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- W1982654564 abstract "Hydroxylation activity of the mold fungi belonging to the orders Dothideales, Hypocreales, and Mucorales towards Δ5-3β-hydroxysteroids was studied. The fungi Bipolaris sorokiniana, Fusarium sp., and Rhizopus nigricans were able to introduce hydroxy group at position 7α; however, this ability was detected only at a low substrate load and with a low yield. A 7α-hydroxylase activity of the Curvularia lunata VKPM F-981 culture was shown for the first time. It was demonstrated that the studied strain was capable of stereo- and regioselective transformations of androstane 5-olefins at a load not less than 2 g/1. Conversion of pregnane steroids by this culture yielded both 7α- and 11β-hydroxy derivatives. The introduction of 7α-hydroxy group by this strain occurred concurrently with enzymatic hydrolysis of ester groups, which proceeded under mild conditions to give the corresponding alcohols in the cases of both 3-acetate of Δ5-androstenes and mono- and triacetates of Δ5-pregnenes." @default.
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- W1982654564 date "2010-01-01" @default.
- W1982654564 modified "2023-10-07" @default.
- W1982654564 title "7α-Hydroxylation of steroid 5-olefins by mold fungi" @default.
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- W1982654564 doi "https://doi.org/10.1134/s0003683810010126" @default.
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