Microbial Baeyer–Villiger oxidation of steroidal ketones using Beauveria bassiana: Presence of an 11α-hydroxyl group essential to generation of D-homo lactones
a rare reduction to 11α-hydroxy-5β-dihydrotestosterone. The experiments have demonstrated that the Baeyer–Villiger monooxygenase produced by the strain catalyzes solely oxidation of C-20 or C-17 ketones with 11α-hydroxyl group. 17-Oxo steroids, beside the 11α-hydroxylation and Baeyer–Villigeroxidation, also underwent reduction to 17β-alcohols; activity of 17β-hydroxysteroid dehydrogenase (17β-HSD)
Optimization of the 11α-hydroxylation of steroid DHEA by solvent-adapted <i>Beauveria bassiana</i>
作者:Richard Gonzalez、Felipe Nicolau、Tonya L. Peeples
DOI:10.1080/10242422.2017.1289183
日期:2017.3.4
This work enhances the selective hydroxylation capacity of strain ATCC 7159, resulting in a cost effective and eco-friendly process for the synthesis of valuable 11α-hydroxy steroids. Our work establishes the biochemical pathway of DHEA to hydroxylated intermediates with strain ATCC 7159, and distinguishes the optimum conditions for reactor arrangements, substrate concentration, reaction temperature,