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Updated: Mar 18, 2026

A High Content Imaging Assay for Identification of Botulinum Neurotoxin Inhibitors
Published on: November 14, 2014
Small molecule non-peptide inhibitors of botulinum neurotoxin serotype E: Structure-activity relationship and a
Gyanendra Kumar1, Rakhi Agarwal1, Subramanyam Swaminathan1
1Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA.
Abstract:
Botulinum neurotoxins (BoNTs) are the most poisonous biological substance known to humans. They cause flaccid paralysis by blocking the release of acetylcholine at the neuromuscular junction. Here, we report a number of small molecule non-peptide inhibitors of BoNT serotype E. The structure-activity relationship and a pharmacophore model are presented. Although non-peptidic in nature, these inhibitors mimic key features of the uncleavable substrate peptide Arg-Ile-Met-Glu (RIME) of the SNAP-25 protein. Among the compounds tested, most of the potent inhibitors bear a zinc-chelating moiety connected to a hydrophobic and aromatic moiety through a carboxyl or amide linker. All of them show low micromolar IC50 values.
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