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  • Title: Plasmid localization of a type E botulinal neurotoxin gene homologue in toxigenic Clostridium butyricum strains, and absence of this gene in non-toxigenic C. butyricum strains.
    Author: Hauser D, Gibert M, Boquet P, Popoff MR.
    Journal: FEMS Microbiol Lett; 1992 Dec 01; 78(2-3):251-5. PubMed ID: 1490606.
    Abstract:
    It has been shown recently that two Clostridium butyricum strains (ATCC 43181 and ATCC 43755) contain a botulinal neurotoxin type E (BoNT/E) gene closely related to that of C. botulinum type E. In this study, we show that this gene is located on a large plasmid in the two toxigenic C. butyricum strains and is absent in 18 non-toxigenic C. butyricum and C. beijerinckii strains. Interestingly, the 230 bp upstream and the 1260 bp downstream of the neurotoxin coding sequence are not present in either the non-toxigenic C. butyricum or C. beijerinckii strains. Our data suggest a BoNT/E gene transfer from C. botulinum E to originally non-toxigenic C. butyricum strains.
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