TY - GEN A1 - Kiebist, Jan A1 - Schmidtke, Kai-Uwe A1 - Zimmermann, Jörg A1 - Kellner, Harald A1 - Jehmlich, Nico A1 - Ullrich, René A1 - Zänder, Daniel A1 - Hofrichter, Martin A1 - Scheibner, Katrin T1 - A peroxygenase from Chaetomium globosum catalyzes the selective oxygenation of testosterone T2 - ChemBioChem N2 - Unspecific peroxygenases (UPO, EC 1.11.2.1) secreted by fungi open an efficient way to selectively oxyfunctionalize diverse organic substrates including less activated hydrocarbons by transferring peroxide-borne oxygen. Herein, we investigated a cell-free approach to incorporate epoxy and hydroxyl functionalities directly into the bulky molecule of testosterone by a novel unspecific peroxygenase that was produced by the ascomycetous fungus Chaetomium globosum in a complex medium rich in carbon and nitrogen. Purification by fast protein liquid chromatography revealed two enzyme fractions with the same molecular mass of 36 kDa and specific activities of 4.4 to 12 U mg-1. Whereas well-known UPOs of Agrocybe aegerita (AaeUPO) and Marasmius rotula (MroUPO) failed to convert testosterone in a comparative study, the UPO of C. globosum (CglUPO) accepted testosterone as substrate and converted it with up to 7,000 total turnovers (TTN) into two oxygenated products: the 4,5-epoxide of testosterone in β-configuration and 16α-hydroxytestosterone. The reaction was performed at 100-mg scale resulting in the formation of about 90 % of the epoxide and 10 % of the hydroxylation product, which both could be isolated with purities above 96 %. Thus, CglUPO may be a promising biocatalyst for the oxyfunctionalization of bulky steroids and provide a useful tool for the synthesis of pharmaceutically relevant steroidal molecules. KW - peroxidase KW - hydroxylation Y1 - 2017 UR - http://onlinelibrary.wiley.com/doi/10.1002/cbic.201600677/abstract U6 - https://doi.org/10.1002/cbic.201600677 SN - 1439-7633 VL - 18 IS - 6 SP - 563 EP - 569 ER - TY - GEN A1 - Kellner, Harald A1 - Friedrich, Stephanie A1 - Schmidtke, Kai-Uwe A1 - Ullrich, René A1 - Kiebist, Jan A1 - Zänder, Daniel A1 - Hofrichter, Martin A1 - Scheibner, Katrin T1 - Draft genome sequence of Truncatella angustata (Anamorph) S358 T2 - Microbiology resource announcement N2 - The ascomycete Truncatella angustata has a worldwide distribution. Commonly, it is associated with plants as an endophyte, pathogen, or saprotroph. The genome assembly comprises 44.9 Mbp, a G+C content of 49.2%, and 12,353 predicted genes, among them 12 unspecific peroxygenases (EC 1.11.2.1). KW - unspecific peroxygenase KW - GENOME SEQUENCES KW - Truncatella angustata Y1 - 2022 UR - https://journals.asm.org/doi/epub/10.1128/mra.00052-22 U6 - https://doi.org/10.1128/mra.00052-22 SN - 2169-8287 SN - 2576-098X VL - 11 IS - 7 ER -