4AG6

Structure of VirB4 of Thermoanaerobacter pseudethanolicus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 

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This is version 1.1 of the entry. See complete history


Literature

Structure of the Virb4 ATPase, Alone and Bound to the Core Complex of a Type Iv Secretion System.

Wallden, K.Williams, R.Yan, J.Lian, P.W.Wang, L.Thalassinos, K.Orlova, E.V.Waksman, G.

(2012) Proc Natl Acad Sci U S A 109: 11348

  • DOI: 10.1073/pnas.1201428109
  • Primary Citation of Related Structures:  
    4AG5, 4AG6

  • PubMed Abstract: 
  • Type IV secretion (T4S) systems mediate the transfer of proteins and DNA across the cell envelope of bacteria. These systems play important roles in bacterial pathogenesis and in horizontal transfer of antibiotic resistance. The VirB4 ATPase of the T ...

    Type IV secretion (T4S) systems mediate the transfer of proteins and DNA across the cell envelope of bacteria. These systems play important roles in bacterial pathogenesis and in horizontal transfer of antibiotic resistance. The VirB4 ATPase of the T4S system is essential for both the assembly of the system and substrate transfer. In this article, we present the crystal structure of the C-terminal domain of Thermoanaerobacter pseudethanolicus VirB4. This structure is strikingly similar to that of another T4S ATPase, VirD4, a protein that shares only 12% sequence identity with VirB4. The VirB4 domain purifies as a monomer, but the full-length protein is observed in a monomer-dimer equilibrium, even in the presence of nucleotides and DNAs. We also report the negative stain electron microscopy structure of the core complex of the T4S system of the Escherichia coli pKM101 plasmid, with VirB4 bound. In this structure, VirB4 is also monomeric and bound through its N-terminal domain to the core's VirB9 protein. Remarkably, VirB4 is observed bound to the side of the complex where it is ideally placed to play its known regulatory role in substrate transfer.


    Organizational Affiliation

    Institute of Structural and Molecular Biology, Department of Biological Sciences, Birkbeck, London WC1E 7HX, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TYPE IV SECRETORY PATHWAY VIRB4 COMPONENTS-LIKE PROTEINABCD392Thermoanaerobacter pseudethanolicusMutation(s): 0 
Find proteins for B0KAW2 (Thermoanaerobacter pseudethanolicus (strain ATCC 33223 / 39E))
Explore B0KAW2 
Go to UniProtKB:  B0KAW2
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,B,C,DL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.286α = 90
b = 112.765β = 90
c = 156.579γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-04
    Type: Initial release
  • Version 1.1: 2012-07-25
    Changes: Database references