2XKN

Crystal structure of the Fab fragment of the anti-EGFR antibody 7A7


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.145 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the Fab Fragment of the Anti-Murine Egfr Antibody 7A7 and Exploration of its Receptor Binding Site.

Talavera, A.Mackenzie, J.Garrido, G.Friemann, R.Lopez-Requena, A.Moreno, E.Krengel, U.

(2011) Mol Immunol 48: 1578

  • DOI: 10.1016/j.molimm.2011.03.016
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The EGF receptor is an important target of cancer immunotherapies. The 7A7 monoclonal antibody has been raised against the murine EGFR, but it cross-reacts with the human receptor. The results from experiments using immune-competent mice can therefor ...

    The EGF receptor is an important target of cancer immunotherapies. The 7A7 monoclonal antibody has been raised against the murine EGFR, but it cross-reacts with the human receptor. The results from experiments using immune-competent mice can therefore, in principle, be extrapolated to the corresponding scenario in humans. In this work we report the crystal structure of the 7A7 Fab at an effective resolution of 1.4Å. The antibody binding site comprises a deep pocket, located at the interface between the light and heavy chains, with major contributions from CDR loops H1, H2, H3 and L1. Binding experiments show that 7A7 recognizes a site on the EGFR extracellular domain that is not accessible in its most stable conformations, but that becomes exposed upon treatment with a tyrosine kinase inhibitor. This suggests a recognition mechanism similar to that proposed for mAb 806.


    Organizational Affiliation

    Department of Chemistry, University of Oslo, PO Box 1033 Blindern, NO-0315 Oslo, Norway. talavera@cim.sld.cu



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ANTI-EGFR ANTIBODY 7A7A, C223Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ANTI-EGFR ANTIBODY 7A7B, D216Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PE4
Query on PE4

Download CCD File 
B, D
2-{2-[2-(2-{2-[2-(2-ETHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL
C16 H34 O8
PJWQOENWHPEPKI-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.145 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 169.034α = 90
b = 57.327β = 122.51
c = 121.023γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-15
    Type: Initial release
  • Version 1.1: 2011-08-31
    Changes: Database references, Refinement description, Source and taxonomy, Version format compliance