3LTG

Crystal structure of the Drosophila Epidermal Growth Factor Receptor ectodomain complexed with a low affinity Spitz mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.427 
  • R-Value Work: 0.406 
  • R-Value Observed: 0.408 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural basis for negative cooperativity in growth factor binding to an EGF receptor.

Alvarado, D.Klein, D.E.Lemmon, M.A.

(2010) Cell 142: 568-579

  • DOI: 10.1016/j.cell.2010.07.015
  • Primary Citation of Related Structures:  
    3LTG, 3LTF

  • PubMed Abstract: 
  • Transmembrane signaling by the epidermal growth factor receptor (EGFR) involves ligand-induced dimerization and allosteric regulation of the intracellular tyrosine kinase domain. Crystallographic studies have shown how ligand binding induces dimeriza ...

    Transmembrane signaling by the epidermal growth factor receptor (EGFR) involves ligand-induced dimerization and allosteric regulation of the intracellular tyrosine kinase domain. Crystallographic studies have shown how ligand binding induces dimerization of the EGFR extracellular region but cannot explain the "high-affinity" and "low-affinity" classes of cell-surface EGF-binding sites inferred from curved Scatchard plots. From a series of crystal structures of the Drosophila EGFR extracellular region, we show here how Scatchard plot curvature arises from negatively cooperative ligand binding. The first ligand-binding event induces formation of an asymmetric dimer with only one bound ligand. The unoccupied site in this dimer is structurally restrained, leading to reduced affinity for binding of the second ligand, and thus negative cooperativity. Our results explain the cell-surface binding characteristics of EGF receptors and suggest how individual EGFR ligands might stabilize distinct dimeric species with different signaling properties.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6059, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Epidermal growth factor receptorAC601Drosophila melanogasterMutation(s): 0 
Gene Names: torpedoEgfrc-erbBDERtopCG10079
EC: 2.7.10 (PDB Primary Data), 2.7.10.1 (UniProt)
Find proteins for P04412 (Drosophila melanogaster)
Explore P04412 
Go to UniProtKB:  P04412
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein spitzD52Drosophila melanogasterMutation(s): 0 
Gene Names: SpitzspiCG10334
Find proteins for Q01083 (Drosophila melanogaster)
Explore Q01083 
Go to UniProtKB:  Q01083
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.427 
  • R-Value Work: 0.406 
  • R-Value Observed: 0.408 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.75α = 90
b = 120.15β = 90
c = 274.7γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance