[1S-(1α,4α,5β,6α)]-1,5,6-트리데옥시-4-o-β-D-글루코피라노실-5-(하이드록시메틸)-1-[[4,5,6-트리하이드록시-3-(하이드록시메틸)-2-사이클로헥센-1-일]아미노]-D-키로이노시톨; 발리다마이신 A

개요Validamycin A is produced by the fermentation of Streptomyces hygroscopicus var. limoneus nov. var (30). Structure revised (31). Colorless, odorless, hygroscopic powder. V.p. Negligible at room temperature. Solubility: Readily soluble in water, soluble in methanol, dimethylformamide and dimethyl sulfoxide. Slightly soluble in ethanol and acetone. Sparingly soluble in diethyl ether and ethyl acetate. pKa 6.0 Stability [α]24D + 110 (water).

용도Validamycin A is the major analogue of a family of cyclitol disaccharides isolated from Streptomyces hygroscopicus var. limoneus by researchers at Takeda in 1970. Although commonly regarded as an aminoglycoside, validamycin shares little in common with conventional aminoglycosides such as streptomycin and gentamicin. Validamycin A is a potent antifungal agent and is used to control fungi in crop production. Validamycin A acts as a potent inhibitor of trehalase, an important enzyme in carbohydrate storage and ultilisation in fungi.