6FQ4

Structure of Chlamydial virulence factor TarP and vinculin head domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.89 Å
  • R-Value Free: 0.346 
  • R-Value Work: 0.286 
  • R-Value Observed: 0.289 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Chlamydial virulence factor TarP mimics talin to disrupt the talin-vinculin complex.

Whitewood, A.J.Singh, A.K.Brown, D.G.Goult, B.T.

(2018) FEBS Lett 592: 1751-1760

  • DOI: 10.1002/1873-3468.13074
  • Primary Citation of Related Structures:  
    6FQ4

  • PubMed Abstract: 
  • Vinculin is a central component of mechanosensitive adhesive complexes that form between cells and the extracellular matrix. A myriad of infectious agents mimic vinculin binding sites (VBS), enabling them to hijack the adhesion machinery and facilitate cellular entry ...

    Vinculin is a central component of mechanosensitive adhesive complexes that form between cells and the extracellular matrix. A myriad of infectious agents mimic vinculin binding sites (VBS), enabling them to hijack the adhesion machinery and facilitate cellular entry. Here, we report the structural and biochemical characterisation of VBS from the chlamydial virulence factor TarP. Whilst the affinities of isolated VBS peptides from TarP and talin for vinculin are similar, their behaviour in larger fragments is markedly different. In talin, VBS are cryptic and require mechanical activation to bind vinculin, whereas the TarP VBS are located in disordered regions, and so are constitutively active. We demonstrate that the TarP VBS can uncouple talin:vinculin complexes, which may lead to adhesion destabilisation.


    Organizational Affiliation

    School of Biosciences, University of Kent, Canterbury, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
VinculinA280Gallus gallusMutation(s): 0 
Gene Names: VCLVINC1
UniProt
Find proteins for P12003 (Gallus gallus)
Explore P12003 
Go to UniProtKB:  P12003
Protein Feature View
Expand
  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TarP-VBS1B20Chlamydia caviaeMutation(s): 0 
UniProt
Find proteins for Q824H6 (Chlamydophila caviae (strain ATCC VR-813 / DSM 19441 / GPIC))
Explore Q824H6 
Go to UniProtKB:  Q824H6
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.89 Å
  • R-Value Free: 0.346 
  • R-Value Work: 0.286 
  • R-Value Observed: 0.289 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.807α = 90
b = 66.873β = 90
c = 95.832γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/N007336/1
Human Frontier Science Program (HFSP)RGP00001/2016

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-09
    Type: Initial release
  • Version 1.1: 2018-06-13
    Changes: Data collection, Database references