1IGJ

26-10 FAB:DIGOXIN COMPLEX-AFFINITY AND SPECIFICITY DUE TO SURFACE COMPLEMENTARITY

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.176 

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This is version 1.2 of the entry. See complete history. 


Literature

26-10 Fab-digoxin complex: affinity and specificity due to surface complementarity.

Jeffrey, P.D., Strong, R.K., Sieker, L.C., Chang, C.Y., Campbell, R.L., Petsko, G.A., Haber, E., Margolies, M.N., Sheriff, S.

(1993) Proc Natl Acad Sci U S A 90: 10310-10314

  • DOI: 10.1073/pnas.90.21.10310
  • Primary Citation of Related Structures:  
    1IGJ, 1IGI

  • PubMed Abstract: 

    • We have determined the three-dimensional structures of the antigen-binding fragment of the anti-digoxin monoclonal antibody 26-10 in the uncomplexed state at 2.7 A resolution and as a complex with digoxin at 2.5 A resolution. Neither the antibody nor dig ...

    We have determined the three-dimensional structures of the antigen-binding fragment of the anti-digoxin monoclonal antibody 26-10 in the uncomplexed state at 2.7 A resolution and as a complex with digoxin at 2.5 A resolution. Neither the antibody nor digoxin undergoes any significant conformational changes upon forming the complex. Digoxin interacts primarily with the antibody heavy chain and is oriented such that the carbohydrate groups are exposed to solvent and the lactone ring is buried in a deep pocket at the bottom of the combining site. Despite extensive interactions between antibody and antigen, no hydrogen bonds or salt links are formed between 26-10 and digoxin. Thus the 26-10-digoxin complex is unique among the known three-dimensional structures of antibody-antigen complexes in that specificity and high affinity arise primarily from shape complementarity.

    Related Citations: 
    • Crystallization of the Fab Fragment of a Monoclonal Anti-Digoxin Antibody and its Complex with Digoxin
      Rose, D.R., Seaton, B.A., Petsko, G.A., Novotny, J., Margolies, M.N., Locke, E., Haber, E.
      (1983) J Mol Biol 165: 203
    • Solution of a Fab (26-10)Digoxin Complex by Generalized Molecular Replacement
      Brunger, A.T.
      (1991) Acta Crystallogr A 47: 195
    Organizational Affiliation: 

    Bristol-Myers Squibb Pharmaceutical Research Institute, Princeton, NJ 08543-4000.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
IGG2A-KAPPA 26-10 FAB (LIGHT CHAIN) A, C219Mus 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
IGG2A-KAPPA 26-10 FAB (HEAVY CHAIN) B, D218Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DGX
Query on DGX
Download Ideal Coordinates CCD File 
B, D
DIGOXIN
C41 H64 O14
LTMHDMANZUZIPE-PUGKRICDSA-N		 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
DGXKd:  0.10000000149011612   nM  Binding MOAD
DGXKd :  0.10000000149011612   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.176 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.16α = 90
b = 164.43β = 108.37
c = 70.01γ = 90
Software Package:
Software NamePurpose
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1993-04-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance