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논문 기본 정보

자료유형
학술저널
저자정보
Kang, Hee-Kyoung (College of Pharmacy, Seoul National University) Lee, Sang-Sup (College of Pharmacy, Seoul National University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제20권 제6호
발행연도
1997.1
수록면
519 - 524 (6page)

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초록· 키워드

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Steroid $9{\alpha}$-hydroxylase is an enzyme found in nocardioform microorganisms which can utilize steroids as a sole carbon source. After fractional centrifugation of the cell homogenates, the enzyme activity in Nocardia and Rhodococcus was found in cytoplasmic membrane fraction. On the contrary, Mycobacterium had its 9.alpha.-hydroxylation activity in cytosolic fraction. To characterize the enzyme in these microorganisms, several potential inhibitors of 9.alpha.-hydroxylase were tested and the cofactor requirement for the same enzyme was also examined. The inhibitory effect of ferrous ion chelators indicated involvement of iron containing proteins in the 9.alpha.-hydroxylase system. On the other hand, metyrapone, an inhibitor known to be specific for cytochrome P450 interfered with the enzyme in Mycobacterium, but didn't inhibit the enzyme activity in Nocardia and Rhodococcus. While the $9{\alpha}$-hydroxylase system in Nocardia and Rhodococcus required NADPH, NADH was required as an election donor in Mycobacterium.

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