title: Crystallization and preliminary X-ray diffraction study of a chimaeric Fab' fragment of antibody binding tumour cells.
abstract: Crystals have been obtained of a chimaeric Fab' fragment that binds to a tumour-associated mucin-like glycoprotein TAG72. The Fab' fragment comprises the variable heavy and light-chain domains of a murine monoclonal antibody, B72.3, coupled to human gamma 4 and kappa constant regions. The crystals are orthorhombic and belong to the space group P2(1)2(1)2(1), with unit cell dimensions a = 67.9 A, b = 94.2 A and c = 208.8 A. Diffraction to 2.6 A resolution was observed using synchrotron radiation. Despite the acute radiation sensitivity of the crystals a full native data set has been collected using the Weissenberg camera at the Photon Factory synchrotron. These data will be used for molecular replacement calculations in an attempt to elucidate the structure of this chimaeric Fab' fragment.
authors.affiliation: Department of Chemistry, University of York, Heslington, U.K.
authors.forename: R L
authors.initials: RL
authors.lastname: Brady
authors.forename: R E
authors.initials: RE
authors.lastname: Hubbard
authors.forename: D J
authors.initials: DJ
authors.lastname: King
authors.forename: D C
authors.initials: DC
authors.lastname: Low
authors.forename: S M
authors.initials: SM
authors.lastname: Roberts
authors.forename: R J
authors.initials: RJ
authors.lastname: Todd
mesh_terms: D000818:Animals; D000951:Antigens, Neoplasm / Q000276:immunology*; D002852:Chromatography, Ion Exchange; D003460:Crystallization; D006023:Glycoproteins / Q000276:immunology*; D006801:Humans; D007140:Immunoglobulin Fab Fragments / Q000737:chemistry* / Q000276:immunology / Q000302:isolation & purification; D051379:Mice; D015394:Molecular Structure; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000276:immunology; D014961:X-Ray Diffraction
chemical_list: D000951:Antigens, Neoplasm; D006023:Glycoproteins; D007140:Immunoglobulin Fab Fragments; D011993:Recombinant Fusion Proteins; C047052:tumor-associated antigen 72