title: Expression, crystallization and preliminary X-ray crystallographic studies of Arthrobacter globiformis inulin fructotransferase.
abstract: A recombinant form of Arthrobacter globiformis inulin fructotransferase (DFAIII-producing) has been overexpressed in Escherichia coli and purified to homogeneity. Crystals were obtained at 293 K by the hanging-drop vapour-diffusion technique using 0.1 M Na HEPES pH 7.5 buffer containing 1.5 M lithium sulfate as a precipitant. Crystals of the recombinant wild-type enzyme diffracted to better than 1.5 A at 100 K using a synchrotron-radiation source at the Photon Factory. The crystal belonged to space group R32, with unit-cell parameters a = b = 92.02, c = 229.82 A in the hexagonal axes. Assuming the presence of one molecule in the asymmetric unit, the V(M) value for the crystal was 2.15 A(3) Da(-1), indicating a solvent content of 42.8%. Selenomethionine-derivative crystals belonged to a different space group, C2, with unit-cell parameters a = 159.32, b = 91.92, c = 92.58 A, beta = 125.06. Matthews coefficient calculations suggested that the C2 selenomethionine-derivative crystal contained three molecules per asymmetric unit.
authors.affiliation: Department of Biotechnology, National Institute of Agrobiological Sciences, Tsukuba 305-8602, Japan.
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Momma
authors.forename: Zui
authors.initials: Z
authors.lastname: Fujimoto
authors.forename: Nobuo
authors.initials: N
authors.lastname: Maita
authors.forename: Kazutomo
authors.initials: K
authors.lastname: Haraguchi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Mizuno
mesh_terms: D001173:Arthrobacter / Q000201:enzymology* / Q000235:genetics; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics; D003460:Crystallization / Q000379:methods; D018360:Crystallography, X-Ray / Q000379:methods; D004926:Escherichia coli / Q000378:metabolism; D015870:Gene Expression; D006602:Hexosyltransferases / Q000096:biosynthesis / Q000737:chemistry* / Q000235:genetics; D020836:Protein Structure, Quaternary; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics; D012645:Selenomethionine / Q000737:chemistry; D017356:Synchrotrons
chemical_list: D001426:Bacterial Proteins; D011994:Recombinant Proteins; D012645:Selenomethionine; D006602:Hexosyltransferases; C021450:inulin fructotransferase (depolymerizing)