Native N-glycopeptide thioester synthesis through N→S acyl transfer
作者:Bhavesh Premdjee、Anna L. Adams、Derek Macmillan
DOI:10.1016/j.bmcl.2011.05.059
日期:2011.9
Peptidethioesters are important tools for the total synthesis of proteins using native chemical ligation (NCL). Preparation of glycopeptide thioesters, that enable the assembly of homogeneously glycosylated proteins, is complicated by the perceived fragile nature of the sugar moiety. Herein, we demonstrate the compatibility of thioesterformationviaN→S acyltransfer with native N-glycopeptides and
Cysteine Promoted C-Terminal Hydrazinolysis of Native Peptides and Proteins
作者:Anna L. Adams、Ben Cowper、Rachel E. Morgan、Bhavesh Premdjee、Stephen Caddick、Derek Macmillan
DOI:10.1002/anie.201304997
日期:2013.12.2
Tagging the terminus: N→S acyl transfer in nativepeptides and proteins can be reliably intercepted with hydrazine. The method allows selective labeling and ligation, without recourse to the use of protein‐splicing elements. NCL=native chemical ligation.
Exploring neoglycoprotein assembly through native chemical ligation using neoglycopeptide thioesters prepared via N→S acyl transfer
作者:Jonathan P. Richardson、Chung-Hei Chan、Javier Blanc、Mona Saadi、Derek Macmillan
DOI:10.1039/b920535g
日期:——
Sugars and simplified oligosaccharide “mimics” can be joined with protein fragments at pre-defined sites using reliable chemical reactions such as thiol alkylation and Cu(I) catalysed azide/acetylene ligation (click chemistry). These fragments have the potential to be assembled into neoglycoprotein therapeutics using native chemical ligation.
Investigation of peptide thioester formation via <i>N</i>
→<i>Se</i>
acyl transfer
作者:Anna L. Adams、Derek Macmillan
DOI:10.1002/psc.2469
日期:2013.2
occasionally observed significant thioester hydrolysis as a consequence of long reaction times (~48 h) and sought to accelerate the reaction. Here, we present a faster route to peptidethioesters, by replacing the C‐terminal cysteine residue with selenocysteine and initiating thioesterformationvia an N→Seacyl shift. This modification allows thioesterformation to take place at lower temperatures