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- W2077898246 abstract "Plasmepsin II (PMII), a malarial aspartic protease involved in the catabolism of hemoglobin in parasites of the genus Plasmodium, and renin, a human aspartic protease, share 35% sequence identity in their mature chains. Structures of 4-arylpiperidine inhibitors complexed to human renin were reported by Roche recently. The major conformational changes, compared to a structure of renin, with a peptidomimetic inhibitor were identified and subsequently modeled in a structure of PMII (Fig. 1). This distorted structure of PMII served as active-site model for a novel class of PMII inhibitors, according to a structure-based de novo design approach (Fig. 2). These newly designed inhibitors feature a rigid 7-azabicyclo[2.2.1]heptane scaffold, which, in its protonated form, is assumed to undergo ionic H-bonding with the two catalytic Asp residues at the active site of PMII. Two substituents depart from the scaffold for occupancy of either the S1/S3 or S2′-pocket and the hydrophobic flap pocket, newly created by the conformational changes in PMII. The inhibitors synthesized starting from N-Boc-protected 7-azabicyclo[2.2.1]hept-2-ene (6; Schemes 1–5) displayed up to single-digit micromolar activity (IC50 values) toward PMII and good selectivity towards renin. The clear structureactivity relationship (SAR; Table) provides strong validation of the proposed conformational changes in PMII and the occupancy of the resulting hydrophobic flap pocket by our new inhibitors." @default.
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- W2077898246 date "2003-06-01" @default.
- W2077898246 modified "2023-10-17" @default.
- W2077898246 title "Development of a New Class of Inhibitors for the Malarial Aspartic Protease Plasmepsin II Based on a Central 7-Azabicyclo[2.2.1]heptane Scaffold" @default.
- W2077898246 doi "https://doi.org/10.1002/hlca.200390176" @default.
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