3WSQ

Structure of HER2 with an Fab


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Insights into HER2 signaling from step-by-step optimization of anti-HER2 antibodies.

Fu, W.Wang, Y.Zhang, Y.Xiong, L.Takeda, H.Ding, L.Xu, Q.He, L.Tan, W.Bethune, A.N.Zhou, L.

(2014) MAbs 6: 978-990

  • DOI: 10.4161/mabs.28786

  • PubMed Abstract: 
  • HER2, a ligand-free tyrosine kinase receptor of the HER family, is frequently overexpressed in breast cancer. The anti-HER2 antibody trastuzumab has shown significant clinical benefits in metastatic breast cancer; however, resistance to trastuzumab i ...

    HER2, a ligand-free tyrosine kinase receptor of the HER family, is frequently overexpressed in breast cancer. The anti-HER2 antibody trastuzumab has shown significant clinical benefits in metastatic breast cancer; however, resistance to trastuzumab is common. The development of monoclonal antibodies that have complementary mechanisms of action results in a more comprehensive blockade of ErbB2 signaling, especially HER2/HER3 signaling. Use of such antibodies may have clinical benefits if these antibodies can become widely accepted. Here, we describe a novel anti-HER2 antibody, hHERmAb-F0178C1, which was isolated from a screen of a phage display library. A step-by-step optimization method was employed to maximize the inhibitory effect of this anti-HER2 antibody. Crystallographic analysis was used to determine the three-dimensional structure to 3.5 Å resolution, confirming that the epitope of this antibody is in domain III of HER2. Moreover, this novel anti-HER2 antibody exhibits superior efficacy in blocking HER2/HER3 heterodimerization and signaling, and its use in combination with pertuzumab has a synergistic effect. Characterization of this antibody revealed the important role of a ligand binding site within domain III of HER2. The results of this study clearly indicate the unique potential of hHERmAb-F0178C1, and its complementary inhibition effect on HER2/HER3 signaling warrants its consideration as a promising clinical treatment.


    Organizational Affiliation

    Central Laboratory; Navy General Hospital; Beijing, PR China; Cancer Center; PLA General Hospital; PLA Postgraduate School of Medicine; Beijing, PR China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Receptor tyrosine-protein kinase erbB-2
A
564Homo sapiensMutation(s): 0 
Gene Names: ERBB2 (HER2, MLN19, NEU, NGL)
EC: 2.7.10.1
Find proteins for P04626 (Homo sapiens)
Go to Gene View: ERBB2
Go to UniProtKB:  P04626
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Antibody Light Chain
L
215N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Antibody Heavy Chain
H
218N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.221 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 72.562α = 90.00
b = 82.460β = 90.91
c = 110.339γ = 90.00
Software Package:
Software NamePurpose
PHASESphasing
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
bioteXdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-03-25
    Type: Initial release
  • Version 1.1: 2017-11-22
    Type: Refinement description