4AFN

Crystal structure of 3-ketoacyl-(acyl-carrier-protein) reductase (FabG) from Pseudomonas aeruginosa at 2.3A resolution

4AFN の概要

• エントリーDOI: 10.2210/pdb4afn/pdb
• 分子名称: 3-OXOACYL-[ACYL-CARRIER-PROTEIN] REDUCTASE FABG, PENTAETHYLENE GLYCOL (3 entities in total)
• 機能のキーワード: fatty acid biosynthesis, oxidoreductase, rossmann fold
• 由来する生物種: PSEUDOMONAS AERUGINOSA
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 113386.68

構造登録者

Cukier, C.D.,Schnell, R.,Schneider, G.,Lindqvist, Y. (登録日: 2012-01-20, 公開日: 2013-01-30, 最終更新日: 2023-12-20)

主引用文献

Cukier, C.D.,Hope, A.,Elamin, A.,Moynie, L.,Schnell, R.,Schach, S.,Kneuper, H.,Singh, M.,Naismith, J.,Lindqvist, Y.,Gray, D.,Schneider, G.
Discovery of an Allosteric Inhibitor Binding Site in 3-Oxo-Acyl-Acp Reductase from Pseudomonas Aeruginosa
Acs Chem.Biol., 8:2518-, 2013

PubMed Abstract: 3-Oxo-acyl-acyl carrier protein (ACP) reductase (FabG) plays a key role in the bacterial fatty acid synthesis II system in pathogenic microorganisms, which has been recognized as a potential drug target. FabG catalyzes reduction of a 3-oxo-acyl-ACP intermediate during the elongation cycle of fatty acid biosynthesis. Here, we report gene deletion experiments that support the essentiality of this gene in P. aeruginosa and the identification of a number of small molecule FabG inhibitors with IC50 values in the nanomolar to low micromolar range and good physicochemical properties. Structural characterization of 16 FabG-inhibitor complexes by X-ray crystallography revealed that the compounds bind at a novel allosteric site located at the FabG subunit-subunit interface. Inhibitor binding relies primarily on hydrophobic interactions, but specific hydrogen bonds are also observed. Importantly, the binding cavity is formed upon complex formation and therefore would not be recognized by virtual screening approaches. The structure analysis further reveals that the inhibitors act by inducing conformational changes that propagate to the active site, resulting in a displacement of the catalytic triad and the inability to bind NADPH.

PubMed: 24015914
DOI: 10.1021/CB4005063

実験手法

X-RAY DIFFRACTION (2.3 Å)