman、Julia Kriegesmann、Christian F. W. Becker、Richard J. Payne
DOI:10.1002/anie.202200163
日期:2022.5.9
An expressed protein selenoester ligation (EPSL) methodology that enables the efficient semi-synthesis of site-specifically modified proteins at high dilution is described. EPSL involves the one-pot conversion of protein acyl hydrazides (derived from recombinant intein fusion precursors) to protein aryl selenoesters, followed by ligation with synthetic modified selenopeptides and chemoselective deselenization
An improved method for the synthesis of S-alkylated cysteine derivatives with branched alkyl chains is reported. These compounds can be obtained in good yield and high purity by refluxing the cysteine thiol with the appropriate alkyl bromide in a solution of sodium ethoxide in ethanol. (C) 2001 Elsevier Science Ltd. All rights reserved.