3U9U

Crystal Structure of Extracellular Domain of Human ErbB4/Her4 in complex with the Fab fragment of mAb1479


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Proteolytic processing of ErbB4 in breast cancer.

Hollmen, M.Liu, P.Kurppa, K.Wildiers, H.Reinvall, I.Vandorpe, T.Smeets, A.Deraedt, K.Vahlberg, T.Joensuu, H.Leahy, D.J.Schoffski, P.Elenius, K.

(2012) Plos One 7: e39413-e39413

  • DOI: 10.1371/journal.pone.0039413

  • PubMed Abstract: 
  • ErbB4 is a receptor tyrosine kinase that can signal by a mechanism involving proteolytic release of intracellular and extracellular receptor fragments. Proteolysis-dependent signaling of ErbB4 has been proposed to be enhanced in breast cancer, mainly ...

    ErbB4 is a receptor tyrosine kinase that can signal by a mechanism involving proteolytic release of intracellular and extracellular receptor fragments. Proteolysis-dependent signaling of ErbB4 has been proposed to be enhanced in breast cancer, mainly based on immunohistochemical localization of intracellular epitopes in the nuclei. To more directly address the processing of ErbB4 in vivo, an ELISA was developed to quantify cleaved ErbB4 ectodomain from serum samples. Analysis of 238 breast cancer patients demonstrated elevated quantities of ErbB4 ectodomain in the serum (≥ 40 ng/mL) in 21% of the patients, as compared to 0% of 30 healthy controls (P = 0.002). Significantly, the elevated serum ectodomain concentration did not correlate with the presence of nuclear ErbB4 immunoreactivity in matched breast cancer tissue samples. However, elevated serum ectodomain concentration was associated with the premenopausal status at diagnosis (P = 0.04), and estradiol enhanced ErbB4 cleavage in vitro. A 3.4 Å X-ray crystal structure of a complex of ErbB4 ectodomain and the Fab fragment of anti-ErbB4 mAb 1479 localized the binding site of mAb 1479 on ErbB4 to a region on subdomain IV encompassing the residues necessary for ErbB4 cleavage. mAb 1479 also significantly blocked ErbB4 cleavage in breast cancer cell xenografts in vivo, and the inhibition of cleavage was associated with suppression of xenograft growth. These data indicate that ErbB4 processing is enhanced in breast cancer tissue in vivo, and that ErbB4 cleavage can be stimulated by estradiol and targeted with mAb 1479.


    Organizational Affiliation

    Medicity Research Laboratories, Department of Medical Biochemistry and Genetics, University of Turku, Turku, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fab Heavy Chain
A, C
224N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fab Light Chain
B, D
219N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Receptor tyrosine-protein kinase erbB-4
E, F
625Homo sapiensMutation(s): 0 
Gene Names: ERBB4 (HER4)
EC: 2.7.10.1
Find proteins for Q15303 (Homo sapiens)
Go to Gene View: ERBB4
Go to UniProtKB:  Q15303
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.234 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 83.121α = 90.00
b = 110.914β = 90.00
c = 362.051γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
DENZOdata reduction
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
BUSTERrefinement
Blu-Icedata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-31
    Type: Initial release
  • Version 1.1: 2017-11-08
    Type: Source and taxonomy