1OCW

Free conformation Ab2 of the IgE SPE-7


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.290 
  • R-Value Observed: 0.266 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Antibody Multispecificity Mediated by Conformational Diversity

James, L.C.Roversi, P.Tawfik, D.

(2003) Science 299: 1362

  • DOI: 10.1126/science.1079731
  • Primary Citation of Related Structures:  
    1OAZ, 1OAY, 1OAX, 1OAU, 1OAR, 1OAQ, 1OCW

  • PubMed Abstract: 
  • A single antibody was shown to adopt different binding-site conformations and thereby bind unrelated antigens. Analysis by both x-ray crystallography and pre-steady-state kinetics revealed an equilibrium between different preexisting isomers, one of ...

    A single antibody was shown to adopt different binding-site conformations and thereby bind unrelated antigens. Analysis by both x-ray crystallography and pre-steady-state kinetics revealed an equilibrium between different preexisting isomers, one of which possessed a promiscuous, low-affinity binding site for aromatic ligands, including the immunizing hapten. A subsequent induced-fit isomerization led to high-affinity complexes with a deep and narrow binding site. A protein antigen identified by repertoire selection made use of an unrelated antibody isomer with a wide, shallow binding site. Conformational diversity, whereby one sequence adopts multiple structures and multiple functions, can increase the effective size of the antibody repertoire but may also lead to autoimmunity and allergy.


    Organizational Affiliation

    Centre for Protein Engineering, Medical Research Council Centre, Hills Road, Cambridge CB2 2HQ, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
IMMUNOGLOBULIN EH121Mus 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
IMMUNOGLOBULIN EL120Mus musculusMutation(s): 0 
Find proteins for P01724 (Mus musculus)
Explore P01724 
Go to UniProtKB:  P01724
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.290 
  • R-Value Observed: 0.266 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.545α = 90
b = 79.545β = 90
c = 67.703γ = 90
Software Package:
Software NamePurpose
SHELXL-97refinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-02-05
    Type: Initial release
  • Version 1.1: 2013-10-30
    Changes: Derived calculations, Other, Source and taxonomy, Version format compliance