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  • Title: Identification of acridinyl hydrazides as potent aspartic protease inhibitors.
    Author: Azim MK, Ahmed W, Khan IA, Rao NA, Khan KM.
    Journal: Bioorg Med Chem Lett; 2008 May 01; 18(9):3011-5. PubMed ID: 18417344.
    Abstract:
    We have identified acridinyl derivatives as potent aspartic protease inhibitors by virtual screening of in-house library of synthetic compounds. Enzyme inhibition experiments showed that both compounds inhibit human cathepsin D and Plasmodium falciparum plasmepsin-II in nanomolar ranges. The IC(50) values against cathepsin D and plasmepsin-II of compound-Nar103 were found to be 9.0+/-2.0 and 4.0+/-1.0nM and of compound-Nar110 were 0.5+/-0.05 and 0.13+/-0.03nM, respectively. Ligand docking predicted the binding of acridinyl derivatives at the substrate-binding cleft, where hydrazide part of the inhibitors interact with the S1-S1' subsite residues including catalytic aspartates. The phenyl ring and acridinyl moiety of the inhibitors were predicted to interact with S2/S3 and S2'/S3' subsite residues.
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