3MBX

Crystal structure of chimeric antibody X836


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 

wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

On the domain pairing in chimeric antibodies.

Teplyakov, A.Obmolova, G.Carton, J.M.Gao, W.Zhao, Y.Gilliland, G.L.

(2010) Mol Immunol 47: 2422-2426

  • DOI: https://doi.org/10.1016/j.molimm.2010.05.002
  • Primary Citation of Related Structures:  
    3MBX

  • PubMed Abstract: 

    A chimeric antibody was constructed from two unrelated antibodies by combining their heavy and light chains. The "double chimera" consists of the mouse variable regions of different specificity (IL-13 and EMMPRIN) and the constant regions of different origin (mouse and human). The Fab fragment of this chimeric antibody was expressed in mammalian cells, and the crystal structure was determined at 1.6A resolution. Despite a large number of amino acid substitutions in the double chimera with respect to the parent antibodies, the heavy and light chains associate into a stable molecule. Comparison to the structure of one of the parent antibodies reveals that the variable domain interface, as well as the conformation of antigen-binding loops, is preserved without major rearrangements due to conservation of amino acids in key positions. Comparison to the structures of the all-human and all-mouse constant domains indicates a remarkable plasticity of the inter-chain interface that can tolerate residue relocations of up to 6A.


  • Organizational Affiliation

    Centocor R&D, Inc., 145 King of Prussia Road, Radnor, PA 19087, USA. ateplyak@its.jnj.com


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
X836 LIGHT CHAINA [auth L]220Mus musculusMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
X836 HEAVY CHAINB [auth H]230Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
PCA
Query on PCA
B [auth H]L-PEPTIDE LINKINGC5 H7 N O3GLN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.93α = 90
b = 99.84β = 90
c = 125.33γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
MOLREPphasing
REFMACrefinement
d*TREKdata reduction
d*TREKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-06-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2019-12-25
    Changes: Derived calculations, Polymer sequence
  • Version 2.1: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description