Microcin C and Albomycin Analogues with Aryl-tetrazole Substituents as Nucleobase Isosters Are Selective Inhibitors of Bacterial Aminoacyl tRNA Synthetases but Lack Efficient Uptake
作者:Gaston H. Vondenhoff、Bharat Gadakh、Konstantin Severinov、Arthur Van Aerschot
DOI:10.1002/cbic.201200174
日期:2012.9.3
Synthetases' Achilles' heel? Selective inhibition of bacterialaminoacyltRNAsynthetases was previously accomplished by using aminoacyl sulfamoyladenosines and substituting aryltetrazole moieties for the adenine heterocycle. While these compounds did not prove successful in vivo, conjugation to peptidic Trojan horses or siderophore drug conjugate (SDC) transport modules envisaged improved uptake.
Extended targeting potential and improved synthesis of Microcin C analogs as antibacterials
作者:Gaston H.M. Vondenhoff、Svetlana Dubiley、Konstantin Severinov、Eveline Lescrinier、Jef Rozenski、Arthur Van Aerschot
DOI:10.1016/j.bmc.2011.07.052
日期:2011.9
Microcin C (McC) (1) is a potent antibacterial compound produced by some Escherichia coli strains. McC functions through a Trojan-Horse mechanism: it is actively taken up inside a sensitive cell through the function of the YejABEF-transporter and then processed by cellular aminopeptidases. Processed McC (2) is a non-hydrolysable aspartyl-adenylate analog that inhibits aspartyl-tRNA synthetase (AspRS). A new synthesis is described that allows for the production of a wide variety of McC analogs in acceptable amounts. Using this synthesis a number of diverse compounds was synthesized with altered target specificity. Further characteristics of the YejABEF transporters were determined using these compounds. (C) 2011 Elsevier Ltd. All rights reserved.