1OAZ

IgE Fv SPE7 complexed with a recombinant thioredoxin

• PDB DOI: https://doi.org/10.2210/pdb1OAZ/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Escherichia coli, Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-01-21 Released: 2004-01-15 
• Deposition Author(s): James, L.C., Roversi, P., Tawfik, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.78 Å
• R-Value Free: 0.276 
• R-Value Work: 0.208 

Literature

Antibody Multispecificity Mediated by Conformational Diversity

James, L.C., Roversi, P., Tawfik, D.

(2003) Science 299: 1362

• PubMed: 12610298 
• DOI: https://doi.org/10.1126/science.1079731
• Primary Citation of Related Structures:  
  1OAQ, 1OAR, 1OAU, 1OAX, 1OAY, 1OAZ, 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 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.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 2 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 77.37 kDa 
• Atom Count: 5,639 
• Modelled Residue Count: 690 
• Deposited Residue Count: 710 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
THIOREDOXIN 1	A, B	123	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P0AA25 (Escherichia coli (strain K12)) Explore P0AA25  Go to UniProtKB:  P0AA25

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
IMMUNOGLOBULIN E	C [auth H], D [auth J]	122	Mus musculus	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
IMMUNOGLOBULIN E	E [auth L], F [auth N]	110	Mus musculus	Mutation(s): 0
UniProt
Find proteins for P01724 (Mus musculus) Explore P01724  Go to UniProtKB:  P01724

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.78 Å
• R-Value Free: 0.276 
• R-Value Work: 0.208 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.352	α = 90
b = 79.467	β = 90
c = 170.763	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-01-15 
Deposition Author(s): James, L.C., Roversi, P., Tawfik, D.

Revision History  

• Version 1.0: 2004-01-15
  Type: Initial release
  
• Version 1.1: 2013-10-30
  Changes: Derived calculations, Other, Source and taxonomy, Version format compliance
• Version 1.2: 2024-11-13
  Changes: Data collection, Database references, Other, Structure summary