{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T05:04:54Z","timestamp":1789275894920,"version":"build-2803163510"},"reference-count":58,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T00:00:00Z","timestamp":1789084800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100012114","name":"Defense Research and Development Canada","doi-asserted-by":"crossref","award":["W7702-206207"],"award-info":[{"award-number":["W7702-206207"]}],"id":[{"id":"10.13039\/100012114","id-type":"DOI","asserted-by":"crossref"}]},{"award":["W7702-206207"],"award-info":[{"award-number":["W7702-206207"]}],"id":[{"id":"https:\/\/ror.org\/00hgy8d33","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Mol. Sci.","IJMS"],"abstract":"<jats:p>Botulinum neurotoxin (BoNT) is one of the most lethal biological substances to humans, which inhibits acetylcholine release by the presynaptic nerve in neuromuscular junctions. Of the existing BoNT serotypes, BoNT serotype A (BoNT\/A) is particularly potent, making it the primary focus in neurotoxin research. Its catalytic domain exhibits similar structural features and zinc-dependent activity as thermolysin, a key bacterial enzyme, which provides a foundation for designing antibacterial agents targeting related protease mechanisms. Repurposing of preapproved drugs or existing medications has recently proven an effective strategy to accelerate drug discovery. Accordingly, we employed drug-likeness screening, quantitative estimation of drug-likeness (QED), and molecular docking to screen about 9000 ligands from the FDA-preapproved drug library using the known crystal structures of the toxin\u2019s light chain, and we identified potential inhibitors with the highest binding affinity. We further refined our selection using molecular dynamics simulations to investigate the stability of the receptor\u2013ligand complexes. The binding mode analysis and binding free energies of the receptor\u2013ligand complexes provide crucial information about the mechanism of action of our top-ranked potential inhibitors. Notably, 16 ligands exhibit a binding affinity greater (in magnitude) than that of the hydroxamate inhibitors that are co-crystallized in the X-ray structure. Most of these ligands contain fluorine, carboxylic and phosphate moieties as key functional groups that enhance their interactions with key residues of the BoNT active site. Our results suggest that dinoprost and 15 other clinically investigated ligands may serve as candidate scaffolds for further evaluation as potential BoNT\/A LC inhibitors, pending experimental validation.<\/jats:p>","DOI":"10.3390\/ijms27188081","type":"journal-article","created":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T08:17:42Z","timestamp":1789114662000},"page":"8081","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Unveiling Novel Metalloprotease Inhibitors Targeting Botulinum Neurotoxin Through Structure-Based Virtual Screening of Drug Libraries and Molecular Dynamics Simulations"],"prefix":"10.3390","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-4244-661X","authenticated-orcid":false,"given":"Ridwan","family":"Sulaimon","sequence":"first","affiliation":[{"name":"Centre for Research in Molecular Modeling (CERMM), Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"software","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7223-3853","authenticated-orcid":false,"given":"Gurudeeban","family":"Selvaraj","sequence":"additional","affiliation":[{"name":"Centre for Research in Molecular Modeling (CERMM), Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"}]},{"given":"Nora W. 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