1OPG

OPG2 FAB FRAGMENT


Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the OPG2 Fab. An antireceptor antibody that mimics an RGD cell adhesion site.

Kodandapani, R.Veerapandian, B.Kunicki, T.J.Ely, K.R.

(1995) J.Biol.Chem. 270: 2268-2273


  • PubMed Abstract: 
  • Cell surface receptors called integrins mediate diverse cell adhesion phenomena through recognition of the sequence arginine-glycine-aspartic acid (RGD) present in proteins such as fibronectin and fibrinogen. Platelet aggregation in hemostasis is med ...

    Cell surface receptors called integrins mediate diverse cell adhesion phenomena through recognition of the sequence arginine-glycine-aspartic acid (RGD) present in proteins such as fibronectin and fibrinogen. Platelet aggregation in hemostasis is mediated by the binding of fibrinogen to the gpIIb/IIIa integrin. The OPG2 antibody binds the gpIIb/IIIa receptor and acts as a ligand mimic due to the presence of an arginine-tyrosine-aspartic acid (RYD) sequence in the CDR3 loop of the heavy chain. The RYD loop and side chains are ordered in the 2.0-A resolution crystal structure of the Fab fragment from this antireceptor antibody. Moreover, the RYD loop assumes two clearly defined conformations that may correspond to the orientations of the loop in the free state or bound to integrin. This molecule will serve as a tool for understanding protein-integrin recognition in platelet aggregation and other RGD-mediated cell adhesion interactions.


    Related Citations: 
    • Crystallization of Opg2 Fab Fragment: A Fibrinogen Mimic with Specificity for the Platelet Glycoprotein
      Celikel, R.,Williamson, M.M.,Kunicki, T.J.,Ely, K.R.
      (1992) Acta Crystallogr.,Sect.D 49: 421


    Organizational Affiliation

    Cancer Research Center, La Jolla Cancer Research Foundation, California 92037.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
OPG2 FAB (LIGHT CHAIN)
L
214N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
OPG2 FAB (HEAVY CHAIN)
H
227Mus musculusGene Names: Ighg1 (Igh-4)
Find proteins for P01868 (Mus musculus)
Go to UniProtKB:  P01868
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 93.100α = 90.00
b = 83.800β = 90.00
c = 53.700γ = 90.00
Software Package:
Software NamePurpose
A.J.data collection
XENGENdata reduction
XUONG)data reduction
C.data collection
NILSENdata collection
NIELSENdata reduction
HOWARDdata collection
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-07-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance