title: Crystal structure of basic fibroblast growth factor at 1.6 A resolution.
abstract: We have determined the crystal structures of two types of human basic fibroblast growth factor, the serine analogue and the wild-type, at 1.6 and 2.5 A resolution, respectively. Two good heavy atom derivatives were found and used for multiple isomorphous replacement phasing. The atomic coordinates were refined using the Hendrickson & Konnert program for stereochemically restrained refinement against structure factors. The crystallographic R factors were reduced to 15.3% for the serine analogue structure and 16.0% for the wild-type structure. The serine analogue and wild-type structures have been found to be almost identical, the root-mean-square deviation between the corresponding C alpha atoms being 0.11 A. Their structures are composed of twelve beta-strands forming a barrel and three loops. Their molecules have an approximate threefold internal symmetry and are similar in architecture to that of interleukin-1 beta. A possible heparin-binding site, which comprises five basic residues, Lys119, Arg120, Lys125, Lys129, and Lys135, has been revealed by calculating the electrostatic potential energy.
authors.affiliation: Institute for Protein Research, Osaka University.
authors.forename: H
authors.initials: H
authors.lastname: Ago
authors.forename: Y
authors.initials: Y
authors.lastname: Kitagawa
authors.forename: A
authors.initials: A
authors.lastname: Fujishima
authors.forename: Y
authors.initials: Y
authors.lastname: Matsuura
authors.forename: Y
authors.initials: Y
authors.lastname: Katsube
mesh_terms: D000595:Amino Acid Sequence; D003196:Computer Graphics; D016222:Fibroblast Growth Factor 2 / Q000737:chemistry* / Q000235:genetics; D006801:Humans; D008958:Models, Molecular; D011487:Protein Conformation; D012694:Serine; D013816:Thermodynamics; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D016222:Fibroblast Growth Factor 2; D012694:Serine