Journal
FEBS LETTERS
Volume 592, Issue 3, Pages 310-317Publisher
WILEY
DOI: 10.1002/1873-3468.12969
Keywords
botulinum neurotoxin; Clostridium; eBoNT/J; Enterococcus
Funding
- Biotechnology and Biological Sciences Research Council as part of the BBSRC Institute Strategic Programme on Gut Health and Food Safety [BB/J004529/1]
- BBSRC [BBS/E/F/00044401] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BBS/E/F/00044401] Funding Source: researchfish
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The deadly neurotoxins of Clostridium botulinum (BoNTs) comprise eight serotypes (A-G; X). The neurotoxin gene cluster encoding BoNT and its accessory proteins includes an operon containing an ntnh gene upstream of the boNT gene. Another operon contains either ha (haemagglutinin) or orfX genes (of unknown function). Here we describe a novel boNT gene cluster from Enterococcus sp. 3G1_DIV0629, with a typical ntnh gene and an uncommon orfX arrangement. The neurotoxin (designated putative eBoNT/J) contains a metallopeptidase zinc-binding site, a translocation domain and a target cell attachment domain. Structural properties of the latter suggest a novel targeting mechanism with consequent implications for application by the pharmaceutical industry. This is the first complete boNT gene cluster identified in a non-clostridial genome.
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