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STUDIES N THIAMINE DISULFIDE VI. THE ACTION O THIAMINASE N O-BENZ YL THIAMINE DISULFIDE DERIVATIVES

STUDIES N THIAMINE DISULFIDE VI. THE ACTION O THIAMINASE N O-BENZ YL THIAMINE DISULFIDE DERIVATIVES ICHIRO CHIBATA, SH1GEKI YAMADA, IROSI ITO, SETSUKO FURUTSU AND ISAMU UTSUMI Osaka Research Laboratory, Tanabe Seiyaku Co., Ltd., Higashiyodogawa-ku, Osaka (Received June 22, 1962) Although the microbiological activities on thiamine disulfide (TDS) derivatives will be reported elsewhere, it would be important to study the action of thiaminase on TDS derivatives, such as O-benzoylthiamine disulfide (BIDS), having thiamine activity in living organisms. In this paper, the actions of thiaminase on BTDS, O-acetylthiamine disulfide (ATDS) and thiamine disulfide cetylsulfate (TDS-CS) using the crude thiaminase obtained from both Bacillus thiaminolyticus Matsukawa et Misawa (BMM) and Bacillus aneurinolyticus Kimura et Aoyoma (BKA) are described as compared to those on thiamine hydrochloride (B1-HC1) and TDS by the same enzymes (1, 2).