Purification and characterization of Clostridium perfringens delta-toxin.
Infect Immun
; 31(2): 536-46, 1981 Feb.
Article
em En
| MEDLINE
| ID: mdl-6260669
ABSTRACT
Delta-toxin, an extracellular hemolysin released by Clostridium perfringens type C, was purified from culture supernatant fluid by sequential ammonium sulfate precipitation, thiol-Sepharose gel chromatography, isoelectric focusing, and Sephadex G-75 gel filtration. The purified preparation had a specific activity of 320,000 hemolytic units per mg of protein and was homogeneous, as determined by immunochemical and electrophoretic tests. This toxin was characterized as a single polypeptide chain composed of 391 amino acid residues, 30% of which were hydrophobic. The molecular weight was found to be 42,000, and the isoelectric point was pH 9.1. Delta-toxin appeared to be amphiphilic by charge shift electrophoresis in a three-detergent system. It was immunogenic in rabbits and lethal to mice at a dose of 0.12 micrograms. The lytic activity of delta-toxin was restricted to erythrocytes of even-toed ungulates (sheep, goats, and pigs). This activity was inhibited by GM2 ganglioside but not by other gangliosides, cholesterol, lecithin, or sphingomyelin.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Toxinas Bacterianas
/
Clostridium perfringens
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Proteínas Hemolisinas
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Infect Immun
Ano de publicação:
1981
Tipo de documento:
Article