PMID- 16562839 OWN - NLM STAT- MEDLINE DCOM- 20060508 LR - 20131121 IS - 0163-3864 (Print) IS - 0163-3864 (Linking) VI - 69 IP - 3 DP - 2006 Mar TI - Discovery of bacterial fatty acid synthase inhibitors from a Phoma species as antimicrobial agents using a new antisense-based strategy. PG - 377-80 AB - Fatty acids are essential for bacterial growth and viability, with the type II fatty acid synthesis (FAS II) pathway being a potential antibacterial target. A new, selective, and highly sensitive whole cell-based antisense strategy has been designed to screen for natural product inhibitors of FabH/F of the FAS II pathway using a high-throughput two-plate agar-based differential sensitivity assay (FabF(2)p). An antisense assay along with the FASII enzyme prepared from Staphylococcus aureus was used for bioactivity-guided fractionation, leading to the isolation of phomallenic acids A-C (1-3) from a leaf litter fungus identified as Phoma sp. Compounds 1-3 exhibited minimum detection concentrations (MDC) of 0.63, 0.31, and 0.15 microg/mL in the FabF(2P) assay, IC(50) values of 22, 3.4, and 0.77 microg/mL in the FASII enzyme assay, and minimum inhibitory concentrations (MIC) of 250, 7.8, and 3.9 microg/mL, respectively, against wild-type S. aureus. Phomallenic acid C (3), the analogue with the longest chain, exhibited the best overall activity within the phomallenic acids obtained and was superior to cerulenin and thiolactomycin, the two most studied and commonly used FabF inhibitors. FAU - Ondeyka, John G AU - Ondeyka JG AD - Natural Products Chemistry and Medicinal Chemistry and Human and Animal Infectious Diseases, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, USA. FAU - Zink, Deborah L AU - Zink DL FAU - Young, Katherine AU - Young K FAU - Painter, Ronald AU - Painter R FAU - Kodali, Srinivas AU - Kodali S FAU - Galgoci, Andrew AU - Galgoci A FAU - Collado, Javier AU - Collado J FAU - Tormo, Jose Ruben AU - Tormo JR FAU - Basilio, Angela AU - Basilio A FAU - Vicente, Francisca AU - Vicente F FAU - Wang, Jun AU - Wang J FAU - Singh, Sheo B AU - Singh SB LA - eng PT - Journal Article PL - United States TA - J Nat Prod JT - Journal of natural products JID - 7906882 RN - 0 (Alkadienes) RN - 0 (Anti-Bacterial Agents) RN - 0 (Fatty Acids) RN - 0 (Multienzyme Complexes) RN - 0 (Thiophenes) RN - 0 (phomallenic acid A) RN - 0 (phomallenic acid B) RN - 0 (phomallenic acid C) RN - 82079-32-1 (thiolactomycin) RN - EC 2.3.1.- (Acetyltransferases) RN - EC 2.3.1.85 (Fatty Acid Synthases) RN - EC 6.- (Fatty Acid Synthase, Type II) SB - IM MH - Acetyltransferases/*antagonists & inhibitors MH - *Alkadienes/chemistry/isolation & purification/pharmacology MH - *Anti-Bacterial Agents/chemistry/isolation & purification/pharmacology MH - Ascomycota/*chemistry MH - Fatty Acid Synthase, Type II MH - Fatty Acid Synthases/*antagonists & inhibitors MH - Fatty Acids/biosynthesis MH - France MH - Methicillin Resistance MH - Microbial Sensitivity Tests MH - Molecular Structure MH - Multienzyme Complexes/*antagonists & inhibitors MH - Staphylococcus aureus/*drug effects MH - Thiophenes/pharmacology EDAT- 2006/03/28 09:00 MHDA- 2006/05/09 09:00 CRDT- 2006/03/28 09:00 PHST- 2006/03/28 09:00 [pubmed] PHST- 2006/05/09 09:00 [medline] PHST- 2006/03/28 09:00 [entrez] AID - 10.1021/np050416w [doi] PST - ppublish SO - J Nat Prod. 2006 Mar;69(3):377-80. doi: 10.1021/np050416w.