1CA1

ALPHA-TOXIN FROM CLOSTRIDIUM PERFRINGENS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the key toxin in gas gangrene.

Naylor, C.E.Eaton, J.T.Howells, A.Justin, N.Moss, D.S.Titball, R.W.Basak, A.K.

(1998) Nat.Struct.Mol.Biol. 5: 738-746

  • DOI: 10.1038/1447
  • Also Cited By: 2WY6, 2WXU, 2WXT, 1SB4, 1QMD, 1QM6, 1OLP

  • PubMed Abstract: 
  • Clostridium perfringens alpha-toxin is the key virulence determinant in gas gangrene and has also been implicated in the pathogenesis of sudden death syndrome in young animals. The toxin is a 370-residue, zinc metalloenzyme that has phospholipase C a ...

    Clostridium perfringens alpha-toxin is the key virulence determinant in gas gangrene and has also been implicated in the pathogenesis of sudden death syndrome in young animals. The toxin is a 370-residue, zinc metalloenzyme that has phospholipase C activity, and can bind to membranes in the presence of calcium. The crystal structure of the enzyme reveals a two-domain protein. The N-terminal domain shows an anticipated structural similarity to Bacillus cereus phosphatidylcholine-specific phospholipase C (PC-PLC). The C-terminal domain shows a strong structural analogy to eukaryotic calcium-binding C2 domains. We believe this is the first example of such a domain in prokaryotes. This type of domain has been found to act as a phospholipid and/or calcium-binding domain in intracellular second messenger proteins and, interestingly, these pathways are perturbed in cells treated with alpha-toxin. Finally, a possible mechanism for alpha-toxin attack on membrane-packed phospholipid is described, which rationalizes its toxicity when compared to other, non-haemolytic, but homologous phospholipases C.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Diffraction Studies of Alpha-Toxin from Two Different Strains (Nctc8237 and Cer89L43) of Clostridium Perfringens
      Basak, A.K.,Howells, A.,Eaton, J.T.,Moss, D.S.,Naylor, C.E.,Miller, J.,Titball, R.W.
      (1998) Acta Crystallogr.,Sect.D 54: 1425


    Organizational Affiliation

    Department of Crystallography, Birkbeck College, London, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA-TOXIN
A
370Clostridium perfringens (strain 13 / Type A)Mutation(s): 0 
Gene Names: plc (cpa)
EC: 3.1.4.3
Find proteins for P0C216 (Clostridium perfringens (strain 13 / Type A))
Go to UniProtKB:  P0C216
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CD
Query on CD

Download SDF File 
Download CCD File 
A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.208 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 61.300α = 90.00
b = 177.300β = 90.00
c = 79.100γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
DENZOdata reduction
X-PLORrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-05-04
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2011-11-16
    Type: Atomic model