产品内容
本酶催化的反应为(1) Cholest-5-Ene-3beta,25-Diol + NADPH + H+ + O2 = Cholest-5-Ene-3beta,7alpha,25-Triol + NADP+ + H2O;;(2) (25R)-Cholest-5-Ene-3beta,26-Diol + NADPH + H+ + O2 = (25R)-Cholest-5-Ene-3beta,7alpha,26-Triol + NADP+ + H2O,系统名称为Cholest-5-Ene-3beta,25/26-Diol,NADPH:oxygen Oxidoreductase (7alpha-Hydroxylating),一种血红素-硫醇盐蛋白(P-450)。与对其氧甾醇底物特异的EC 1.14.13.99(24-羟基胆固醇7α-单加氧酶)不同,该酶也能代谢氧甾醇24,25-环氧胆固醇、22-羟基胆固醇和24-羟基胆固醇,但程度较低 [2]。