Abstract
The gene encoding a Baeyer-Villiger monooxygenase and identified in Pseudomonas putida KT2440 was cloned and functionally expressed in Escherichia coli. The highest yield of soluble protein could be achieved by co-expression of molecular chaperones. In order to determine the substrate specificity, biocatalyses were performed using crude cell extract, growing and resting cells. Examination of aromatic, cyclic and aliphatic ketones revealed a high specificity towards short-chain aliphatic ketones. Interestingly, some open-chain ketones were converted to the alkylacetates, while for others formation of the ester products with oxygen on the other side of the keto group could also be detected yielding the corresponding methyl or ethyl esters.
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Acknowledgements
We thank the Deutsche Bundesstiftung Umwelt (Osnabrück, Germany) for a stipend to Jessica Rehdorf and the Fonds der Chemischen Industrie (Frankfurt, Germany) and the Studienstiftung des Deutschen Volkes (Bonn, Germany) for stipends to Anett Kirschner.
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Rehdorf, J., Kirschner, A. & Bornscheuer, U.T. Cloning, expression and characterization of a Baeyer-Villiger monooxygenase from Pseudomonas putida KT2440. Biotechnol Lett 29, 1393–1398 (2007). https://doi.org/10.1007/s10529-007-9401-y
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DOI: https://doi.org/10.1007/s10529-007-9401-y