2W65

Anti citrullinated Collagen type 2 antibody acc4 in complex with a citrullinated peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.21 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure and pathogenicity of antibodies specific for citrullinated collagen type II in experimental arthritis.

Uysal, H.Bockermann, R.Nandakumar, K.S.Sehnert, B.Bajtner, E.Engstrom, A.Serre, G.Burkhardt, H.Thunnissen, M.M.Holmdahl, R.

(2009) J Exp Med 206: 449-462

  • DOI: 10.1084/jem.20081862
  • Primary Citation of Related Structures:  
    2W60, 2W65

  • PubMed Abstract: 
  • Antibodies to citrulline-modified proteins have a high diagnostic value in rheumatoid arthritis (RA). However, their biological role in disease development is still unclear. To obtain insight into this question, a panel of mouse monoclonal antibodies ...

    Antibodies to citrulline-modified proteins have a high diagnostic value in rheumatoid arthritis (RA). However, their biological role in disease development is still unclear. To obtain insight into this question, a panel of mouse monoclonal antibodies was generated against a major triple helical collagen type II (CII) epitope (position 359-369; ARGLTGRPGDA) with or without arginines modified by citrullination. These antibodies bind cartilage and synovial tissue, and mediate arthritis in mice. Detection of citrullinated CII from RA patients' synovial fluid demonstrates that cartilage-derived CII is indeed citrullinated in vivo. The structure determination of a Fab fragment of one of these antibodies in complex with a citrullinated peptide showed a surprising beta-turn conformation of the peptide and provided information on citrulline recognition. Based on these findings, we propose that autoimmunity to CII, leading to the production of antibodies specific for both native and citrullinated CII, is an important pathogenic factor in the development of RA.


    Organizational Affiliation

    Center for Molecular Protein Science, Biomedical Center I11, Lund University, 221 00 Lund, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ANTI-CITRULLINATED COLLAGEN TYPE II FAB ACC4AC218Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ANTI-CITRULLINATED COLLAGEN TYPE II FAB ACC4BD217Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
COLLAGEN DERIVED PEPTIDE PCII-CIT1EF9Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CIR
Query on CIR
E,FL-PEPTIDE LINKINGC6 H13 N3 O3ARG
HYP
Query on HYP
E,FL-PEPTIDE LINKINGC5 H9 N O3PRO
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.21 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.2α = 90
b = 127.8β = 106
c = 71.9γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-24
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-08-09
    Changes: Data collection, Database references