Biotransformation of androstenedione by Cladosporium sphaerospermum and Ulocladium chartarum

In this study, biotransformations of androstenedione by Cladosporium sphaerospermum MRC 70266 and Ulocladium chartarum MRC 72584 were performed. Incubation of androstenedione with Cladosporium sphaerospermum MRC 70266 yielded 17β-hydroxyandrost-4-en-3-one (2%), 5α-androstane-3,6,17-trione (3%), 6β-hydroxyandrost-4-en-3,17-dione (37%), 17β-hydroxyandrost-4-en-3,16-dione (5%), 6β,17β-dihydroxyandrost-4-en-3-one (6%), 15α-hydroxyiandrost-4-en-3,17-dione (4%) and 6β,17β-dihydroxyandrost-4-en-3,16-dione (3%). Incubation of androstenedione with Ulocladium chartarum MRC 72584 yielded 5α-androstane-3,6,17-trione (13%), 17β-hydroxy-5α-androstane-3,6-dione (3%), 14α-hydroxyandrost-4-en-3,17-dione (14%), 7β-hydroxyandrost-4-en-3,17-dione (18%) and 7α-hydroxyandrost-4-en-3,17-dione (10%). 6β,17β-dihydroxyandrost-4-en-3,16-dione was idendified as a new compound.