1FN4

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.294 
  • R-Value Work: 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


  • 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 determ ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MONOCLONAL ANTIBODY AGAINST ACETYLCHOLINE RECEPTOR
A, C
211Rattus norvegicusN/A
Find proteins for P01835 (Rattus norvegicus)
Go to UniProtKB:  P01835
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MONOCLONAL ANTIBODY AGAINST ACETYLCHOLINE RECEPTOR
B, D
218Rattus norvegicusGene Names: Igg-2a
Find proteins for P20760 (Rattus norvegicus)
Go to UniProtKB:  P20760
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.198 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 169.780α = 90.00
b = 169.780β = 90.00
c = 182.570γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
SCALEPACKdata scaling
AMoREphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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