title: Crystallization and preliminary X-ray crystallographic analysis of UDP-N-acetylglucosamine acyltransferase from Helicobacter pylori.
abstract: Lipid A, a constituent of lipopolysaccharides, is essential for the growth and virulence of most Gram-negative bacteria. This makes its biosynthetic enzymes potential targets for development of new antibacterial agents. The first step of lipid A biosynthesis is catalyzed by the enzyme UDP-N-acetylglucosamine acyltransferase (LpxA). LpxA from the pathogenic bacterium Helicobacter pylori has been overexpressed in Escherichia coli and crystallized at 297 K using ammonium sulfate and sodium/potassium tartrate as precipitants in the presence of a detergent. Diffraction data to 2.1 A resolution have been collected from a native crystal. The crystal belongs to space group P6(3)22, with unit-cell parameters a = b = 90.69, c = 148.20 A. The asymmetric unit contains one subunit of LpxA, with a crystal volume per protein mass (V(M)) of 2.87 A(3) Da(-1) and a solvent content of 57.1%.
authors.affiliation: Structural Proteomics Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-742, South Korea.
authors.forename: Byung Il
authors.initials: BI
authors.lastname: Lee
authors.forename: Jae Young
authors.initials: JY
authors.lastname: Lee
authors.forename: Jinho
authors.initials: J
authors.lastname: Moon
authors.forename: Byung Woo
authors.initials: BW
authors.lastname: Han
authors.forename: Se Won
authors.initials: SW
authors.lastname: Suh
mesh_terms: D000217:Acyltransferases / Q000737:chemistry*; D018360:Crystallography, X-Ray; D016480:Helicobacter pylori / Q000201:enzymology*; D011487:Protein Conformation
chemical_list: D000217:Acyltransferases; C050304:acyl-(acyl-carrier-protein)-UDP-N-acetylglucosamine acyltransferase