1JNL

Crystal Structure of Fab-Estradiol Complexes


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Highly specific anti-estradiol antibodies: structural characterisation and binding diversity.

Monnet, C.Bettsworth, F.Stura, E.A.Du, M.H.Menez, R.Derrien, L.Zinn-Justin, S.Gilquin, B.Sibai, G.Battail-Poirot, N.Jolivet, M.Menez, A.Arnaud, M.Ducancel, F.Charbonnier, J.B.

(2002) J Mol Biol 315: 699-712

  • DOI: 10.1006/jmbi.2001.5284
  • Primary Citation of Related Structures:  
    1JNL, 1JNH, 1JNN, 1JN6

  • PubMed Abstract: 
  • Subtle modulation of antibody-binding properties by protein engineering often lies with an accurate structural and energetic description of how an antigen is recognised. Thus, with the intent to increase the affinity and add a bias in favour of natur ...

    Subtle modulation of antibody-binding properties by protein engineering often lies with an accurate structural and energetic description of how an antigen is recognised. Thus, with the intent to increase the affinity and add a bias in favour of natural estradiol compared with its chemically modified immunogen, we have determined the crystal structure of two anti-estradiol monoclonal antibodies, 10G6D6 and 17E12E5. Although generated against the same estradiol derivative, these antibodies share little sequence identity, which is reflected in dissimilar binding pockets and in different positioning of the steroid. In both antibodies the characteristic 17-hydroxyl group is buried deeply at the bottom of hydrophobic pockets and stabilised by hydrogen bonds. Apart from this similarity, the steroid is oriented differently in the respective binding pockets. The high specificity of both antibodies has been mapped out, and even closely related steroids show low cross-reactivity. The structural studies of the complex formed between 10G6D6 and 6-CMO-estradiol have identified contacts between the 6-CMO coupling linker and an arginine residue from the heavy chain CDR2 segment. This segment is now being targeted by random mutagenesis to select mutants with a preference for natural estradiol compared to the branched hapten.


    Organizational Affiliation

    Département d'Ingénierie et d'Etude des Protéines, CEA, CE Saclay, Gif-sur-Yvette Cedex, 91191, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
monoclonal anti-estradiol 17E12E5 immunoglobulin kappa chainL211Mus musculusMutation(s): 0 
Find proteins for Q7TS98 (Mus musculus)
Explore Q7TS98 
Go to UniProtKB:  Q7TS98
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
monoclonal anti-estradiol 17E12E5 immunoglobulin gamma-1 chainH216Mus musculusMutation(s): 0 
Gene Names: Igh
Find proteins for Q99LC4 (Mus musculus)
Explore Q99LC4 
Go to UniProtKB:  Q99LC4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.206 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.95α = 90
b = 143.24β = 90
c = 53.37γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-02-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance