3ZDL

Vinculin head (1-258) in complex with a RIAM fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Riam and Vinculin Binding to Talin are Mutually Exclusive and Regulate Adhesion Assembly and Turnover.

Goult, B.T.Zacharchenko, T.Bate, N.Tsang, R.Hey, F.Gingras, A.R.Elliott, P.R.Roberts, G.C.Ballestrem, C.Critchley, D.R.Barsukov, I.L.

(2013) J.Biol.Chem. 288: 8238

  • DOI: 10.1074/jbc.M112.438119
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Talin activates integrins, couples them to F-actin, and recruits vinculin to focal adhesions (FAs). Here, we report the structural characterization of the talin rod: 13 helical bundles (R1-R13) organized into a compact cluster of four-helix bundles ( ...

    Talin activates integrins, couples them to F-actin, and recruits vinculin to focal adhesions (FAs). Here, we report the structural characterization of the talin rod: 13 helical bundles (R1-R13) organized into a compact cluster of four-helix bundles (R2-R4) within a linear chain of five-helix bundles. Nine of the bundles contain vinculin-binding sites (VBS); R2R3 are atypical, with each containing two VBS. Talin R2R3 also binds synergistically to RIAM, a Rap1 effector involved in integrin activation. Biochemical and structural data show that vinculin and RIAM binding to R2R3 is mutually exclusive. Moreover, vinculin binding requires domain unfolding, whereas RIAM binds the folded R2R3 double domain. In cells, RIAM is enriched in nascent adhesions at the leading edge whereas vinculin is enriched in FAs. We propose a model in which RIAM binding to R2R3 initially recruits talin to membranes where it activates integrins. As talin engages F-actin, force exerted on R2R3 disrupts RIAM binding and exposes the VBS, which recruit vinculin to stabilize the complex.


    Organizational Affiliation

    Department of Biochemistry, University of Leicester, Lancaster Road, Leicester LE1 9HN, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VINCULIN
A
280Gallus gallusMutation(s): 0 
Gene Names: VCL (VINC1)
Find proteins for P12003 (Gallus gallus)
Go to Gene View: VCL
Go to UniProtKB:  P12003
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
AMYLOID BETA A4 PRECURSOR PROTEIN-BINDING FAMILY B MEMBER 1-INTERACTING PROTEIN
B
32Homo sapiensMutation(s): 1 
Gene Names: APBB1IP (PREL1, RARP1, RIAM)
Find proteins for Q7Z5R6 (Homo sapiens)
Go to Gene View: APBB1IP
Go to UniProtKB:  Q7Z5R6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.188 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 51.730α = 90.00
b = 70.030β = 90.00
c = 95.600γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
SCALAdata scaling
PHENIXrefinement
iMOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-13
    Type: Initial release
  • Version 1.1: 2013-02-20
    Type: Database references
  • Version 1.2: 2013-03-06
    Type: Derived calculations, Other
  • Version 1.3: 2013-04-10
    Type: Derived calculations, Other
  • Version 1.4: 2013-04-17
    Type: Database references