1FBI

CRYSTAL STRUCTURE OF A CROSS-REACTION COMPLEX BETWEEN FAB F9.13.7 AND GUINEA-FOWL LYSOZYME


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of a cross-reaction complex between Fab F9.13.7 and guinea fowl lysozyme.

Lescar, J.Pellegrini, M.Souchon, H.Tello, D.Poljak, R.J.Peterson, N.Greene, M.Alzari, P.M.

(1995) J Biol Chem 270: 18067-18076

  • DOI: 10.1074/jbc.270.30.18067
  • Primary Citation of Related Structures:  
    1FBI

  • PubMed Abstract: 
  • The crystal structure of the complex between the cross-reacting antigen Guinea fowl lysozyme and the Fab from monoclonal antibody F9.13.7, raised against hen egg lysozyme, has been determined by x-ray diffraction to 3-A resolution. The antibody inter ...

    The crystal structure of the complex between the cross-reacting antigen Guinea fowl lysozyme and the Fab from monoclonal antibody F9.13.7, raised against hen egg lysozyme, has been determined by x-ray diffraction to 3-A resolution. The antibody interacts with exposed residues of an alpha-helix and surrounding loops adjacent to the lysozyme active site cleft. The epitope of lysozyme bound by antibody F9.13.7 overlaps almost completely with that bound by antibody HyHEL10; the same 12 residues of the antigen interact with the two antibodies. The antibodies, however, have different combining sites with no sequence homology at any of their complementarity-determining regions and show a dissimilar pattern of cross-reactivity with heterologous antigens. Side chain mobility of epitope residues contributes to confer steric and electrostatic complementarity to differently shaped combining sites, allowing functional mimicry to occur. The capacity of two antibodies that have different fine specificities to bind the same area of the antigen emphasizes the operational character of the definition of an antigenic determinant. This example demonstrates that degenerate binding of the same structural motif does not require the existence of sequence homology or other chemical similarities between the different binding sites.


    Related Citations: 
    • Crystal Structures of Pheasant and Guinea-Fowl Egg-White Lysozymes
      Lescar, J., Souchon, H., Alzari, P.
      (1994) Protein Sci 3: 788
    • Crystallization, Preliminary X-Ray Diffraction Study, and Crystal Packing of a Complex between Anti-Hen Lysozyme Antibody and Guinea-Fowl Lysozyme
      Lescar, J., Riottot, M.-M., Souchon, H., Chitarra, V., Bentley, G., Navaza, J., Alzari, P., Poljak, R.
      (1993) Proteins 15: 209

    Organizational Affiliation

    Unité d'Immunologie Structurale, Institut Pasteur, Paris, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
GUINEA FOWL LYSOZYMEXY129Numida meleagrisMutation(s): 0 
Gene Names: LYZ
EC: 3.2.1.17
Find proteins for P00704 (Numida meleagris)
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Go to UniProtKB:  P00704
Protein Feature View
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  • Reference Sequence
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
IGG1 F9.13.7 FAB (LIGHT CHAIN)LP214Mus musculusMutation(s): 0 
Gene Names: Igkc
Find proteins for P01837 (Mus musculus)
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Go to UniProtKB:  P01837
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
IGG1 F9.13.7 FAB (HEAVY CHAIN)HQ221Mus musculusMutation(s): 0 
Gene Names: Ighg1Igh-4
Find proteins for P01868 (Mus musculus)
Explore P01868 
Go to UniProtKB:  P01868
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.7α = 90
b = 195.5β = 108.5
c = 50.2γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-02-27
    Type: Initial release
  • Version 1.1: 2008-03-21
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance