Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 42.69 kDa 
• Atom Count: 3362 
• Modelled Residue Count: 382 
• Deposited Residue Count: 382 
• Unique protein chains: 1

1CS6

N-TERMINAL FRAGMENT OF AXONIN-1 FROM CHICKEN

• PDB DOI: 10.2210/pdb1CS6/pdb

• Classification: CELL ADHESION
• Organism(s): Gallus gallus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-08-17 Released: 2000-05-19 
• Deposition Author(s): Freigang, J., Proba, K., Diederichs, K., Sonderegger, P., Welte, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.257 
• R-Value Work: 0.226 
• R-Value Observed: 0.226 

Literature

The crystal structure of the ligand binding module of axonin-1/TAG-1 suggests a zipper mechanism for neural cell adhesion.

Freigang, J., Proba, K., Leder, L., Diederichs, K., Sonderegger, P., Welte, W.

(2000) Cell 101: 425-433

• PubMed: 10830169 
• DOI: 10.1016/s0092-8674(00)80852-1
• Primary Citation of Related Structures:  
  1CS6


• PubMed Abstract: 
  

We have determined the crystal structure of the ligand binding fragment of the neural cell adhesion molecule axonin-1/TAG-1 comprising the first four immunoglobulin (Ig) domains. The overall structure of axonin-1(Ig1-4) is U-shaped due to contacts between domains 1 and 4 and domains 2 and 3. In the crystals, these molecules are aligned in a string with adjacent molecules oriented in an anti-parallel fashion and their C termini perpendicular to the string. This arrangement suggests that cell adhesion by homophilic axonin-1 interaction occurs by the formation of a linear zipper-like array in which the axonin-1 molecules are alternately provided by the two apposed membranes. In accordance with this model, mutations in a loop critical for the formation of the zipper resulted in the loss of the homophilic binding capacity of axonin-1.

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Organizational Affiliation: 

Faculty of Biology, University of Konstanz, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
AXONIN-1	A	382	Gallus gallus	Mutation(s): 0  Gene Names: CNTN2
UniProt
Find proteins for P28685 (Gallus gallus) Explore P28685  Go to UniProtKB:  P28685

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	B [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.257 
• R-Value Work: 0.226 
• R-Value Observed: 0.226 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.583	α = 90
b = 45.54	β = 96.14
c = 99.548	γ = 90

Software Package:

Software Name	Purpose
MAR345	data collection
XDS	data reduction
SHARP	phasing
CNS	refinement
XDS	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-08-17 
• Released Date: 2000-05-19 
Deposition Author(s): Freigang, J., Proba, K., Diederichs, K., Sonderegger, P., Welte, W.

Revision History  

• Version 1.0: 2000-05-19
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2017-10-04
  Changes: Refinement description