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Highly efficient synthesis of boldenone from androst-4-ene-3,17-dione by Arthrobacter simplex and Pichia pastoris ordered biotransformation.
Bioprocess and Biosystems Engineering 2019 March 9
Boldenone (BD) is an important steroid hormone drug which is the derivative of testosterone. In this study, an ordered biotransformation method was proposed employing Arthrobacter simplex and recombinant Pichia pastoris with 17β-hydroxysteroid dehydrogenase from Saccharomyces cerevisiae to produce BD from androst-4-ene-3,17-dione (AD) efficiently. To lower the oxidation towards BD in A. simplex, the transformation was conducted sequentially by C1,2 dehydrogenation in A. simplex and 17β-carbonyl reduction in recombinant P. pastoris GS115. Moreover, the reaction system was inactivated before recombinant P. pastoris GS115 was added to further inhibit the oxidation of BD by A. simplex, and the productivity of BD was improved 10.6% compared with the control. Furthermore, by optimizing the conditions of transformation from AD to BD, 4.2 g/L BD was generated with 83% productivity from 5.0 g/L AD, which was the highest productivity reported by biological method. This study offers a promising method to produce BD by ordered biotransformation system, which can also be used to manufacture other steroidal compounds that are difficult to acquire directly.
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