2FJH

Structure of the B20-4 Fab, a phage derived Fab fragment, in complex with VEGF

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


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

Literature

Structure-function studies of two synthetic anti-vascular endothelial growth factor Fabs and comparison with the Avastin Fab.

Fuh, G., Wu, P., Liang, W.C., Ultsch, M., Lee, C.V., Moffat, B., Wiesmann, C.

(2006) J.Biol.Chem. 281: 6625-6631

  • DOI: 10.1074/jbc.M507783200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • In the quest to discover new research tools and to develop better agents in the fight against cancer, two antibodies, G6 and B20-4, were isolated from synthetic antibody phage libraries. Unlike the AVASTINtrade mark antibody, a recently approved agen ...

    In the quest to discover new research tools and to develop better agents in the fight against cancer, two antibodies, G6 and B20-4, were isolated from synthetic antibody phage libraries. Unlike the AVASTINtrade mark antibody, a recently approved agent for the treatment of patients with colorectal cancer, B20-4 and G6 bind and block both human and murine vascular endothelial growth factor (VEGF). Here we have analyzed and compared the binding epitopes on VEGF for these three antibodies using alanine-scanning mutagenesis and structural analyses. The epitopes recognized by both synthetic antibodies are conserved between human and mouse VEGF, and they match closely to the receptor epitopes both structurally and functionally. In contrast, the Avastin epitope overlaps minimally with the receptor binding surface and centers around a residue that is not conserved in mouse. Our structural and functional analyses elucidate the cross-species reactivity of all three antibodies and emphasize the potential advantages of antibody generation using phage display as the resulting antibodies do not depend on sequence differences across species and preferentially target natural protein-protein interaction surfaces.

    Organizational Affiliation: 

    Department of Protein Engineering, Genentech, Inc., South San Francisco, California 94080, USA. gml@gene.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vascular endothelial growth factor A
V, W
102Homo sapiensGene Names: VEGFA (VEGF)
Find proteins for P15692 (Homo sapiens)
Go to Gene View: VEGFA
Go to UniProtKB:  P15692
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fab fragment light chain
L, A
214N/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fab fragment heavy chain
H, B
228N/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.198 
  • Space Group: P 31 1 2
Unit Cell:
Length (Å)Angle (°)
a = 165.538α = 90.00
b = 165.538β = 90.00
c = 150.548γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2006-01-02 
  • Released Date: 2006-02-07 
  • Deposition Author(s): Wiesmann, C.

Revision History 

  • Version 1.0: 2006-02-07
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance