title: Preliminary X-ray crystallographic analysis of ornithine acetyltransferase (Rv1653) from Mycobacterium tuberculosis.
abstract: The gene product of open reading frame Rv1653 from Mycobacterium tuberculosis is annotated as encoding a probable ornithine acetyltransferase (OATase; EC 2.3.1.35), an enzyme that catalyzes two steps in the arginine-biosynthesis pathway. It transfers an acetyl group from N-acetylornithine to L-glutamate to produce N-acetylglutamate and L-ornithine. Rv1653 was crystallized using the sitting-drop vapour-diffusion method. The native crystals diffracted to a resolution of 1.7 A and belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 60.1, b = 99.7, c = 155.3 A. The preliminary X-ray study showed the presence of a dimer in the asymmetric unit of the crystals, which had a Matthews coefficient V(M) of 2.8 A(3) Da(-1).
authors.affiliation: Protein Structure and Function Group, Department of Biochemistry, University of Alberta, Edmonton, Alberta T6G 2H7, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Sankaranarayanan
authors.forename: C R
authors.initials: CR
authors.lastname: Garen
authors.forename: M M
authors.initials: MM
authors.lastname: Cherney
authors.forename: M
authors.initials: M
authors.lastname: Yuan
authors.forename: C
authors.initials: C
authors.lastname: Lee
authors.forename: M N G
authors.initials: MN
authors.lastname: James
mesh_terms: D000123:Acetyltransferases / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D017124:Conserved Sequence; D018360:Crystallography, X-Ray; D008969:Molecular Sequence Data; D009169:Mycobacterium tuberculosis / Q000201:enzymology* / Q000235:genetics; D016415:Sequence Alignment; D013912:Threonine / Q000737:chemistry
chemical_list: D001426:Bacterial Proteins; D013912:Threonine; D000123:Acetyltransferases; C020646:glutamate acetyltransferase