2BK1

The pore structure of pneumolysin, obtained by fitting the alpha carbon trace of perfringolysin O into a cryo-EM map


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 29 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of Pore Formation by the Bacterial Toxin Pneumolysin

Tilley, S.J.Orlova, E.V.Gilbert, R.J.C.Andrew, P.W.Saibil, H.R.

(2005) Cell 121: 247

  • DOI: 10.1016/j.cell.2005.02.033
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The bacterial toxin pneumolysin is released as a soluble monomer that kills target cells by assembling into large oligomeric rings and forming pores in cholesterol-containing membranes. Using cryo-EM and image processing, we have determined the struc ...

    The bacterial toxin pneumolysin is released as a soluble monomer that kills target cells by assembling into large oligomeric rings and forming pores in cholesterol-containing membranes. Using cryo-EM and image processing, we have determined the structures of membrane-surface bound (prepore) and inserted-pore oligomer forms, providing a direct observation of the conformational transition into the pore form of a cholesterol-dependent cytolysin. In the pore structure, the domains of the monomer separate and double over into an arch, forming a wall sealing the bilayer around the pore. This transformation is accomplished by substantial refolding of two of the four protein domains along with deformation of the membrane. Extension of protein density into the bilayer supports earlier predictions that the protein inserts beta hairpins into the membrane. With an oligomer size of up to 44 subunits in the pore, this assembly creates a transmembrane channel 260 A in diameter lined by 176 beta strands.


    Related Citations: 
    • Structure of a Cholesterol-Binding, Thiol-Activated Cytolysin and a Model of its Membrane Form
      Rossjohn, J.,Feil, S.C.,Mckinstry, W.J.,Tweten, R.K.,Parker, M.W.
      (1997) Cell 89: 685


    Organizational Affiliation

    School of Crystallography and Institute of Structural Molecular Biology, Birkbeck College, Malet Street, London WC1E 7HX, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PERFRINGOLYSIN O
A
448Clostridium perfringens (strain 13 / Type A)Mutation(s): 0 
Gene Names: pfo (pfoA, pfoR)
Find proteins for P0C2E9 (Clostridium perfringens (strain 13 / Type A))
Go to UniProtKB:  P0C2E9
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 29 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-05-04
    Type: Initial release
  • Version 1.1: 2013-01-16
    Type: Version format compliance
  • Version 1.2: 2017-04-19
    Type: Other