Rhodococcus rhodochrous DSM 43269 3-ketosteroid 9alpha-hydroxylase, a two-component iron-sulfur-containing monooxygenase with subtle steroid substrate specificity.

@article{Petrusma2009RhodococcusRD,
  title={Rhodococcus rhodochrous DSM 43269 3-ketosteroid 9alpha-hydroxylase, a two-component iron-sulfur-containing monooxygenase with subtle steroid substrate specificity.},
  author={Mirjan Petrusma and Lubbert Dijkhuizen and Robert van der Geize},
  journal={Applied and environmental microbiology},
  year={2009},
  volume={75 16},
  pages={5300-7}
}
This paper reports the biochemical characterization of a purified and reconstituted two-component 3-ketosteroid 9alpha-hydroxylase (KSH). KSH of Rhodococcus rhodochrous DSM 43269, consisting of a ferredoxin reductase (KshB) and a terminal oxygenase (KshA), was heterologously expressed in Escherichia coli. E. coli cell cultures, expressing both KshA and KshB, converted 4-androstene-3,17-dione (AD) into 9alpha-hydroxy-4-AD (9OHAD) with a >60% molar yield over 48 h of incubation. Coexpression and… CONTINUE READING

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