title: Crystallization and preliminary X-ray data investigation of the bacterial enterocin A immunity protein at 1.65 A resolution.
abstract: Crystals of the bacterial enterocin A immunity protein have been prepared by the hanging-drop vapour-diffusion technique at 293 K. The crystals diffract to better than 1.7 A resolution and X-ray diffraction data to 1.65 A have been collected at 110 K using synchrotron radiation. The enterocin A immunity protein crystals belong to the monoclinic crystal system, with unit-cell parameters a = 116.32, b = 42.35, c = 66.17 A, beta = 111.3 degrees. The symmetry and systematic absences in the diffraction pattern are consistent with space group C2. The presence of two molecules in the asymmetric unit with a molecular weight of approximately 12.2 kDa gives a crystal volume per protein mass (V(M)) of approximately 3.1 A(3) Da(-1) and a solvent content of approximately 60% by volume.
authors.affiliation: Department of Chemistry, University of Oslo, PO Box 1033, Blindern, N-0315 Oslo, Norway. bjornda@kjemi.uio.no
authors.forename: Bjørn
authors.initials: B
authors.lastname: Dalhus
authors.forename: Line
authors.initials: L
authors.lastname: Johnsen
authors.forename: Jon
authors.initials: J
authors.lastname: Nissen-Meyer
mesh_terms: D001430:Bacteriocins / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D002942:Circular Dichroism; D003001:Cloning, Molecular; D003460:Crystallization; D017433:Protein Structure, Secondary; D014961:X-Ray Diffraction
chemical_list: D001430:Bacteriocins; C107799:enterocin A