title: Crystallization and preliminary X-ray diffraction studies of an anti-4-hydroxy-3-nitrophenylacetic acid monoclonal antibody Fab fragment complexed with immunizing and heteroclitic haptens.
abstract: The Fab fragment of the anti-4-hydroxy-3-nitrophenylacetic acid monoclonal antibody, 88C6/12 has been crystallized in the presence of the eliciting hapten, 4-hydroxy-3-nitrophenacetyl-epsilon-aminocaproic acid (NP-aminocap) and the heteroclitic iodinated analog, 4-hydroxy-3-iodo-5-nitrophenylacetyl-epsilon-aminocaproic acid (NIP-aminocap). Crystals obtained by precipitation with 32% (w/v) polyethylene glycol 3400 in the presence of 40 to 400 microM of either NP-aminocap or NIP-aminocap, belong to the orthorhombic space group P2(1)2(1)2(1) with cell dimensions a = 81.2 A, b = 86.9 A, c = 131.1 A. The cell volume suggests the presence of two molecules of the complex per asymmetric unit. Analysis of the Patterson function indicates that these two molecules are related by a local 2-fold axis parallel to the crystallographic b axis located at x = 0.218 and z = 0.25.
authors.affiliation: Department of Biophysics, Johns Hopkins University, School of Medicine, Baltimore, MD 21205.
authors.forename: S C
authors.initials: SC
authors.lastname: Yuhasz
authors.forename: X
authors.initials: X
authors.lastname: Ysern
authors.forename: M
authors.initials: M
authors.lastname: Strand
authors.forename: L M
authors.initials: LM
authors.lastname: Amzel
mesh_terms: D000911:Antibodies, Monoclonal; D003460:Crystallization; D006241:Haptens; D046911:Macromolecular Substances; D009596:Nitrophenols / Q000276:immunology*; D010648:Phenylacetates; D014961:X-Ray Diffraction
chemical_list: D000911:Antibodies, Monoclonal; D006241:Haptens; D046911:Macromolecular Substances; D009596:Nitrophenols; D010648:Phenylacetates; C026242:4-hydroxy-5-nitrophenyl acetic acid