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In enzymology, a progesterone 5alpha-reductase () is an enzyme that catalyzes the chemical reaction :5alpha-pregnan-3,20-dione + NADP+ progesterone + NADPH + H+ Thus, the two substrates of this enzyme are 5alpha-pregnan-3,20-dione and NADP+, whereas its 3 products are progesterone, NADPH, and H+. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-CH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is 5alpha-pregnan-3,20-dione:NADP+ 5-oxidoreductase. Other names in common use include steroid 5-alpha-reductase, and Delta4-steroid 5alpha-reductase (progesterone). This enzyme participates in c21-steroid hormone metabolism. ==References== * * 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Progesterone 5alpha-reductase」の詳細全文を読む スポンサード リンク
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