1BBJ

CRYSTAL STRUCTURE OF A CHIMERIC FAB' FRAGMENT OF AN ANTIBODY BINDING TUMOUR CELLS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Observed: 0.176 

wwPDB Validation 3D Report Full Report



Literature

Crystal structure of a chimeric Fab' fragment of an antibody binding tumour cells.

Brady, R.L.Edwards, D.J.Hubbard, R.E.Jiang, J.S.Lange, G.Roberts, S.M.Todd, R.J.Adair, J.R.Emtage, J.S.King, D.J.Low, D.C.

(1992) J Mol Biol 227: 253-264

  • DOI: 10.1016/0022-2836(92)90695-g
  • Primary Citation of Related Structures:  
    1BBJ

  • PubMed Abstract: 
  • The crystal structure of a chimeric Fab' fragment of a monoclonal antibody is presented. The Fab' comprises the murine light chain and heavy chain variable domains of the carcinoma-binding antibody B72.3 fused to the constant domain of human kappa, a ...

    The crystal structure of a chimeric Fab' fragment of a monoclonal antibody is presented. The Fab' comprises the murine light chain and heavy chain variable domains of the carcinoma-binding antibody B72.3 fused to the constant domain of human kappa, and the first constant domain and hinge domain of human gamma 4, respectively. A model for the Fab' has been determined by molecular replacement and refined to a resolution of 3.1 A with an R-factor of 17.6%. The additional residues that distinguish a Fab' from a Fab fragment are seen to be disordered in the crystals. The H3 hypervariable loop is short and adopts a sharp hairpin turn in a conformation that results from an interaction between the lysine side-chain of H93 and the main-chain carbonyl group of H96. The remaining hypervariable loops display conformations similar to those predicted from the canonical structures approach, although loop H2 is apparently displaced by a salt-bridge formed between H55 Asp and the neighbouring H73 Lys. These and other features of the structure likely to be important in grafting the hypervariable loops to an otherwise human framework are discussed.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Diffraction Study of a Chimeric Fab' Fragment of an Antibody Binding Tumour Cells
      Brady, R.L., Hubbard, R.E., King, D.J., Low, D.C., Roberts, S.M., Todd, R.J.
      (1991) J Mol Biol 219: 603

    Organizational Affiliation

    Department of Chemistry, University of York, U.K.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
IGG4-KAPPA B72.3 FAB (LIGHT CHAIN)AL211Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
IGG4-KAPPA B72.3 FAB (HEAVY CHAIN)BH212Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Find proteins for P01861 (Homo sapiens)
Explore P01861 
Go to UniProtKB:  P01861
NIH Common Fund Data Resources
PHAROS  P01861
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
B,HL-PEPTIDE LINKINGC5 H7 N O3GLN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Observed: 0.176 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.5α = 90
b = 93.2β = 90
c = 208.8γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-02-05
    Changes: Source and taxonomy
  • Version 2.0: 2019-12-25
    Changes: Database references, Derived calculations, Other, Polymer sequence