Optimized oxidoreductases for medium and large scale industrial biotransformations
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126
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[ 2013 ]
Churakova E, Arends IWCE, Hollmann F Increasing the Productivity of Peroxidase-Catalyzed Oxyfunctionalization: A Case Study on the Potential of Two-Liquid-Phase Systems
ChemCatChem, 5: 565-568
[ 2013 ]
Hahn F, Ullrich R, Hofrichter M, Liers C Experimental approach to follow the spatiotemporal wood degradation in fungal microcosms
Biotechnol. J., 8: 127-132
[ 2013 ]
Karich A, Kluge M, Ullrich R, Hofrichter M Benzene oxygenation and oxidation by the peroxygenase of Agrocybe aegerita
AMB Express, 3: 5-13
[ 2013 ]
Kluge M, Ullrich R, Scheibner K, Hofrichter M Formation of naphthalene hydrates in the enzymatic conversion of 1,2-dihydronaphthalene by two fungal peroxygenases and subsequent naphthalene formation
J. Mol. Cat. B, doi: 10.1016/j.molcatb.2013.08.017
[ 2013 ]
Liers C, Aranda E, Strittmatter E, Piontek K, Plattner D, Zorn H, Ullrich R, Hofrichter M Phenol oxidation by DyP-type peroxidases in comparison to fungal and plant peroxidases
J. Mol. Cat. B, doi: 10.1016/j.molcatb.2013.09.025
[ 2013 ]
Liers C, Pecyna MJ, Kellner H, Worrich A, Zorn H, Steffen KT, Hofrichter M, Ullrich R Substrate oxidation by dye-decolorizing peroxidases (DyPs) from wood- and litter-degrading agaricomycetes compared to other fungal and plant heme-peroxidases
Appl. Microbiol. Biotechnol., 97: 5839-5849
year2013
Enzymatic one-pot conversion of cyclohexane into cyclohexanone: Comparison of four fungal peroxygenases
Peter S, Karich A, Ullrich R, Gröbe G, Scheibner K, Hofrichter M
J. Mol. Cat. B, doi: 10.1016/j.molcatb.2013.09.016
Unspecific peroxygenases (UPO; EC 1.11.2.1) represent a group of secreted heme-thiolate proteins that are capable of catalyzing the mono-oxygenation of diverse organic compounds, using only H2O2 as a co-substrate. Here we show that the four peroxygenases AaeUPO, MroUPO, rCciUPO and rNOVO catalyze the stepwise hydroxylation of cyclohexane to cyclohexanol and cyclohexanone. The catalytic efficiencies (kcat/Km) for the initial hydroxylation were in the same order of magnitude for all four peroxygenases (∼104 M−1 s−1), whereas they differed in the second step. The conversion of cyclohexanol by AaeUPO and rCciUPO was 1–2 orders of magnitude less efficient (∼102 M−1 s−1) than by MroUPO and rNOVO (∼104 M−1 s−1). The highest conversion rate in terms of H2O2 utilization was accomplished by MroUPO under repeated addition of the peroxide (87% in relation to the total products formed). Using the latter UPO, we successfully established a micro-mixing reaction device (SIMM-V2) for the oxidation of cyclohexane. As cyclohexanone is a chemical of high relevance, for example, as starting material for polymer syntheses or as organic solvent, new enzymatic production pathways for this compound are of interest to complement existing chemical and biotechnological approaches. Stable and versatile peroxygenases, as those presented here, may form a promising biocatalytic platform for the development of such enzyme-based processes.
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[ industrialoxidoreductases ]. Optimized oxidoreductases for medium and large scale industrial biotransformations. This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under Grant Agreement nº: FP7-KBBE-2013-7-613549. © indox 2013. Developed by
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