title: Crystallization of the NADP-dependent beta-keto acyl-carrier protein reductase from Brassica napus.
abstract: The NADP-dependent beta-keto acyl-carrier protein reductase (BKR) from Brassica napus has been crystallized by the hanging-drop vapour-diffusion method using polyethylene glycol of average molecular weight 1500 as the precipitant. The crystals belong to the hexagonal space group P6(4)22, with unit-cell parameters a = b = 129. 9, c = 93.1 A, alpha = beta = 90, gamma = 120 degrees. Calculated values for V(m), the use of rotation and translation functions and consideration of the packing suggest that the asymmetric unit contains a monomer. The crystals diffract to beyond 2.8 A resolution and are more amenable to X-ray diffraction analysis than those reported previously for the Escherichia coli enzyme. The structure determination of B. napus BKR will provide important insights into the catalytic mechanism of the enzyme and into the evolution of the fatty-acid elongation cycle by comparisons with the other oxidoreductase of the pathway, enoyl acyl-carrier protein reductase (ENR).
authors.affiliation: Krebs Institute for Biomolecular Research, Department of Molecular Biology and Biotechnology, The University of Sheffield, Sheffield S10 2TN, England.
authors.forename: M
authors.initials: M
authors.lastname: Fisher
authors.forename: S E
authors.initials: SE
authors.lastname: Sedelnikova
authors.forename: W
authors.initials: W
authors.lastname: Martindale
authors.forename: N C
authors.initials: NC
authors.lastname: Thomas
authors.forename: J W
authors.initials: JW
authors.lastname: Simon
authors.forename: A R
authors.initials: AR
authors.lastname: Slabas
authors.forename: J B
authors.initials: JB
authors.lastname: Rafferty
mesh_terms: D064431:3-Oxoacyl-(Acyl-Carrier-Protein) Reductase; D000429:Alcohol Oxidoreductases / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification*; D001937:Brassica / Q000201:enzymology* / Q000235:genetics; D003460:Crystallization; D018360:Crystallography, X-Ray; D004926:Escherichia coli / Q000235:genetics; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification
chemical_list: D011994:Recombinant Proteins; D000429:Alcohol Oxidoreductases; D064431:3-Oxoacyl-(Acyl-Carrier-Protein) Reductase