title: Purification, crystallization and preliminary X-ray crystallographic study of alpha-amylase from Bacillus stearothermophilus.
abstract: A recombinant alpha-amylase from Bacillus stearothermophilus was found to be produced as several isoforms arising from different N--terminal processing. Some of those isoforms were purified to homogeneity and crystallized at 293 K using the hanging-drop vapour-diffusion method under the following conditions: 35 mM sodium acetate (pH 4.6), 6.25%(v/v) 2-propanol, in the presence of 1.23%(w/v) acarbose (a pseudo-oligosaccharide inhibitor) in the drop. The crystals diffracted beyond 2.0 A resolution using synchrotron radiation at the Photon Factory, Tsukuba. They belong to the monoclinic space group P2(1), with unit-cell parameters a = 53.7 (2), b = 92.9 (4), c = 53.2 (2) A, beta = 109.4 (1) degrees.
authors.affiliation: Institute of Applied Biochemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: D
authors.initials: D
authors.lastname: Suvd
authors.forename: K
authors.initials: K
authors.lastname: Takase
authors.forename: Z
authors.initials: Z
authors.lastname: Fujimoto
authors.forename: M
authors.initials: M
authors.lastname: Matsumura
authors.forename: H
authors.initials: H
authors.lastname: Mizuno
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry / Q000302:isolation & purification; D003460:Crystallization; D018360:Crystallography, X-Ray; D001411:Geobacillus stearothermophilus / Q000201:enzymology*; D008969:Molecular Sequence Data; D020033:Protein Isoforms / Q000737:chemistry / Q000302:isolation & purification; D011994:Recombinant Proteins / Q000737:chemistry / Q000302:isolation & purification; D000516:alpha-Amylases / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D001426:Bacterial Proteins; D020033:Protein Isoforms; D011994:Recombinant Proteins; D000516:alpha-Amylases