Peptide Ligation Using a Building Block Having a Cysteinyl Prolyl Ester (CPE) Autoactivating Unit at the Carboxy Terminus
作者:Toru Kawakami、Saburo Aimoto
DOI:10.1246/cl.2007.76
日期:2007.1
CPE peptide ligation using a building block containing a cysteinyl prolyl ester (CPE) autoactivating unit is described. The peptide building block can be prepared by a standard Fmoc chemistry and used in thiol-mediated ligation, such as native chemical ligation.
The use of a cysteinyl prolyl ester (CPE) autoactivating unit in peptide ligation reactions
作者:Toru Kawakami、Saburo Aimoto
DOI:10.1016/j.tet.2009.03.008
日期:2009.5
A peptide containing a cysteinyl prolyl ester (CPE) moiety at the C-terminus (CPE peptide) is spontaneously transformed into a diketopiperazine thioester via an intramolecular N-S acyl shift reaction, Followed by diketopiperazine Formation. The CPE peptide can be ligated with a Cys-peptide in a one-pot procedure. The peptide diketopiperazine thioester call also be transformed into a peptide thioester by intermolecular thiol-thioester exchange with external thiol compounds such as sodium mercaptoethanesulfonate. Since CPE peptides call be prepared by standard Fmoc solid-phase synthesis, it is a versatile alternative to the peptide thioester, providing a flexible ligation strategy that promises to be useful in polypeptide synthesis. (C) 2009 Elsevier Ltd. All rights reserved.