4P40

Chlamydia pneumoniae CopN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.20 Å
  • R-Value Free: 0.162 
  • R-Value Work: 0.143 
  • R-Value Observed: 0.144 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Biochemical and Structural Insights into Microtubule Perturbation by CopN from Chlamydia pneumoniae.

Nawrotek, A.Guimaraes, B.G.Velours, C.Subtil, A.Knossow, M.Gigant, B.

(2014) J Biol Chem 289: 25199-25210

  • DOI: 10.1074/jbc.M114.568436
  • Primary Citation of Related Structures:  
    4P40, 4P3Z

  • PubMed Abstract: 
  • Although the actin network is commonly hijacked by pathogens, there are few reports of parasites targeting microtubules. The proposed member of the LcrE protein family from some Chlamydia species (e.g. pCopN from C. pneumoniae) binds tubulin and inhibits microtubule assembly in vitro ...

    Although the actin network is commonly hijacked by pathogens, there are few reports of parasites targeting microtubules. The proposed member of the LcrE protein family from some Chlamydia species (e.g. pCopN from C. pneumoniae) binds tubulin and inhibits microtubule assembly in vitro. From the pCopN structure and its similarity with that of MxiC from Shigella, we definitively confirm CopN as the Chlamydia homolog of the LcrE family of bacterial proteins involved in the regulation of type III secretion. We have also investigated the molecular basis for the pCopN effect on microtubules. We show that pCopN delays microtubule nucleation and acts as a pure tubulin-sequestering protein at steady state. It targets the β subunit interface involved in the tubulin longitudinal self-association in a way that inhibits nucleotide exchange. pCopN contains three repetitions of a helical motif flanked by disordered N- and C-terminal extensions. We have identified the pCopN minimal tubulin-binding region within the second and third repeats. Together with the intriguing observation that C. trachomatis CopN does not bind tubulin, our data support the notion that, in addition to the shared function of type III secretion regulation, these proteins have evolved different functions in the host cytosol. Our results provide a mechanistic framework for understanding the C. pneumoniae CopN-specific inhibition of microtubule assembly.


    Organizational Affiliation

    From the Laboratoire d'Enzymologie et Biochimie Structurales (LEBS), Centre de Recherche de Gif, CNRS, 91198 Gif sur Yvette, France, gigant@lebs.cnrs-gif.fr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CopNA425Chlamydia pneumoniaeMutation(s): 0 
Gene Names: 
Find proteins for Q9Z8L4 (Chlamydia pneumoniae)
Explore Q9Z8L4 
Go to UniProtKB:  Q9Z8L4
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
MLY
Query on MLY
AL-PEPTIDE LINKINGC8 H18 N2 O2LYS
MLZ
Query on MLZ
AL-PEPTIDE LINKINGC7 H16 N2 O2LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.20 Å
  • R-Value Free: 0.162 
  • R-Value Work: 0.143 
  • R-Value Observed: 0.144 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.796α = 90
b = 67.97β = 90
c = 85.038γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
SHELXLrefinement
SCALAdata scaling
XSCALEdata scaling
BUSTER-TNTrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-07-30
    Type: Initial release
  • Version 1.1: 2014-08-06
    Changes: Database references, Structure summary
  • Version 1.2: 2014-10-01
    Changes: Database references
  • Version 1.3: 2017-11-22
    Changes: Database references, Derived calculations, Other, Refinement description, Source and taxonomy