Microbial transformation of androst-4-ene-3,17-dione by three fungal species Absidia griseolla var. igachii, Circinella muscae and Trichoderma virens

Publication date: Available online 15 January 2016 Source:Journal of Molecular Catalysis B: Enzymatic Author(s): Marjan Heidary, Zohreh Habibi Microbial transformation of androst-4-ene-3,17-dione (AD;I) by three fungal species including Absidia griseolla var. igachii, Circinella muscae and Trichoderma virens was investigated for the first time. While A. griseolla and C. muscae carried out hydroxylation reactions, the third fungi performed reduction of the 17-carbonyl group in a chemoselective manner. Incubation of AD by A. griseolla yielded four metabolites 6β- (II), 7α- (III), 7β- (VI) and 14α-hydroxy-AD (V), among which 6β-hydroxy-AD (II) was identified as the major product. Furthermore, the metabolites produced during AD biotransformation by C. muscae were 6β- (II), 7β- (III) and 14α-hydroxy-AD (V). On the other hand, T. virens remarkably reduced AD into testosterone (VI) as the only product with 60% yield. These metabolites were purified by TLC and identified by 1H NMR, 13C NMR and other spectroscopic data. Graphical abstract

Source: Journal of Molecular Catalysis B: Enzymatic - January 16, 2016 Category: Biochemistry Source Type: research