3oif

Publication Abstract from PubMed

Enoyl-[acyl carrier protein] (ACP) reductase (ENR) is a key enzyme in type II fatty acid synthesis that catalyzes the last step in each elongation cycle. Therefore, it has been considered as a target for antibiotics. However, recent studies indicate that some pathogens have more than one ENR; in particular, Bacillus subtilis has two ENRs, FabI and FabL. The crystal structures of the ternary complexes of BsFaBI and BsFabL are found as a homotetramer showing the same overall structure despite a sequence identity of only 24%. The positions of the catalytic dyad of Tyr-(Xaa)(6)-Lys in FabL are almost identical to that of FabI, but a detailed structural analysis shows that FabL shares more structural similarities with FabG and other members of the SDR (short-chain alcohol dehydrogenase/reductase) family. The apo FabL structure shows significantly different conformations at the cofactor and the substrate-binding regions, and this resulted in a totally different tetrameric arrangement reflecting the flexibility of these regions in the absence of the cofactor and substrate/inhibitor.

Crystal Structures of Enoyl-ACP Reductases I (FabI) and III (FabL) from B. subtilis.,Kim KH, Ha BH, Kim SJ, Hong SK, Hwang KY, Kim EE J Mol Biol. 2011 Feb 25;406(3):403-15. Epub 2010 Dec 23. PMID:21185310^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.