3G4N

Crystal structure of the activated aerolysin mutant H132D


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Dual chaperone role of the C-terminal propeptide in folding and oligomerization of the pore-forming toxin aerolysin.

Iacovache, I.Degiacomi, M.T.Pernot, L.Ho, S.Schiltz, M.Dal Peraro, M.van der Goot, F.G.

(2011) Plos Pathog. 7: e1002135-e1002135

  • DOI: 10.1371/journal.ppat.1002135
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Throughout evolution, one of the most ancient forms of aggression between cells or organisms has been the production of proteins or peptides affecting the permeability of the target cell membrane. This class of virulence factors includes the largest ...

    Throughout evolution, one of the most ancient forms of aggression between cells or organisms has been the production of proteins or peptides affecting the permeability of the target cell membrane. This class of virulence factors includes the largest family of bacterial toxins, the pore-forming toxins (PFTs). PFTs are bistable structures that can exist in a soluble and a transmembrane state. It is unclear what drives biosynthetic folding towards the soluble state, a requirement that is essential to protect the PFT-producing cell. Here we have investigated the folding of aerolysin, produced by the human pathogen Aeromonas hydrophila, and more specifically the role of the C-terminal propeptide (CTP). By combining the predictive power of computational techniques with experimental validation using both structural and functional approaches, we show that the CTP prevents aggregation during biosynthetic folding. We identified specific residues that mediate binding of the CTP to the toxin. We show that the CTP is crucial for the control of the aerolysin activity, since it protects individual subunits from aggregation within the bacterium and later controls assembly of the quaternary pore-forming complex at the surface of the target host cell. The CTP is the first example of a C-terminal chain-linked chaperone with dual function.


    Related Citations: 
    • Structure of the Aeromonas toxin proaerolysin in its water-soluble and membrane-channel states.
      Parker, M.W.,Buckley, J.T.,Postma, J.P.,Tucker, A.D.,Leonard, K.,Pattus, F.,Tsernoglou, D.
      (1994) Nature 367: 292


    Organizational Affiliation

    Global Health Institute, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aerolysin
A, B
470Aeromonas hydrophilaMutation(s): 1 
Gene Names: aerA
Find proteins for P09167 (Aeromonas hydrophila)
Go to UniProtKB:  P09167
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.214 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 95.723α = 90.00
b = 70.211β = 109.11
c = 165.446γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-08-03
    Type: Database references