title: Crystallization and preliminary X-ray analysis of pyruvate kinase from Bacillus stearothermophilus.
abstract: Pyruvate kinase (PK) from a moderate thermophile, Bacillus stearothermophilus (BstPK), is an allosteric enzyme activated by AMP and ribose 5-phosphate but not by fructose 1,6-bisphosphate (FBP). However, almost all other PKs are activated by FBP. The wild-type and W416F/V435W mutant BstPKs were crystallized by the hanging-drop vapour-diffusion method. However, they were unsuitable for structural analysis because their data sets exhibited low completeness. A crystal suitable for structural analysis was obtained using C9S/C268S enzyme. The crystal belonged to space group P6(2)22, with unit-cell parameters a = b = 145.97, c = 118.03 A.
authors.affiliation: Department of Food and Nutritional Sciences, University of Shizuoka, Yada 52-1, Shizuoka 422-8526, Japan.
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Suzuki
authors.forename: Sohei
authors.initials: S
authors.lastname: Ito
authors.forename: Akiko
authors.initials: A
authors.lastname: Shimizu-Ibuka
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sakai
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D001411:Geobacillus stearothermophilus / Q000201:enzymology*; D011770:Pyruvate Kinase / Q000737:chemistry*; D011994:Recombinant Proteins / Q000737:chemistry
chemical_list: D011994:Recombinant Proteins; D011770:Pyruvate Kinase