4OEO

High resolution crystal structure of the unliganded ZO-1 PDZ1 domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of a Key Factor Regulating the Affinity between the Zonula Occludens First PDZ Domain and Claudins.

Nomme, J.Antanasijevic, A.Caffrey, M.Van Itallie, C.M.Anderson, J.M.Fanning, A.S.Lavie, A.

(2015) J.Biol.Chem. 290: 16595-16606

  • DOI: 10.1074/jbc.M115.646695
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The molecular seal between epithelial cells, called the tight junction (TJ), is built by several membrane proteins, with claudins playing the most prominent role. The scaffold proteins of the zonula occludens family are required for the correct local ...

    The molecular seal between epithelial cells, called the tight junction (TJ), is built by several membrane proteins, with claudins playing the most prominent role. The scaffold proteins of the zonula occludens family are required for the correct localization of claudins and hence formation of the TJ. The intracellular C terminus of claudins binds to the N-terminal PDZ domain of zonula occludens proteins (PDZ1). Of the 23 identified human claudin proteins, nine possess a tyrosine at the -6 position. Here we show that the claudin affinity for PDZ1 is dependent on the presence or absence of this tyrosine and that the affinity is reduced if the tyrosine is modified by phosphorylation. The PDZ1 β2-β3 loop undergoes a significant conformational change to accommodate this tyrosine. Cell culture experiments support a regulatory role for this tyrosine. Plasticity has been recognized as a critical property of TJs that allow cell remodeling and migration. Our work provides a molecular framework for how TJ plasticity may be regulated.


    Organizational Affiliation

    From the Department of Biochemistry and Molecular Genetics, University of Illinois, Chicago, Illinois 60607.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tight junction protein ZO-1
A, B, C
107Homo sapiensMutation(s): 0 
Gene Names: TJP1 (ZO1)
Find proteins for Q07157 (Homo sapiens)
Go to Gene View: TJP1
Go to UniProtKB:  Q07157
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

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Download CCD File 
A, B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
12P
Query on 12P

Download SDF File 
Download CCD File 
B, C
DODECAETHYLENE GLYCOL
POLYETHYLENE GLYCOL PEG400
C24 H50 O13
WRZXKWFJEFFURH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.195 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 104.993α = 90.00
b = 60.473β = 124.26
c = 62.217γ = 90.00
Software Package:
Software NamePurpose
CrystalCleardata collection
XDSdata reduction
XDSdata scaling
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-01-13 
  • Released Date: 2015-01-14 
  • Deposition Author(s): Nomme, J., Lavie, A.

Revision History 

  • Version 1.0: 2015-01-14
    Type: Initial release
  • Version 1.1: 2015-07-01
    Type: Database references
  • Version 1.2: 2015-07-22
    Type: Database references