Biotransformations of epiandrosterone (1), dehydroepiandrosterone (2), testosterone (3), progesterone (4) and pregnenolone (5) byAspergillus tamariiMRC 72400 for 5 days have been reported and the results of these incubations have been compared with previously published data obtained withAspergillus tamariiQM 1223.A. tamariiMRC 72400 showed higher Bayer–Villiger monooxygenase activities thanA. tamariiQM 1223 did. Apart from pregnenolone (5),A. tamariiMRC 72400 metabolized these steroids in different ways. Incubation of epiandrosterone (1) afforded 3β,11β-dihydroxy-5α-androstan-17-one (6) (3%) and 3β-hydroxy-17a-oxa-D-homo-5α-androstan-17-one (7) (9.5%). Incubation of dehydroepiandrosterone (2) afforded 3β-hydroxy-17a-oxa-D-homoandrost-5-en-17-one (8) (28%), testolactone (9) (6%), 3β,7β-dihydroxyandrost-5-en-17-one (10) (13%) and 3β,7α-dihydroxy- androst-5-en-17-one (11) (24%). Incubation of testosterone (3) afforded testolactone (9) (58%). Incubation of progesterone (4) also afforded testolactone (9), however in higher yield (86%). Incubation of pregnenolone (5) afforded 3β-hydroxy-17a-oxa-D-homoandrost-5-en-17-one (8) (25%) and testolactone (9) (27%).
对于Epiandrosterone(1),去氢表雄酮(2),睾酮(3),孕酮(4)和孕酮醇(5)在5天内由Aspergillus tamarii MRC 72400进行的生物转化已经报道,并将这些培养结果与之前使用Aspergillus tamarii QM 1223获得的数据进行了比较。A. tamarii MRC 72400显示出比A. tamarii QM 1223更高的Bayer-Villiger单氧酶活性。除了孕酮醇(5)外,A. tamarii MRC 72400以不同方式代谢这些类固醇。Epiandrosterone(1)的培养产生了3β,11β-二羟基-5α-雄烷-17-酮(6)(3%)和3β-羟基-17a-氧杂-D-同型-5α-雄烷-17-酮(7)(9.5%)。去氢表雄酮(2)的培养产生了3β-羟基-17a-氧杂-D-同型雄烷-5-烯-17-酮(8)(28%),睾酮内酯(9)(6%),3β,7β-二羟基雄烷-5-烯-17-酮(10)(13%)和3β,7α-二羟基-雄烷-5-烯-17-酮(11)(24%)。睾酮(3)的培养产生了睾酮内酯(9)(58%)。孕酮(4)的培养也产生了睾酮内酯(9),但产率更高(86%)。孕酮醇(5)的培养产生了3β-羟基-17a-氧杂-D-同型雄烷-5-烯-17-酮(8)(25%)和睾酮内酯(9)(27%)。