title: Purification, crystallization and preliminary crystallographic analysis of WsaF, an essential rhamnosyltransferase from Geobacillus stearothermophilus.
abstract: The beta1,2-rhamnosyltransferase WsaF is involved in the biosynthesis of a polyrhamnan chain which is attached to the surface-layer protein from Geobacillus stearothermophilus NRS 2004/3a. The enzyme belongs to the large retaining GT4 family. To date, no structure of a rhamnosyltransferase has been published. Recombinant purified native WsaF has been crystallized, resulting in crystals that belonged to space group P2(1)2(1)2(1) with unit-cell parameters a = 50.5, b = 56.1, c = 276.8 A and diffracted to 3.0 A resolution. Selenomethionine-variant WsaF crystallized in space group P2(1) with unit-cell parameters a = 75.9, b = 75.5, c = 78.1 A and diffracted to 2.3 A resolution.
authors.affiliation: Centre for Biomolecular Sciences, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, Scotland.
authors.forename: Kerstin
authors.initials: K
authors.lastname: Steiner
authors.forename: Anna
authors.initials: A
authors.lastname: Wojciechowska
authors.forename: Christina
authors.initials: C
authors.lastname: Schäffer
authors.forename: James H
authors.initials: JH
authors.lastname: Naismith
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D003460:Crystallization; D018360:Crystallography, X-Ray; D001411:Geobacillus stearothermophilus / Q000201:enzymology*; D006602:Hexosyltransferases / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification
chemical_list: D001426:Bacterial Proteins; D006602:Hexosyltransferases