3IJH

Structure of S67-27 in Complex with Ko


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The role of CDR H3 in antibody recognition of a synthetic analog of a lipopolysaccharide antigen.

Brooks, C.L.Blackler, R.J.Sixta, G.Kosma, P.Muller-Loennies, S.Brade, L.Hirama, T.Mackenzie, C.R.Brade, H.Evans, S.V.

(2010) Glycobiology 20: 138-147

  • DOI: 10.1093/glycob/cwp150
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In order to explore the structural basis for adaptability in near germline monoclonal antibodies (mAb), we have examined the specificity of the promiscuous mAb S67-27 to both naturally derived carbohydrate antigens and a variety of synthetic nonnatur ...

    In order to explore the structural basis for adaptability in near germline monoclonal antibodies (mAb), we have examined the specificity of the promiscuous mAb S67-27 to both naturally derived carbohydrate antigens and a variety of synthetic nonnatural antigens based on the bacterial lipopolysaccharide component 3-deoxy-alpha-D-manno-oct-2-ulosonic acid (Kdo). One such analog, a 7-O-methyl (7-O-Me) Kdo disaccharide, was found to bind to the antibody with at least 30-fold higher affinity than any other antigen tested. The structure of S67-27 in complex with this analog and three other naturally occurring Kdo antigens revealed that the enhanced affinity of the mAb for the synthetic analog was accomplished by the strategic positioning of CDR H3 away from a conserved Kdo binding pocket that allowed the formation of new antibody-antigen contacts. Furthermore, the comparison of this structure with the structures of related mAbs revealed how the position and structure of CDR H3 influence the specificity or promiscuity of near-germline carbohydrate-recognizing antibodies by altering the architecture of the combining site.


    Organizational Affiliation

    Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC V8P 3P6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Immunoglobulin light chain (IGG3)
A, C
219N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Immunoglobulin heavy chain (IGG3)
B, D
226N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
B, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
KO2
Query on KO2

Download SDF File 
Download CCD File 
B, C
prop-2-en-1-yl D-glycero-alpha-D-talo-oct-2-ulopyranosidonic acid
C11 H18 O9
MJWRJGHIYDIAQR-RUEXUQCSSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
KO2Kd: 100000 nM BINDINGMOAD
KO2Kd: 100000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.460α = 90.00
b = 127.880β = 90.00
c = 156.210γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata processing
d*TREKdata reduction
PHASERphasing
PHENIXrefinement
d*TREKdata scaling
CrystalCleardata collection
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance