1M8O

Platelet integrin alfaIIb-beta3 cytoplasmic domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with favorable non-bond energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A Structural mechanism of integrin alfaiib beta3 "Inside-out" Activation as regulated by its cytoplasmic face.

Vinogradova, O.Velyvis, A.Velyviene, A.Hu, B.Haas, T.A.Plow, E.F.Qin, J.

(2002) Cell 110: 587-597


  • PubMed Abstract: 
  • Activation of the ligand binding function of integrin heterodimers requires transmission of an "inside-out" signal from their small intracellular segments to their large extracellular domains. The structure of the cytoplasmic domain of a prototypic i ...

    Activation of the ligand binding function of integrin heterodimers requires transmission of an "inside-out" signal from their small intracellular segments to their large extracellular domains. The structure of the cytoplasmic domain of a prototypic integrin alpha(IIb)beta(3) has been solved by NMR and reveals multiple hydrophobic and electrostatic contacts within the membrane-proximal helices of its alpha and the beta cytoplasmic tails. The interface interactions are disrupted by point mutations or the cytoskeletal protein talin that are known to activate the receptor. These results provide a structural mechanism by which a handshake between the alpha and the beta cytoplasmic tails restrains the integrin in a resting state and unclasping of this interaction triggers the inside-out conformational signal that leads to receptor activation.


    Organizational Affiliation

    Structural Biology Program, Cleveland, OH 44195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
platelet integrin alfaIIb subunit: cytoplasmic domain
A
20Homo 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
platelet integrin beta3 subunit: cytoplasmic domain
B
47Homo sapiensMutation(s): 0 
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: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with favorable non-bond energy 
  • Olderado: 1M8O Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-09-18
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance