1hn9
From Proteopedia
CRYSTAL STRUCTURE OF BETA-KETOACYL-ACP SYNTHASE III
Overview
Beta-ketoacyl-acyl carrier protein synthase III (FabH), the most divergent member of the family of condensing enzymes, is a key catalyst in bacterial fatty acid biosynthesis and a promising target for novel antibiotics. We report here the crystal structures of FabH determined in the presence and absence of acetyl-CoA. These structures display a fold that is common for condensing enzymes. The observed acetylation of Cys(112) proves its catalytic role and clearly defines the primer binding pocket. Modeling based on a bound CoA molecule suggests catalytic roles for His(244) and Asn(274). The structures provide the molecular basis for FabH substrate specificity and reaction mechanism and are important for structure-based design of novel antibiotics.
About this Structure
1HN9 is a Single protein structure of sequence from Escherichia coli. This structure supersedes the now removed PDB entry 1d9b. Full crystallographic information is available from OCA.
Reference
Crystal structure of beta-ketoacyl-acyl carrier protein synthase III. A key condensing enzyme in bacterial fatty acid biosynthesis., Qiu X, Janson CA, Konstantinidis AK, Nwagwu S, Silverman C, Smith WW, Khandekar S, Lonsdale J, Abdel-Meguid SS, J Biol Chem. 1999 Dec 17;274(51):36465-71. PMID:10593943 Page seeded by OCA on Fri May 2 19:02:00 2008
