2001 年 65 巻 10 号 p. 2353-2357
A strain producing an inhibitor for pleiotropic drug resistant 5 (Pdr5) was isolated using our original screening system in yeast. The strain was classified and named as Kitasatospora sp. E-420. The purified inhibitor (molecular weight=1,193 by FAB-MS) inhibited a Pdr5-mediated efflux of cycloheximide and cerulenin. The intracellular accumulation of a fluorescent dye, rhodamine 123, by the inhibitor was also confirmed. Some physicochemical data suggested that the Pdr5-specific inhibitor was different from an immunosuppressant, FK506, reported as the only inhibitor of Pdr5 in vivo.
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