Structure-Based Design of a New Series of <scp>d</scp>-Glutamic Acid Based Inhibitors of Bacterial UDP-<i>N</i>-acetylmuramoyl-<scp>l</scp>-alanine:<scp>d</scp>-glutamate Ligase (MurD)
作者:Tihomir Tomašić、Nace Zidar、Roman Šink、Andreja Kovač、Didier Blanot、Carlos Contreras-Martel、Andréa Dessen、Manica Müller-Premru、Anamarija Zega、Stanislav Gobec、Danijel Kikelj、Lucija Peterlin Mašič
DOI:10.1021/jm2002525
日期:2011.7.14
MurD ligase is one of the key enzymes participating in the intracellular steps of peptidoglycan biosynthesis and constitutes a viable target in the search for novel antibacterial drugs to combat bacterial drug-resistance. We have designed, synthesized, and evaluated a new series of D-glutamic acid-based Escherichia colt MurD inhibitors incorporating the 5-benzylidenethiazolidin-4-one scaffold. The crystal structure of 16 in the MurD active site has provided a good starting point for the design of structurally optimized inhibitors 73-75 endowed with improved MurD inhibitory potency (IC50 between 3 and 7 mu M). Inhibitors 74 and 75 showed weak activity against Gram-positive Staphylococcus aureus and Enterococcus faecalis. Compounds 73-75, with IC50 values in the low micromolar range, represent the most potent D-Glu-based MurD inhibitors reported to date.