title: Purification, crystallization and preliminary X-ray analysis of a thermostable glycoside hydrolase family 43 beta-xylosidase from Geobacillus thermoleovorans IT-08.
abstract: The main enzymes involved in xylan-backbone hydrolysis are endo-1,4-beta-xylanase and beta-xylosidase. beta-Xylosidase converts the xylo-oligosaccharides produced by endo-1,4-beta-xylanase into xylose monomers. The beta-xylosidase from the thermophilic Geobacillus thermoleovorans IT-08, a member of glycoside hydrolase family 43, was crystallized at room temperature using the hanging-drop vapour-diffusion method. Two crystal forms were observed. Bipyramid-shaped crystals belonging to space group P4(3)2(1)2, with unit-cell parameters a = b = 62.53, c = 277.4 A diffracted to 1.55 A resolution. The rectangular crystals belonged to space group P2(1), with unit-cell parameters a = 57.94, b = 142.1, c = 153.9 A, beta = 90.5 degrees , and diffracted to 1.80 A resolution.
authors.affiliation: Department of Chemistry, Faculty of Mathematics and Natural Sciences, Airlangga University, Kampus C Unair, Jl. Mulyorejo, Surabaya 60115, Indonesia.
authors.forename: Ali
authors.initials: A
authors.lastname: Rohman
authors.forename: Niels
authors.initials: N
authors.lastname: van Oosterwijk
authors.forename: Slavko
authors.initials: S
authors.lastname: Kralj
authors.forename: Lubbert
authors.initials: L
authors.lastname: Dijkhuizen
authors.forename: Bauke W
authors.initials: BW
authors.lastname: Dijkstra
authors.forename: Ni Nyoman Tri
authors.initials: NN
authors.lastname: Puspaningsih
mesh_terms: D001406:Bacillaceae / Q000201:enzymology; D003460:Crystallization; D018360:Crystallography, X-Ray; D043364:Endo-1,4-beta Xylanases / Q000737:chemistry* / Q000302:isolation & purification; D004795:Enzyme Stability
chemical_list: D043364:Endo-1,4-beta Xylanases