1UZ6

anti-Lewis X Fab fragment uncomplexed


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of an Anti-Lewis X Fab Fragment in Complex with its Lewis X Antigen

Van Roon, A.M.M.Pannu, N.S.De Vrind, J.P.M.Van Der Marel, G.A.Van Boom, J.H.Hokke, C.H.Deelder, A.M.Abrahams, J.P.

(2004) Structure 12: 1227

  • DOI: 10.1016/j.str.2004.05.008
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Lewis X trisaccharide is pivotal in mediating specific cell-cell interactions. Monoclonal antibody 291-2G3-A, which was generated from mice infected with schistosomes, has been shown to recognize the Lewis X trisaccharide. Here we describe the st ...

    The Lewis X trisaccharide is pivotal in mediating specific cell-cell interactions. Monoclonal antibody 291-2G3-A, which was generated from mice infected with schistosomes, has been shown to recognize the Lewis X trisaccharide. Here we describe the structure of the Fab fragment of 291-2G3-A, with Lewis X, to 1.8 A resolution. The crystallographic analysis revealed that the antigen binding site is a rather shallow binding pocket, and residues from all six complementary determining regions of the antibody contact all sugar residues. The high specificity of the binding pocket does not result in high affinity; the K(D) determined by isothermal calorimetry is 11 microM. However, this affinity is in the same range as for other sugar-antibody complexes. The detailed understanding of the antibody-Lewis X interaction revealed by the crystal structure may be helpful in the design of better diagnostic tools for schistosomiasis and for studying Lewis X-mediated cell-cell interactions by antibody interference.


    Organizational Affiliation

    Department of Biophysical Structural Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IGG FAB (IGG3, KAPPA) LIGHT CHAIN 291-2G3-A
E, L, M, V
218N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
IGG FAB (IGG3, KAPPA) HEAVY CHAIN 291-2G3-A
F, H, P, W
217N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
E, L, M, V
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.198 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 67.405α = 86.48
b = 71.559β = 71.32
c = 104.790γ = 83.26
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
MOLREPphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-06-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance