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ID: ALA1151904

Journal: Bioorg Med Chem Lett

Title: Computer-aided rational molecular design of argifin-derivatives with increased inhibitory activity against chitinase B from Serratia marcescens.

Authors: Gouda H, Sunazuka T, Iguchi K, Sugawara A, Hirose T, Noguchi Y, Saito Y, Yanai Y, Yamamoto T, Watanabe T, Shiomi K, Omura S, Hirono S.

Abstract: Argifin, a novel pentapeptide chitinase inhibitor isolated from Gliocladium fungal culture, is a promising candidate for the development of new fungicides, insecticides, and anti-asthma medications. In this study, we undertook rational molecular design of argifin-derivatives and tested them against chitinase B from Serratia marcescens (SmChiB). The work involved molecular dynamics simulation with explicit water molecules, the molecular docking calculation, and free-energy analysis using the molecular mechanics Poisson-Boltzmann surface area method. The custom-designed derivatives were synthesized via effective solid phase synthesis, developed recently in our laboratory, and their inhibitory activities were measured against SmChiB. Finally, we identified and obtained a derivative which exhibited 28-fold more inhibition than argifin itself, a compound in which the d-Ala(5) of argifin was replaced with d-Leu and the 4-benzylpiperdine was attached to l-Asp(4).

CiteXplore: 19395258

DOI: 10.1016/j.bmcl.2009.04.013