Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 48079.65 
• Atom Count: 3368 
• Residue Count: 438 
• Unique protein chains: 1

1FF5

STRUCTURE OF E-CADHERIN DOUBLE DOMAIN

• DOI: 10.2210/pdb1FF5/pdb

• Classification: CELL ADHESION
• Organism(s): Mus musculus
• Expression System: Escherichia coli


• Deposited: 2000-07-25 Released: 2000-08-23 
• Deposition Author(s): Pertz, O., Bozic, D., Koch, A.W., Fauser, C., Brancaccio, A., Engel, J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.93 Å

Literature

A new crystal structure, Ca2+ dependence and mutational analysis reveal molecular details of E-cadherin homoassociation.

Pertz, O., Bozic, D., Koch, A.W., Fauser, C., Brancaccio, A., Engel, J.

(1999) EMBO J. 18: 1738-1747

• PubMed: 10202138 
• DOI: 10.1093/emboj/18.7.1738


• PubMed Abstract: 
  

Electron microscopy of ECADCOMP, a recombinant E-cadherin ectodomain pentamerized by the assembly domain of cartilage oligomeric matrix protein, has been used to analyze the role of cis-dimerization and trans-interaction in the homophilic association of this cell adhesion molecule. The Ca2+ dependency of both interactions was investigated. Low Ca2+ concentrations (50 microM) stabilized the rod-like structure of E-cadherin. At medium Ca2+ concentration (500 microM), two adjacent ectodomains in a pentamer formed cis-dimers. At high Ca2+ concentration (>1 mM), two cis-dimers from different pentamers formed a trans-interaction. The X-ray structure of an N-terminal domain pair of E-cadherin revealed two molecules per asymmetric unit in an intertwisted X-shaped arrangement with closest contacts in the Ca2+-binding region between domains 1 and 2. Contrary to previous data, Trp2 was docked in the hydrophobic cavity of its own molecule, and was therefore not involved in cis-dimerization of two molecules. This was supported further by W2A and A80I (a residue involved in the hydrophobic cavity surrounding Trp2) mutations in ECADCOMP which both led to abrogation of the trans- but not the cis-interaction. Structural and biochemical data suggest a link between Ca2+ binding in the millimolar range and Trp2 docking, both events being essential for the trans-association.

---

Organizational Affiliation: 

Department of Biophysical Chemistry, Biozentrum, University of Basel, Klingelbergstrasse 70, 4056 Basel, Switzerland.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
EPITHELIAL CADHERIN	A, B	219	Mus musculus	Mutation(s): 0  Gene Names: Cdh1
Find proteins for P09803 (Mus musculus) Go to UniProtKB:  P09803

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CA	A, B	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.93 Å
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 122.500	α = 90.00
b = 80.560	β = 113.98
c = 73.440	γ = 90.00

Software Package:

Software Name	Purpose
ROTAVATA	data scaling
AMoRE	phasing
CCP4	data scaling
X-PLOR	refinement
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-07-25 
• Released Date: 2000-08-23 
• Deposition Author(s): Pertz, O., Bozic, D., Koch, A.W., Fauser, C., Brancaccio, A., Engel, J.

Revision History 

• Version 1.0: 2000-08-23
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-04
  Type: Refinement description