5GAQ

Cryo-EM structure of the Lysenin Pore


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.1 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.6 of the entry. See complete history

Literature

Cryo-EM structure of lysenin pore elucidates membrane insertion by an aerolysin family protein

Bokori-Brown, M.Martin, T.G.Naylor, C.E.Basak, A.K.Titball, R.W.Savva, C.G.

(2016) Nat Commun 7: 11293-11293

  • DOI: 10.1038/ncomms11293

  • PubMed Abstract: 
  • Lysenin from the coelomic fluid of the earthworm Eisenia fetida belongs to the aerolysin family of small β-pore-forming toxins (β-PFTs), some members of which are pathogenic to humans and animals. Despite efforts, a high-resolution structure of a cha ...

    Lysenin from the coelomic fluid of the earthworm Eisenia fetida belongs to the aerolysin family of small β-pore-forming toxins (β-PFTs), some members of which are pathogenic to humans and animals. Despite efforts, a high-resolution structure of a channel for this family of proteins has been elusive and therefore the mechanism of activation and membrane insertion remains unclear. Here we determine the pore structure of lysenin by single particle cryo-EM, to 3.1 Å resolution. The nonameric assembly reveals a long β-barrel channel spanning the length of the complex that, unexpectedly, includes the two pre-insertion strands flanking the hypothetical membrane-insertion loop. Examination of other members of the aerolysin family reveals high structural preservation in this region, indicating that the membrane-insertion pathway in this family is conserved. For some toxins, proteolytic activation and pro-peptide removal will facilitate unfolding of the pre-insertion strands, allowing them to form the β-barrel of the channel.


    Organizational Affiliation

    Biosciences, College of Life and Environmental Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lysenin
A, B, C, D, E, F, G, H, I
310Eisenia fetidaMutation(s): 0 
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Adventitious Membrane Proteins: Beta-sheet Pore-forming Toxins/Attack Complexes
Protein: 
Lysenin Pore complex
Find proteins for O18423 (Eisenia fetida)
Go to UniProtKB:  O18423
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.1 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMC-A021-53019
Wellcome TrustUnited KingdomWT089618MA

Revision History 

  • Version 1.0: 2016-04-06
    Type: Initial release
  • Version 1.1: 2016-05-18
    Type: Database references
  • Version 1.2: 2016-05-25
    Type: Database references
  • Version 1.3: 2017-06-28
    Type: Database references
  • Version 1.4: 2017-07-05
    Type: Derived calculations
  • Version 1.5: 2017-07-19
    Type: Derived calculations
  • Version 1.6: 2017-08-30
    Type: Author supporting evidence, Data collection