3TJ6

human vinculin head domain (Vh1, residues 1-258) in complex with the vinculin binding site of the surface cell antigen 4 (sca4-VBS-C; residues 812-835) from Rickettsia rickettsii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.76 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The rickettsia surface cell antigen 4 applies mimicry to bind to and activate vinculin.

Park, H.Lee, J.H.Gouin, E.Cossart, P.Izard, T.

(2011) J.Biol.Chem. 286: 35096-35103

  • DOI: 10.1074/jbc.M111.263855
  • Primary Citation of Related Structures:  3TJ5

  • PubMed Abstract: 
  • Pathogenic Rickettsia species cause high morbidity and mortality, especially R. prowazekii, the causative agent of typhus. Like many intracellular pathogens, Rickettsia exploit the cytoskeleton to enter and spread within the host cell. Here we report ...

    Pathogenic Rickettsia species cause high morbidity and mortality, especially R. prowazekii, the causative agent of typhus. Like many intracellular pathogens, Rickettsia exploit the cytoskeleton to enter and spread within the host cell. Here we report that the cell surface antigen sca4 of Rickettsia co-localizes with vinculin in cells at sites of focal adhesions in sca4-transfected cells and that sca4 binds to and activates vinculin through two vinculin binding sites (VBSs) that are conserved across all Rickettsia. Remarkably, this occurs through molecular mimicry of the vinculin-talin interaction that is also seen with the IpaA invasin of the intracellular pathogen Shigella, where binding of these VBSs to the vinculin seven-helix bundle head domain (Vh1) displaces intramolecular interactions with the vinculin tail domain that normally clamp vinculin in an inactive state. Finally, the vinculinĀ·sca4-VBS crystal structures reveal that vinculin adopts a new conformation when bound to the C-terminal VBS of sca4. Collectively, our data define the mechanism by which sca4 activates vinculin and interacts with the actin cytoskeleton, and they suggest important roles for vinculin in Rickettsia pathogenesis.


    Organizational Affiliation

    Cell Adhesion Laboratory, Department of Cancer Biology, The Scripps Research Institute, Jupiter, Florida 33458, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vinculin
A
257Homo sapiensGene Names: VCL
Find proteins for P18206 (Homo sapiens)
Go to Gene View: VCL
Go to UniProtKB:  P18206
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Antigenic heat-stable 120 kDa protein
B
23Rickettsia rickettsii (strain Iowa)N/A
Find proteins for B0BXR4 (Rickettsia rickettsii (strain Iowa))
Go to UniProtKB:  B0BXR4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.76 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.193 
  • Space Group: I 21 3
Unit Cell:
Length (Å)Angle (°)
a = 141.373α = 90.00
b = 141.373β = 90.00
c = 141.373γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
Blu-Icedata collection
AutoPROCdata scaling
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-07
    Type: Initial release
  • Version 1.1: 2011-11-02
    Type: Database references
  • Version 1.2: 2013-05-01
    Type: Other
  • Version 1.3: 2017-11-08
    Type: Refinement description