Related Experiment Video
Updated: Mar 9, 2026

A High-throughput-compatible FRET-based Platform for Identification and Characterization of Botulinum Neurotoxin Light Chain Modulators
Published on: December 27, 2013
A matrix-focused structure-activity and binding site flexibility study of quinolinol inhibitors of botulinum
William A Harrell1, Rebecca C Vieira1, Susan M Ensel2
1Division of Molecular and Translational Sciences, U.S. Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, United States.
Abstract:
Our initial discovery of 8-hydroxyquinoline inhibitors of BoNT/A and separation/testing of enantiomers of one of the more active leads indicated considerable flexibility in the binding site. We designed a limited study to investigate this flexibility and probe structure-activity relationships; utilizing the Betti reaction, a 36 compound matrix of quinolinol BoNT/A LC inhibitors was developed using three 8-hydroxyquinolines, three heteroaromatic amines, and four substituted benzaldehydes. This study has revealed some of the most effective quinolinol-based BoNT/A inhibitors to date, with 7 compounds displaying IC50 values ⩽1μM and 11 effective at ⩽2μM in an ex vivo assay.
Related Concept Videos
Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin
The binding of dantrolene to the RYR1...
Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
Direct-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
The direct-acting...
Ligand Binding and Linkage
Local Anesthetics: Chemistry and Structure-Activity Relationship
Cholinergic Antagonists: Chemistry and Structure-Activity Relationship

