-Myristoyltransferase (NMT) represents an attractive drug target in parasitic infections such as malaria due to its genetic essentiality and amenability to inhibition by drug-like small molecules. Scaffold simplification from previously reported inhibitors containing bicyclic cores identified phenyl derivative , providing a versatile platform to study the effects of substitution on the scaffold, which yielded pyridyl . This molecule exhibited improved enzyme and cellular potency, and reduced lipophilicity compared to inhibitor . Further structure-based inhibitor design led to the discovery of , the most potent inhibitor in this series, which showed single-digit nM enzyme affinity and sub-μM anti-plasmodial activity.
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http://dx.doi.org/10.1039/c5md00242g | DOI Listing |
Medchemcomm
October 2015
Department of Chemistry , Imperial College London, London , SW7 2AZ , UK . Email: ; Tel: +44 (0)2075 943 752.
J Med Chem
April 2003
Chemistry Department, Drug Discovery Division, and Biochemistry Department, Thrombosis Research Institute, Emanuelle Kaye Building, Manresa Road, London, SW3 6LR. UK.
Using the crystal structure of an inhibitor complexed with the serine protease thrombin (PDB code ) and the functional group definitions contained within the Catalyst software, a representation of the enzyme's active site was produced (structure-based pharmacophore model). A training set of 16 homologous non-peptide inhibitors whose conformations had been generated in continuum solvent (MacroModel) and clustered into conformational families (XCluster) was regressed against this pharmacophore so as to obtain a 3D-QSAR model. To test the robustness of the resulting QSAR model, the synthesis of a series of non-peptide thrombin inhibitors based on arylsuphonyl derivatives of an aminophenol ring linked to a pyridyl-based S1 binding group was undertaken.
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