Biological Assembly 1  

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 78236.41 
• Atom Count: 5150 
• Residue Count: 677 
• Unique protein chains: 2

1NQL

Structure of the extracellular domain of human epidermal growth factor (EGF) receptor in an inactive (low pH) complex with EGF.

• DOI: 10.2210/pdb1NQL/pdb

• Classification: HORMONE/GROWTH FACTOR RECEPTOR
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda, Escherichia coli


• Deposited: 2003-01-21 Released: 2003-03-11 
• Deposition Author(s): Ferguson, K.M., Lemmon, M.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.310 
• R-Value Work: 0.241 

Literature

EGF activates its receptor by removing interactions that auto-inhibit ectodomain dimerization

Ferguson, K.M., Berger, M.B., Mendrola, J.M., Cho, H., Leahy, D.J., Lemmon, M.A.

(2003) Mol.Cell 11: 507-517

• PubMed: 12620237 


• PubMed Abstract: 
  

Epidermal growth factor (EGF) receptor is the prototype of the ErbB (HER) family receptor tyrosine kinases (RTKs), which regulate cell growth and differentiation and are implicated in many human cancers. EGF activates its receptor by inducing dimerization of the 621 amino acid EGF receptor extracellular region. We describe the 2.8 A resolution crystal structure of this entire extracellular region (sEGFR) in an unactivated state. The structure reveals an autoinhibited configuration, where the dimerization interface recently identified in activated sEGFR structures is completely occluded by intramolecular interactions. To activate the receptor, EGF binding must promote a large domain rearrangement that exposes this dimerization interface. This contrasts starkly with other RTK activation mechanisms and suggests new approaches for designing ErbB receptor antagonists.

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Organizational Affiliation: 

Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
epidermal growth factor receptor	A	624	Homo sapiens	Mutation(s): 0  Gene Names: EGFR (ERBB, ERBB1, HER1) EC: 2.7.10.1
Find proteins for P00533 (Homo sapiens) Go to Gene View: EGFR Go to UniProtKB:  P00533

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
epidermal growth factor	B	53	Homo sapiens	Mutation(s): 0  Gene Names: EGF
Find proteins for P01133 (Homo sapiens) Go to Gene View: EGF Go to UniProtKB:  P01133

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
BMA	A	BETA-D-MANNOSE C6 H12 O6 WQZGKKKJIJFFOK-RWOPYEJCSA-N
NAG	A	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.310 
• R-Value Work: 0.241 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 119.170	α = 90.00
b = 103.660	β = 119.27
c = 101.490	γ = 90.00

Software Package:

Software Name	Purpose
MOSFLM	data reduction
CCP4	data scaling
REFMAC	refinement
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-01-21 
• Released Date: 2003-03-11 
• Deposition Author(s): Ferguson, K.M., Lemmon, M.A.

Revision History 

• Version 1.0: 2003-03-11
  Type: Initial release
• Version 1.1: 2008-04-29
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Non-polymer description, Version format compliance