1FN4

CRYSTAL STRUCTURE OF FAB198, AN EFFICIENT PROTECTOR OF ACETYLCHOLINE RECEPTOR AGAINST MYASTHENOGENIC ANTIBODIES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of Fab198, an efficient protector of the acetylcholine receptor against myasthenogenic antibodies.

Poulas, K.Eliopoulos, E.Vatzaki, E.Navaza, J.Kontou, M.Oikonomakos, N.Acharya, K.R.Tzartos, S.J.

(2001) Eur J Biochem 268: 3685-3693

  • DOI: https://doi.org/10.1046/j.1432-1327.2001.02274.x
  • Primary Citation of Related Structures:  
    1FN4

  • PubMed Abstract: 

    The crystal structure of the Fab fragment of the rat monoclonal antibody 198, with protective activity for the main immunogenic region of the human muscle acetylcholine receptor against the destructive action of myasthenic antibodies, has been determined and refined to 2.8 A resolution by X-ray crystallographic methods. The mouse anti-lysozyme Fab D1.3 was used as a search model in molecular replacement with the AMORE software. The complementarity determining regions (CDR)-L2, CDR-H1 and CDR-H2 belong to canonical groups. Loops CDR-L3, CDR-H2 and CDR-H3, which seem to make a major contribution to binding, were analyzed and residues of potential importance for antigen-binding are examined. The antigen-binding site was found to be a long crescent-shaped crevice. The structure should serve as a model in the rational design of very high affinity humanized mutants of Fab198, appropriate for therapeutic approaches in the model autoimmune disease myasthenia gravis.


  • Organizational Affiliation

    Department of Biochemistry, Hellenic Pasteur Institute, Athens, Greece.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MONOCLONAL ANTIBODY AGAINST ACETYLCHOLINE RECEPTOR
A, C
211Rattus norvegicusMutation(s): 0 
UniProt
Find proteins for P01835 (Rattus norvegicus)
Explore P01835 
Go to UniProtKB:  P01835
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01835
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
MONOCLONAL ANTIBODY AGAINST ACETYLCHOLINE RECEPTOR
B, D
218Rattus norvegicusMutation(s): 0 
UniProt
Find proteins for P20760 (Rattus norvegicus)
Explore P20760 
Go to UniProtKB:  P20760
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP20760
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.198 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 169.78α = 90
b = 169.78β = 90
c = 182.57γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-09-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance