2K9J

Integrin alphaIIb-beta3 transmembrane complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 21 
  • Conformers Submitted: 21 
  • Selection Criteria: all calculated structures submitted 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The structure of the integrin alphaIIbbeta3 transmembrane complex explains integrin transmembrane signalling

Lau, T.L.Kim, C.Ginsberg, M.H.Ulmer, T.S.

(2009) Embo J. 28: 1351-1361

  • DOI: 10.1038/emboj.2009.63

  • PubMed Abstract: 
  • Heterodimeric integrin adhesion receptors regulate cell migration, survival and differentiation in metazoa by communicating signals bi-directionally across the plasma membrane. Protein engineering and mutagenesis studies have suggested that the disso ...

    Heterodimeric integrin adhesion receptors regulate cell migration, survival and differentiation in metazoa by communicating signals bi-directionally across the plasma membrane. Protein engineering and mutagenesis studies have suggested that the dissociation of a complex formed by the single-pass transmembrane (TM) segments of the alpha and beta subunits is central to these signalling events. Here, we report the structure of the integrin alphaIIbbeta3 TM complex, structure-based site-directed mutagenesis and lipid embedding estimates to reveal the structural event that underlies the transition from associated to dissociated states, that is, TM signalling. The complex is stabilized by glycine-packing mediated TM helix crossing within the extracellular membrane leaflet, and by unique hydrophobic and electrostatic bridges in the intracellular leaflet that mediate an unusual, asymmetric association of the 24- and 29-residue alphaIIb and beta3 TM helices. The structurally unique, highly conserved integrin alphaIIbbeta3 TM complex rationalizes bi-directional signalling and represents the first structure of a heterodimeric TM receptor complex.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Integrin alpha-IIb light chain
A
42Homo sapiensMutation(s): 0 
Gene Names: ITGA2B (GP2B, ITGAB)
Find proteins for P08514 (Homo sapiens)
Go to Gene View: ITGA2B
Go to UniProtKB:  P08514
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Integrin beta-3
B
43Homo sapiensMutation(s): 1 
Gene Names: ITGB3 (GP3A)
Find proteins for P05106 (Homo sapiens)
Go to Gene View: ITGB3
Go to UniProtKB:  P05106
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 21 
  • Conformers Submitted: 21 
  • Selection Criteria: all calculated structures submitted 
  • Olderado: 2K9J Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-03-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance