3AM2

Clostridium perfringens enterotoxin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.217 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of Clostridium perfringens Enterotoxin Displays Features of {beta}-Pore-forming Toxins

Kitadokoro, K.Nishimura, K.Kamitani, S.Fukui-Miyazaki, A.Toshima, H.Abe, H.Kamata, Y.Sugita-Konishi, Y.Yamamoto, S.Karatani, H.Horiguchi, Y.

(2011) J Biol Chem 286: 19549-19555

  • DOI: https://doi.org/10.1074/jbc.M111.228478
  • Primary Citation of Related Structures:  
    3AM2

  • PubMed Abstract: 

    Clostridium perfringens enterotoxin (CPE) is a cause of food poisoning and is considered a pore-forming toxin, which damages target cells by disrupting the selective permeability of the plasma membrane. However, the pore-forming mechanism and the structural characteristics of the pores are not well documented. Here, we present the structure of CPE determined by x-ray crystallography at 2.0 Å. The overall structure of CPE displays an elongated shape, composed of three distinct domains, I, II, and III. Domain I corresponds to the region that was formerly referred to as C-CPE, which is responsible for binding to the specific receptor claudin. Domains II and III comprise a characteristic module, which resembles those of β-pore-forming toxins such as aerolysin, C. perfringens ε-toxin, and Laetiporus sulfureus hemolytic pore-forming lectin. The module is mainly made up of β-strands, two of which span its entire length. Domain II and domain III have three short β-strands each, by which they are distinguished. In addition, domain II has an α-helix lying on the β-strands. The sequence of amino acids composing the α-helix and preceding β-strand demonstrates an alternating pattern of hydrophobic residues that is characteristic of transmembrane domains forming β-barrel-made pores. These structural features imply that CPE is a β-pore-forming toxin. We also hypothesize that the transmembrane domain is inserted into the membrane upon the buckling of the two long β-strands spanning the module, a mechanism analogous to that of the cholesterol-dependent cytolysins.


  • Organizational Affiliation

    Graduate School of Science and Technology, Department of Biomolecular Engineering, Kyoto Institute of Technology, Sakyo-ku, Kyoto, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Heat-labile enterotoxin B chain328Clostridium perfringensMutation(s): 0 
Gene Names: cpe
UniProt
Find proteins for P01558 (Clostridium perfringens)
Explore P01558 
Go to UniProtKB:  P01558
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01558
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.217 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.03α = 90
b = 101.03β = 90
c = 101.03γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-04-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description