Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 140.57 kDa 
• Atom Count: 9012 
• Residue Count: 1133 
• Unique protein chains: 1

1M6B

Structure of the HER3 (ERBB3) Extracellular Domain

• DOI: 10.2210/pdb1M6B/pdb

• Classification: SIGNALING PROTEIN, TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Cricetulus griseus
• Mutation(s): Yes 


• Deposited: 2002-07-15 Released: 2002-08-02 
• Deposition Author(s): Leahy, D.J., Cho, H.-S.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.294 
• R-Value Work: 0.235 
• R-Value Observed: 0.238 

Literature

Structure of the extracellular region of HER3 reveals an interdomain tether.

Cho, H.S., Leahy, D.J.

(2002) Science 297: 1330-1333

• PubMed: 12154198 
• DOI: 10.1126/science.1074611
• Primary Citation of Related Structures:  
  1M6B


• PubMed Abstract: 
  

We have determined the 2.6 angstrom crystal structure of the entire extracellular region of human HER3 (ErbB3), a member of the epidermal growth factor receptor (EGFR) family. The structure consists of four domains with structural homology to domains found in the type I insulin-like growth factor receptor. The HER3 structure reveals a contact between domains II and IV that constrains the relative orientations of ligand-binding domains and provides a structural basis for understanding both multiple-affinity forms of EGFRs and conformational changes induced in the receptor by ligand binding during signaling. These results also suggest new therapeutic approaches to modulating the behavior of members of the EGFR family.

---

Organizational Affiliation: 

Department of Biophysics and Biophysical Chemistry, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Receptor protein-tyrosine kinase erbB-3	A, B	621	Homo sapiens	Mutation(s): 1  Gene Names: ERBB3, HER3 EC: 2.7.10.1
Find proteins for P21860 (Homo sapiens) Explore P21860  Go to UniProtKB:  P21860
NIH Common Fund Data Resources
PHAROS:  P21860 GTEx:  ENSG00000065361

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	C, D	2		N-Glycosylation

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	A, B	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
SO4	B	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.294 
• R-Value Work: 0.235 
• R-Value Observed: 0.238 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 236.26	α = 90
b = 49.62	β = 125.56
c = 190.86	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-07-15 
• Released Date: 2002-08-02 
Deposition Author(s): Leahy, D.J., Cho, H.-S.

Revision History 

• Version 1.0: 2002-08-02
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary