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. 1987 Dec;53(12):2827–2830. doi: 10.1128/aem.53.12.2827-2830.1987

Simplified purification method for Clostridium botulinum type E toxin.

J A Giménez 1, H Sugiyama 1
PMCID: PMC204206  PMID: 3435146

Abstract

Clostridium botulinum type E toxin was purified in three chromatography steps. Toxin extracted from cells was concentrated by precipitation and dissolving in a small volume of citrate buffer. When the extract was chromatographed on DEAE-Sephadex without RNase or protamine treatment, the first protein peak had most of the toxin but little nucleic acid. When the toxic pool was applied to a carboxymethyl Sepharose column, toxin was recovered in the first protein peak in its bimolecular complex form. The final chromatography step at 4 degrees C on a DEAE-Sephacel column at a slightly alkaline pH purified the toxin (Mr, 145,000) by separating the nontoxic protein from the complex. At least 1.5 mg of pure toxin was obtained from each liter of culture, and the toxicity was 6 X 10(7) 50% lethal doses per mg of protein. These values are significantly higher than those previously reported.

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Selected References

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

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