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 
  • R-Value Observed: 0.236 

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
  • Primary Citation of Related Structures:  
    3U9U

  • 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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fab Heavy ChainAC224Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Fab Light ChainBD219Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Receptor tyrosine-protein kinase erbB-4EF625Homo sapiensMutation(s): 0 
Gene Names: ERBB4HER4
EC: 2.7.10.1
Find proteins for Q15303 (Homo sapiens)
Explore Q15303 
Go to UniProtKB:  Q15303
NIH Common Fund Data Resources
PHAROS  Q15303
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.121α = 90
b = 110.914β = 90
c = 362.051γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
PHASERphasing
BUSTERrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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