1O9Y

Crystal structure of the C-terminal domain of the HrcQb protein from Pseudomonas syringae pv. phaseolicola


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of Hrcqb-C, a Conserved Component of the Bacterial Type III Secretion Systems.

Fadouloglou, V.E.Tampakaki, A.P.Glykos, N.M.Bastaki, M.N.Hadden, J.M.Phillips, S.E.Panopoulos, N.J.Kokkinidis, M.

(2004) Proc Natl Acad Sci U S A 101: 70

  • DOI: 10.1073/pnas.0304579101
  • Primary Citation of Related Structures:  
    1O9Y

  • PubMed Abstract: 
  • Type III secretion systems enable plant and animal bacterial pathogens to deliver virulence proteins into the cytosol of eukaryotic host cells, causing a broad spectrum of diseases including bacteremia, septicemia, typhoid fever, and bubonic plague in mammals, and localized lesions, systemic wilting, and blights in plants ...

    Type III secretion systems enable plant and animal bacterial pathogens to deliver virulence proteins into the cytosol of eukaryotic host cells, causing a broad spectrum of diseases including bacteremia, septicemia, typhoid fever, and bubonic plague in mammals, and localized lesions, systemic wilting, and blights in plants. In addition, type III secretion systems are also required for biogenesis of the bacterial flagellum. The HrcQ(B) protein, a component of the secretion apparatus of Pseudomonas syringae with homologues in all type III systems, has a variable N-terminal and a conserved C-terminal domain (HrcQ(B)-C). Here, we report the crystal structure of HrcQ(B)-C and show that this domain retains the ability of the full-length protein to interact with other type III components. A 3D analysis of sequence conservation patterns reveals two clusters of residues potentially involved in protein-protein interactions. Based on the analogies between HrcQ(B) and its flagellum homologues, we propose that HrcQ(B)-C participates in the formation of a C-ring-like assembly.


    Related Citations: 
    • Structural Studies of the Hrp Secretion System: Expression, Purification, Crystallization and Preliminary X-Ray Analysis of the C-Terminal Domain of the Hrcqb Protein from Pseudomonas Syringae Pv. Phaseolicola.
      Fadouloglou, V.E., Tampakaki, A.P., Panopoulos, N.J., Kokkinidis, M.
      (2001) Acta Crystallogr D Biol Crystallogr 57: 1689

    Organizational Affiliation

    Department of Biology, University of Crete, PO Box 2208, GR-71409 Heraklion, Crete, Greece.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HRCQ2ABCD84Pseudomonas syringaeMutation(s): 0 
Find proteins for O85094 (Pseudomonas savastanoi pv. phaseolicola)
Explore O85094 
Go to UniProtKB:  O85094
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.018α = 90
b = 27.696β = 99.68
c = 98.85γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
SOLVE/RESOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-04
    Type: Initial release
  • Version 1.1: 2014-09-03
    Changes: Database references, Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance
  • Version 1.2: 2015-04-15
    Changes: Database references
  • Version 1.3: 2018-01-31
    Changes: Database references, Source and taxonomy