Novel inhibitors of surface layer processing in Clostridium difficile
摘要:
Clostridium difficile, a leading cause of hospital-acquired bacterial infection, is coated in a dense surface layer (S-layer) that is thought to provide both physicochemical protection and a scaffold for host-pathogen interactions. The key structural components of the S-layer are two proteins derived from a polypeptide precursor, SlpA, via proteolytic cleavage by the protease Cwp84. Here, we report the design, synthesis and in vivo characterization of a panel of protease inhibitors and activity-based probes (ABPs) designed to target Slayer processing in live C. difficile cells. Inhibitors based on substrate-mimetic peptides bearing a C-terminal Michael acceptor warhead were found to be promising candidates for further development. (C) 2011 Elsevier Ltd. All rights reserved.
Glycocluster Synthesis by Native Chemical Ligation
作者:Thisbe Lindhorst、Johannes Wehner
DOI:10.1055/s-0030-1258157
日期:2010.9
Serine- and mannoside-derived thioesters and a mannosidic cysteine derivative were prepared to test native chemical ligation (NCL) for protecting-group-free synthesis of small glycopeptide clusters, which are valuable tools in the glycosciences. The glycopeptides and glycopeptide clusters, respectively, which were obtained via NCL, bear the potential for dimerization and other derivatization of the thiol functionality.