1QG3

CRYSTAL STRUCTURE OF A TANDEM PAIR OF FIBRONECTIN TYPE III DOMAINS FROM THE CYTOPLASMIC TAIL OF INTEGRIN ALPHA6 BETA4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a tandem pair of fibronectin type III domains from the cytoplasmic tail of integrin alpha6beta4.

de Pereda, J.M.Wiche, G.Liddington, R.C.

(1999) EMBO J. 18: 4087-4095

  • DOI: 10.1093/emboj/18.15.4087

  • PubMed Abstract: 
  • The integrin alpha6beta4 is an essential component of hemidesmosomes but it also plays a dynamic role in invasive carcinoma cells. The cytoplasmic tail of the beta4 subunit is uniquely large among integrins and includes two pairs of fibronectin type ...

    The integrin alpha6beta4 is an essential component of hemidesmosomes but it also plays a dynamic role in invasive carcinoma cells. The cytoplasmic tail of the beta4 subunit is uniquely large among integrins and includes two pairs of fibronectin type III domains separated by a connecting segment. Here we describe the crystal structure of the first tandem domain pair, a module that is critical for alpha6beta4 function. The structure reveals a novel interdomain interface and candidate protein-binding sites, including a large acidic cleft formed from the surfaces of both domains and a prominent loop that is reminiscent of the RGD integrin-binding loop of fibronectin. This is the first crystal structure of either a hemidesmosome component or an integrin cytoplasmic domain, and it will enable the intracellular functions of alpha6beta4 to be dissected at the atomic level.


    Organizational Affiliation

    Department of Biochemistry, University of Leicester, Leicester LE1 7RH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (INTEGRIN BETA-4 SUBUNIT)
A, B
195Homo sapiensMutation(s): 0 
Gene Names: ITGB4
Find proteins for P16144 (Homo sapiens)
Go to Gene View: ITGB4
Go to UniProtKB:  P16144
Small Molecules
Ligands 2 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
CAC
Query on CAC

Download SDF File 
Download CCD File 
A, B
CACODYLATE ION
dimethylarsinate
C2 H6 As O2
OGGXGZAMXPVRFZ-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.201 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 59.040α = 90.00
b = 59.040β = 90.00
c = 246.050γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
CCP4model building
CCP4phasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-08-20
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance