3G9W

Crystal Structure of Talin2 F2-F3 in Complex with the Integrin Beta1D Cytoplasmic Tail


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 

Starting Models: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The structure of an integrin/talin complex reveals the basis of inside-out signal transduction

Anthis, N.J.Wegener, K.L.Ye, F.Kim, C.Goult, B.T.Lowe, E.D.Vakonakis, I.Bate, N.Critchley, D.R.Ginsberg, M.H.Campbell, I.D.

(2009) EMBO J 28: 3623-3632

  • DOI: https://doi.org/10.1038/emboj.2009.287
  • Primary Citation of Related Structures:  
    3G9W

  • PubMed Abstract: 

    Fundamental to cell adhesion and migration, integrins are large heterodimeric membrane proteins that uniquely mediate inside-out signal transduction, whereby adhesion to the extracellular matrix is activated from within the cell by direct binding of talin to the cytoplasmic tail of the beta integrin subunit. Here, we report the first structure of talin bound to an authentic full-length beta integrin tail. Using biophysical and whole cell measurements, we show that a specific ionic interaction between the talin F3 domain and the membrane-proximal helix of the beta tail disrupts an integrin alpha/beta salt bridge that helps maintain the integrin inactive state. Second, we identify a positively charged surface on the talin F2 domain that precisely orients talin to disrupt the heterodimeric integrin transmembrane (TM) complex. These results show key structural features that explain the ability of talin to mediate inside-out TM signalling.


  • Organizational Affiliation

    Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK. nick.anthis@gmail.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Talin-2
A, B
223Mus musculusMutation(s): 0 
Gene Names: Tln2
Membrane Entity: Yes 
UniProt
Find proteins for Q71LX4 (Mus musculus)
Explore Q71LX4 
Go to UniProtKB:  Q71LX4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ71LX4
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Integrin beta-1D
C, D
52Homo sapiensMutation(s): 0 
Gene Names: ITGB1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P05556 (Homo sapiens)
Explore P05556 
Go to UniProtKB:  P05556
PHAROS:  P05556
GTEx:  ENSG00000150093 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05556
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.26α = 90
b = 108.72β = 90
c = 131.85γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
PHASERphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-10-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2014-02-05
    Changes: Database references
  • Version 1.3: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description