4P40

Chlamydia pneumoniae CopN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.162 
  • R-Value Work: 0.143 

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:  

  • 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 inhi ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CopN
A
425Chlamydia pneumoniaeMutation(s): 0 
Gene Names: lcrE
Find proteins for Q9Z8L4 (Chlamydia pneumoniae)
Go to UniProtKB:  Q9Z8L4
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
DMN
Query on DMN

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Download CCD File 
A
DIMETHYLAMINE
C2 H7 N
ROSDSFDQCJNGOL-UHFFFAOYSA-N
 Ligand Interaction
FOR
Query on FOR

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Download CCD File 
A
FORMYL GROUP
C H2 O
WSFSSNUMVMOOMR-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
MLZ
Query on MLZ
A
L-PEPTIDE LINKINGC7 H16 N2 O2LYS
MLY
Query on MLY
A
L-PEPTIDE LINKINGC8 H18 N2 O2LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.162 
  • R-Value Work: 0.143 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 66.796α = 90.00
b = 67.970β = 90.00
c = 85.038γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
XDSdata scaling
BUSTER-TNTrefinement
SCALAdata scaling
SHELXLrefinement
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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