2AFG

2.0 ANGSTROM X-RAY STRUCTURE OF HUMAN ACIDIC FIBROBLAST GROWTH FACTOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

X-ray crystal structure of human acidic fibroblast growth factor.

Blaber, M.DiSalvo, J.Thomas, K.A.

(1996) Biochemistry 35: 2086-2094

  • DOI: 10.1021/bi9521755
  • Also Cited By: 2AXM, 1AXM

  • PubMed Abstract: 
  • Fibroblast growth factors (FGFs) are mitogenic and chemotactic agents for a wide variety of cell types and play a primary role in the regulation of angiogenesis. Angiogenesis is involved in a variety of critical physiological events including organog ...

    Fibroblast growth factors (FGFs) are mitogenic and chemotactic agents for a wide variety of cell types and play a primary role in the regulation of angiogenesis. Angiogenesis is involved in a variety of critical physiological events including organogenesis, wound healing, ischemic collateral circulation, and solid tumor growth. High-resolution structural information is key to understanding the mechanism of action of these growth factors. We report here the X-ray crystal structure of human acidic FGF (aFGF), with data extending to 2.0 angstroms resolution. The crystal contains four independent molecules in the asymmetric unit. Each molecule contains a single bound sulfate ion, in similar juxtapositions. The bound sulfate is stabilized through hydrogen-bond interactions with residues Asn 18, Lys 113, and Lys 118 and defines a potential heparin binding site. The hydrogen bond with the N delta 2 moiety of Asn 18 appears to be the most conserved interaction, being similar to those observed for sulfate ion bound to human basic FGF (bFGF) and similar but not identical to interactions observed for bovine aFGF with heparin analogs. Of the added solvent groups, five ordered water molecules are conserved in each of the four independent structures of human aFGF. These water molecules, located at buried positions, provide hydrogen bonding partnerships with several buried polar groups in the core of the protein. A central interior cavity exists in each of the four structures, with sizes ranging from approximately 20 to 50 angstroms3. The cavity sizes appear to be significantly smaller than that observed in the related protein interleukin-1 beta. The region comprising the high affinity FGF receptor binding site is structurally very similar to the corresponding region from human bFGF, whereas the low affinity site is structurally quite different. The results provide a structural basis for the role of the low affinity binding site in FGF receptor discrimination.


    Related Citations: 
    • Three-Dimensional Structures of Acidic and Basic Fibroblast Growth Factors
      Zhu, X.,Komiya, H.,Chirino, A.,Faham, S.,Fox, G.M.,Arakawa, T.,Hsu, B.T.,Rees, D.C.
      (1991) Science 251: 90
    • Refinement of the Structure of Human Basic Fibroblast Growth Factor at 1.6 Angstroms Resolution and Analysis of Presumed Heparin Binding Sites by Selenate Substitution
      Eriksson, A.E.,Cousens, L.S.,Matthews, B.W.
      (1993) Protein Sci. 2: 1274


    Organizational Affiliation

    Institute of Molecular Biophysics and Department of Chemistry, Florida State University, Tallahassee 32306-3015, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACIDIC FIBROBLAST GROWTH FACTOR
A, B, C, D
140Homo sapiensGene Names: FGF1 (FGFA)
Find proteins for P05230 (Homo sapiens)
Go to Gene View: FGF1
Go to UniProtKB:  P05230
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 37.100α = 90.00
b = 111.700β = 90.50
c = 64.000γ = 90.00
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other