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Botulinum Neurotoxin (BoNT) Resource Guide

Botulinum neurotoxins (BoNTs) are considered to be the deadliest naturally occurring toxins known to man. The potential use of BoNTs as bioweapons has accelerated the race to develop vaccines and antitoxins for this Category A bioterrorism agent as defined by the National Institute of Allergy and Infectious Diseases (NIAID).

Exposure to botulinum toxins results in several forms of botulism including foodborne, wound and infant botulism as well as intestinal colonization of adults resulting in neuroparalytic botulism. BoNT/A, BoNT/B, BoNT/E and BoNT/F cause human botulism and are chromosome associated. BoNT/C and BoNT/D cause animal botulism and are lysogenic phage (prophage) associated. Botulinum toxins have also proven beneficial as treatments for involuntary muscle disorders and migraines and are widely used in cosmetology and anti-aging medications.



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BoNT Serotypes A-G Nucleotide and Protein Sequences


Botulinum-relevant nucleotide and protein sequences can be retrieved from NCBI using taxonomy ID queries submitted against NCBI's Entrez nucleotide and protein databases. Results, where available, for these queries can be viewed by following the links provided below for the seven BoNT serotypes. In addition, links to NCBI's Taxonomy Browser are available for these serotypes to provide navigation to genomic trace records. For a curated list of Clostridium botulinum nucleotide and protein sequences available at NCBI by serotype, see the BoNT_toxins and BoNT_strains pages.


Serotype Name
Number of Nucleotide Sequences
Number of Protein Sequences
Genomic Trace Records
BoNT/A 3 2 Taxonomy ID: 36826
BoNT/B 5 10 Taxonomy ID: 36827
BoNT/C 2 1 Taxonomy ID: 36828
BoNT/D 3 2 Taxonomy ID: 36829
BoNT/E 1 Taxonomy ID: 36830
BoNT/F 1 Taxonomy ID: 36831
BoNT/G 2 1 Taxonomy ID: 29341

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