PMID- 22085339 OWN - NLM STAT- MEDLINE DCOM- 20120308 LR - 20211203 IS - 1520-4804 (Electronic) IS - 0022-2623 (Linking) VI - 54 IP - 24 DP - 2011 Dec 22 TI - Mechanistic analysis of muraymycin analogues: a guide to the design of MraY inhibitors. PG - 8421-39 LID - 10.1021/jm200906r [doi] AB - The systematic structure-activity relationship (SAR) of the muraymycins (MRYs) using an Ugi four-component reaction (U4CR) was investigated. The impact of the lipophilic substituent on antibacterial activity was significant, and the analogues 8 and 9 having a lipophilic side chain exhibited good activity against a range of Gram-positive bacterial pathogens, including MRSA and VRE. Further investigation of compounds 8 and 9 revealed these analogues to be selective inhibitors of the MraY transferase and nontoxic to HepG2 cells. The SAR of the accessory urea-peptide moiety indicated that it could be simplified. Our SAR study of the MRYs suggests a probable mechanism for inhibition of the MraY, where the inner moiety of the urea-dipeptide motif interacts with the carbohydrate recognition domain in the cytoplasmic loop 5. The predicted binding model would provide further direction toward the design of potent MraY inhibitors. This study has set the stage for the generation of novel antibacterial "lead" compounds based on MRYs. FAU - Tanino, Tetsuya AU - Tanino T AD - Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan. FAU - Al-Dabbagh, Bayan AU - Al-Dabbagh B FAU - Mengin-Lecreulx, Dominique AU - Mengin-Lecreulx D FAU - Bouhss, Ahmed AU - Bouhss A FAU - Oyama, Hiroshi AU - Oyama H FAU - Ichikawa, Satoshi AU - Ichikawa S FAU - Matsuda, Akira AU - Matsuda A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20111115 PL - United States TA - J Med Chem JT - Journal of medicinal chemistry JID - 9716531 RN - 0 (Anti-Bacterial Agents) RN - 0 (Bacterial Proteins) RN - 0 (Nucleosides) RN - 0 (Peptides) RN - 0 (muraymycin D2) RN - EC 2.- (Transferases) RN - EC 2.7.8.- (Transferases (Other Substituted Phosphate Groups)) RN - EC 2.7.8.13 (mraY protein, Bacteria) SB - IM MH - Anti-Bacterial Agents/*chemical synthesis/chemistry/pharmacology MH - Bacterial Proteins/*antagonists & inhibitors MH - Drug Resistance, Bacterial MH - Enterococcus faecalis/drug effects MH - Enterococcus faecium/drug effects MH - Hep G2 Cells MH - Humans MH - Microbial Sensitivity Tests MH - Models, Molecular MH - Molecular Conformation MH - Nucleosides/*chemical synthesis/chemistry/pharmacology MH - Peptides/*chemical synthesis/chemistry/pharmacology MH - Protein Binding MH - Staphylococcus aureus/drug effects MH - Stereoisomerism MH - Structure-Activity Relationship MH - Transferases/*antagonists & inhibitors MH - Transferases (Other Substituted Phosphate Groups) EDAT- 2011/11/17 06:00 MHDA- 2012/03/09 06:00 CRDT- 2011/11/17 06:00 PHST- 2011/11/17 06:00 [entrez] PHST- 2011/11/17 06:00 [pubmed] PHST- 2012/03/09 06:00 [medline] AID - 10.1021/jm200906r [doi] PST - ppublish SO - J Med Chem. 2011 Dec 22;54(24):8421-39. doi: 10.1021/jm200906r. Epub 2011 Nov 15.