Cysteinyl peptide Inhibitors of Bacillus cereus Zinc β-Lactamase
摘要:
Several cysteinyl peptides have been synthesised and shown to be reversible competitive inhibitors of the Bacillus cereus metallo-beta -lactamase. The pH dependence of pK(i) indicates that the thiol anion displaces hydroxide ion from the active site zinc(II). D,D-Peptides bind to the enzyme better than other diastereoisomers, which is compatible with the predicted stereochemistry of the active site. (C) 2001 Elsevier Science Ltd. All rights reserved.
Improved efficiency and selectivity in peptide synthesis: Use of triethylsilane as a carbocation scavenger in deprotection of t-butyl esters and t-butoxycarbonyl-protected sites
作者:Anita Mehta、Rabih Jaouhari、Timothy J. Benson、Kenneth T. Douglas
DOI:10.1016/s0040-4039(00)79116-7
日期:1992.9
triethylsilane as a carbocation scavenger in the presence of trifluoroacetic acid in dichloromethane leads to increased yields, decreased reaction times, simple work-up and improved selectivity for the deprotection of t-butyl ester and t-butoxycarbonyl sites in protected amino-acids and peptides in the presence of otheracid-sensitiveprotectinggroups such as the benzyloxycarbonyl, 9-fluorenylmethoxycarbonyl