2BHV

Structure of ComB10 of the Com Type IV secretion system of Helicobacter pylori


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structures of Two Core Subunits of the Bacterial Type Iv Secretion System, Virb8 from Brucella Suis and Comb10 from Helicobacter Pylori

Terradot, L.Bayliss, R.Oomen, C.Leonard, G.Baron, C.Waksman, G.

(2005) Proc.Natl.Acad.Sci.USA 102: 4596

  • DOI: 10.1073/pnas.0408927102
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Type IV secretion systems (T4SSs) are commonly used secretion machineries in Gram-negative bacteria. They are used in the infection of human, animal, or plant cells and the propagation of antibiotic resistance. The T4SS apparatus spans both membranes ...

    Type IV secretion systems (T4SSs) are commonly used secretion machineries in Gram-negative bacteria. They are used in the infection of human, animal, or plant cells and the propagation of antibiotic resistance. The T4SS apparatus spans both membranes of the bacterium and generally is composed of 12 proteins, named VirB1-11 and VirD4 after proteins of the canonical Agrobacterium tumefaciens T4SS. The periplasmic core complex of VirB8/VirB10 structurally and functionally links the cytoplasmic NTPases of the system with its outer membrane and pilus components. Here we present crystal structures of VirB8 of Brucella suis, the causative agent of brucellosis, and ComB10, a VirB10 homolog of Helicobacter pylori, the causative agent of gastric ulcers. The structures of VirB8 and ComB10 resemble known folds, albeit with novel secondary-structure modifications unique to and conserved within their respective families. Both proteins crystallized as dimers, providing detailed predictions about their self associations. These structures make a substantial contribution to the repertoire of T4SS component structures and will serve as springboards for future functional and protein-protein interaction studies by using knowledge-based site-directed and deletion mutagenesis.


    Organizational Affiliation

    Institute of Structural Molecular Biology, Malet Street, London WC1E 7HX, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
COMB10
A, B, C, D, E, F
246Helicobacter pylori (strain ATCC 700392 / 26695)Mutation(s): 0 
Find proteins for O24883 (Helicobacter pylori (strain ATCC 700392 / 26695))
Go to UniProtKB:  O24883
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.257 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 69.735α = 90.00
b = 139.411β = 90.00
c = 168.442γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SHARPphasing
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-03-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance