Repozytorium
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Kolekcje
Inne
Novel metabolites of dehydroepiandrosterone and progesterone obtained in didymosphearia igniaria KCH 6670 culture.
Autorzy
Rok wydania
2012
Czasopismo
Journal of Molecular Catalysis B-Enzymatic
Numer woluminu
82
Strony
24-31
DOI
10.1016/j.molcatb.2012.05.009
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Dehydroepiandrosterone (DHEA) (10) and its five derivatives: testosterone (1), androstenedione (2), 17α-methyltestosterone (6), progesterone (13) and pregnenolone (14) were subjected to microbial transformation by the filamentous fungus Didymosphaeria igniaria KCH 6670. The predominant metabolism of the incubated 5-ene steroids (10 and 14) occurred through 3β-hydroxy-steroid dehydrogenase/5,4-en isomerase pathways resulting in the generation of a 4-en-3-oxo system on ring-A. The transformations of C19 steroids (1, 2, and 10) included a hydroxylation at 7α position, ketone–alcohol interconversion at C-17 and reduction of the double bond at C-4 and 3-keto group to the 3β-alcohol with 5α-stereochemistry at A/B ring. D. igniaria also carried out 6(7)-dehydrogenation and 6,7β-epoxidation during transformation of DHEA. Under these conditions transformation of DHEA (10) gave four products: 7α-hydroxyandrost-4-en-3,17-dione (4), 17β-hydroxyandrost-4,6-dien-3-one (11), 17β-hydroxyandrost-6β-epoxy-4-en-3-one (12) and 3β,17β-dihydroxy-5α-androstane (5). The compounds 11 and 12 are identified as DHEA metabolites for the first time. The transformation of C21 steroids (13 and 14) led to the mixture of mono- (mainly 11α- and 15β-) and dihydroxy- (7α,15β-; 14α,15β-; 11α,15β-; 11α,14α-) products. 7α,15β-Dihydroxypregnan-4-en-3,20-dione (18) and 14α,15β-dihydroxypregnan-4-en-3,20-dione (19) were found to be new compounds. The main product of transformation of 17α-methyltestosterone (6) was 12β-hydroxy-17α-methyltestosterone (7). The results of these transformations demonstrate the dependence of hydroxylation position on the structure of steroid nucleus.
Słowa kluczowe
Biotransformation, DHEA, Didymosphaeria igniaria, Hydroxylation, Testosterone, Progesterone, Pregnenolone
Adres publiczny
https://doi.org/10.1016/j.molcatb.2012.05.009
Strona internetowa wydawcy
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