Skip to main content

Some NLM-NCBI services and products are experiencing heavy traffic, which may affect performance and availability. We apologize for the inconvenience and appreciate your patience. For assistance, please contact our Help Desk at info@ncbi.nlm.nih.gov.

Applied Microbiology logoLink to Applied Microbiology
. 1975 Apr;29(4):444–447. doi: 10.1128/am.29.4.444-447.1975

Molecular Construction of Clostridium botulinum Progenitor Toxin

Iwao Ohishi 1, Genji Sakaguchi 1
PMCID: PMC187001  PMID: 235882

Abstract

Molecular dissociation of purified type F progenitor toxin with an S20,w of 10.3 and a molecular weight of 235,000 into two components, toxic and atoxic, was demonstrated by ultracentrifugation, gel filtration, and diethylaminoethyl-Sephadex chromatography at pH 7.5. The ultracentrifugal analysis indicated that type F progenitor toxin dissociates into components of the same molecular size of 5.9S. The toxic component contained a toxicity of 2.5 × 108 50% lethal doses per mg of N. Much higher stability of progenitor toxin than that of derivative toxin, particularly at pH below 5, suggests that only progenitor toxin can act as an oral toxin.

Full text

PDF
444

Images in this article

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Andrews P. The gel-filtration behaviour of proteins related to their molecular weights over a wide range. Biochem J. 1965 Sep;96(3):595–606. doi: 10.1042/bj0960595. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Dasgupta B. R., Boroff D. A., Rothstein E. Chromatographic fractionation of the crystalline toxin of Clostridium botulinum type A. Biochem Biophys Res Commun. 1966 Mar 22;22(6):750–756. doi: 10.1016/0006-291x(66)90212-9. [DOI] [PubMed] [Google Scholar]
  3. Kitamura M., Sakaguchi S., Sakaguchi G. Dissociation of Clostridium botulinum type-E-toxin. Biochem Biophys Res Commun. 1967 Dec 29;29(6):892–897. doi: 10.1016/0006-291x(67)90305-1. [DOI] [PubMed] [Google Scholar]
  4. Kitamura M., Sakaguchi S., Sakaguchi G. Significance of 12S toxin of Clostridium botulinum type E. J Bacteriol. 1969 Jun;98(3):1173–1178. doi: 10.1128/jb.98.3.1173-1178.1969. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Kozaki S., Sakaguchi S., Sakaguchi G. Purification and some properties of progenitor toxins of Clostridium botulinum type B. Infect Immun. 1974 Oct;10(4):750–756. doi: 10.1128/iai.10.4.750-756.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. LOWRY O. H., ROSEBROUGH N. J., FARR A. L., RANDALL R. J. Protein measurement with the Folin phenol reagent. J Biol Chem. 1951 Nov;193(1):265–275. [PubMed] [Google Scholar]
  7. Oishi I., Sakaguchi G. Purification of Clostridium botuliunum type F progenitor toxin. Appl Microbiol. 1974 Dec;28(6):923–928. doi: 10.1128/am.28.6.923-928.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Applied Microbiology are provided here courtesy of American Society for Microbiology (ASM)

RESOURCES