5LY6

CryoEM structure of the membrane pore complex of Pneumolysin at 4.5A


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

CryoEM structures of membrane pore and prepore complex reveal cytolytic mechanism of Pneumolysin.

van Pee, K.Neuhaus, A.D'Imprima, E.Mills, D.J.Kuhlbrandt, W.Yildiz, O.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.23644
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Many pathogenic bacteria produce pore-forming toxins to attack and kill human cells. We have determined the 4.5 Å structure of the ~2.2 MDa pore complex of pneumolysin, the main virulence factor of Streptococcus pneumoniae, by cryoEM. The pneumolysin ...

    Many pathogenic bacteria produce pore-forming toxins to attack and kill human cells. We have determined the 4.5 Å structure of the ~2.2 MDa pore complex of pneumolysin, the main virulence factor of Streptococcus pneumoniae, by cryoEM. The pneumolysin pore is a 400 Å ring of 42 membrane-inserted monomers. Domain 3 of the soluble toxin refolds into two ~85 Å β-hairpins that traverse the lipid bilayer and assemble into a 168-strand β-barrel. The pore complex is stabilized by salt bridges between β-hairpins of adjacent subunits and an internal α-barrel. The apolar outer barrel surface with large sidechains is immersed in the lipid bilayer, while the inner barrel surface is highly charged. Comparison of the cryoEM pore complex to the prepore structure obtained by electron cryo-tomography and the x-ray structure of the soluble form reveals the detailed mechanisms by which the toxin monomers insert into the lipid bilayer to perforate the target membrane.


    Organizational Affiliation

    Department of Structural Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pneumolysin
B
471Streptococcus pneumoniae serotype 2 (strain D39 / NCTC 7466)Mutation(s): 0 
Gene Names: ply
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Adventitious Membrane Proteins: Beta-sheet Pore-forming Toxins/Attack Complexes
Protein: 
Pneumolysin (PLY) complex
Find proteins for Q04IN8 (Streptococcus pneumoniae serotype 2 (strain D39 / NCTC 7466))
Go to UniProtKB:  Q04IN8
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Max Planck SocietyGermanyBiophysics/Structural Biology

Revision History 

  • Version 1.0: 2017-04-05
    Type: Initial release
  • Version 1.1: 2017-08-02
    Type: Data collection