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© Institut Pasteur
Cells infected for 24 hrs with C. Trachomatis. The cell nuclei are labelled in blue, the bacteria appear yellow, within the inclusion lumen. A bacterial protein secreted out the inclusion into the host cytoplasm id labelled in red.
Publication : Bioorganic & medicinal chemistry letters

Discovery of novel inhibitors of Trypanosoma cruzi trans-sialidase from in silico screening

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Bioorganic & medicinal chemistry letters - 24 Dec 2008

Neres J, Brewer ML, Ratier L, Botti H, Buschiazzo A, Edwards PN, Mortenson PN, Charlton MH, Alzari PM, Frasch AC, Bryce RA, Douglas KT

Link to Pubmed [PMID] – 19144516

Bioorg. Med. Chem. Lett. 2009 Feb;19(3):589-96

trans-Sialidase from Trypanosoma cruzi (TcTS) has emerged as a potential drug target for treatment of Chagas disease. Here, we report the results of virtual screening for the discovery of novel TcTS inhibitors, which targeted both the sialic acid and sialic acid acceptor sites of this enzyme. A library prepared from the Evotec database of commercially available compounds was screened using the molecular docking program GOLD, following the application of drug-likeness filters. Twenty-three compounds selected from the top-scoring ligands were purchased and assayed using a fluorimetric assay. Novel inhibitor scaffolds, with IC(50) values in the submillimolar range were discovered. The 3-benzothiazol-2-yl-4-phenyl-but-3-enoic acid scaffold was studied in more detail, and TcTS inhibition was confirmed by an alternative sialic acid transfer assay. Attempts to obtain crystal structures of these compounds with TcTS proved unsuccessful but provided evidence of ligand binding at the active site.

http://www.ncbi.nlm.nih.gov/pubmed/19144516