Biological Assembly 1  

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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: 18006.61 
• Atom Count: 1199 
• Residue Count: 162 
• Unique protein chains: 1

2RCZ

Structure of the second PDZ domain of ZO-1

• DOI: 10.2210/pdb2RCZ/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2007-09-20 Released: 2007-10-09 
• Deposition Author(s): Lavie, A., Lye, M.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.7 Å
• R-Value Free: 0.258 
• R-Value Work: 0.204 

Literature

Domain swapping within PDZ2 is responsible for dimerization of ZO proteins.

Fanning, A.S., Lye, M.F., Anderson, J.M., Lavie, A.

(2007) J.Biol.Chem. 282: 37710-37716

• PubMed: 17928286 
• DOI: 10.1074/jbc.M707255200


• PubMed Abstract: 
  

ZO-1 is a multidomain protein involved in cell-cell junctions and contains three PDZ domains, which are necessary for its function in vivo. PDZ domains play a central role in assembling diverse protein complexes through their ability to recognize short peptide motifs on other proteins. We determined the structure of the second of the three PDZ domains of ZO-1, which is known to promote dimerization as well as bind to C-terminal sequences on connexins. The dimer is stabilized by extensive symmetrical domain swapping of beta-strands, which is unlike any other known mechanism of PDZ dimerization. The canonical peptide-binding groove remains intact in both subunits of the PDZ2 dimer and is created by elements contributed from both monomers. This unique structure reveals an additional example of how PDZ domains dimerize and has multiple implications for both peptide binding and oligomerization in vivo.

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Organizational Affiliation: 

Department of Cell and Molecular Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7545, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Tight junction protein ZO-1	A, B	81	Homo sapiens	Mutation(s): 0  Gene Names: TJP1 (ZO1)
Find proteins for Q07157 (Homo sapiens) Go to Gene View: TJP1 Go to UniProtKB:  Q07157

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.7 Å
• R-Value Free: 0.258 
• R-Value Work: 0.204 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 47.750	α = 90.00
b = 33.610	β = 103.64
c = 91.040	γ = 90.00

Software Package:

Software Name	Purpose
PDB_EXTRACT	data extraction
PHASER	phasing
REFMAC	refinement
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-09-20 
• Released Date: 2007-10-09 
• Deposition Author(s): Lavie, A., Lye, M.F.

Revision History 

• Version 1.0: 2007-10-09
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Advisory, Version format compliance