Chemistry of Natural Compounds

, Volume 49, Issue 4, pp 665–670 | Cite as

Fungal transformation of methyltestosterone by the soil ascomycete Acremonium strictum to some hydroxy derivatives of 17-methylsteroid

  • N. Nassiri-Koopaei
  • M. Mogharabi
  • M. Amini
  • A. Shafiee
  • M. A. Faramarzi

The ascomycete Acremonium strictum was used for the biotransformation of methyltestosterone (1), a pharmaceutical steroid substance, into some steroid derivatives (6β-hydroxy-17α-methyltestosterone (2), 6β,12β-dihydroxy-17α-methyltestosterone (3), 7β-hydroxy-17α-methyltestosterone (4), 6β,17β-dihydroxy-17α-methylandrosta-1,4-dien-3-one (5), and 3,17β-dihydroxy-17α-methylestra-1,3,5(10)-triene (6). The fermentation was carried out in Sabouraud-dextrose broth (SDB) supplemented with 1 mM of the substrate, and the temperature and aeration rate were adjusted to 30°C and 150 rpm, respectively. The biotransformation characteristics observed were hydoxylations at C-6β, C-7β, and C-12β, 1,2-dehydrogenation, and ring A aromatization. The best fermentation conditions, such as temperature, substrate concentration, pH, incubation period, and aeration, were found to be 25°C, 1 mM, pH 6.5, 6 days, and 150 rpm, respectively, for maximum biotransformation of 1.


Acremonium strictum biotransformation methyltestosterone steroid fungus ascomycete 



This work was supported by Grant No. 91-02-90-18474 awarded to M.A.F. by the Biotechnology Research Center, Tehran University of Medical Sciences, Tehran, Iran.


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • N. Nassiri-Koopaei
    • 1
  • M. Mogharabi
    • 1
  • M. Amini
    • 2
  • A. Shafiee
    • 2
  • M. A. Faramarzi
    • 1
    • 2
  1. 1.Department of Pharmaceutical BiotechnologyFaculty of Pharmacy and Biotechnology Research Center, Tehran University of Medical SciencesTehranIran
  2. 2.Pharmaceutical Sciences Research CenterTehran University of Medical SciencesTehranIran

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