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Applied and Environmental Microbiology, January 2006, p. 59-65, Vol. 72, No. 1
0099-2240/06/$08.00+0     doi:10.1128/AEM.72.1.59-65.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Cytochrome P450 Alkane Hydroxylases of the CYP153 Family Are Common in Alkane-Degrading Eubacteria Lacking Integral Membrane Alkane Hydroxylases{dagger}

Jan B. van Beilen,* Enrico G. Funhoff, Alexander van Loon, Andrea Just, Leo Kaysser, Manuel Bouza, René Holtackers, Martina Röthlisberger, Zhi Li, and Bernard Witholt

Institute of Biotechnology, ETH Hönggerberg, CH-8093 Zürich, Switzerland

Received 1 June 2005/ Accepted 23 September 2005

Several strains that grow on medium-chain-length alkanes and catalyze interesting hydroxylation and epoxidation reactions do not possess integral membrane nonheme iron alkane hydroxylases. Using PCR, we show that most of these strains possess enzymes related to CYP153A1 and CYP153A6, cytochrome P450 enzymes that were characterized as alkane hydroxylases. A vector for the polycistronic coexpression of individual CYP153 genes with a ferredoxin gene and a ferredoxin reductase gene was constructed. Seven of the 11 CYP153 genes tested allowed Pseudomonas putida GPo12 recombinants to grow well on alkanes, providing evidence that the newly cloned P450s are indeed alkane hydroxylases.

* Corresponding author. Mailing address: Institute of Biotechnology, ETH Hönggerberg, CH-8093 Zürich, Switzerland. Phone: 41-1-6333444. Fax: 41-1-6331051. E-mail: vanbeilen{at}biotech.biol.ethz.ch

{dagger} Supplemental material for this article may be found at http://aem.asm.org/.

Applied and Environmental Microbiology, January 2006, p. 59-65, Vol. 72, No. 1
0099-2240/06/$08.00+0     doi:10.1128/AEM.72.1.59-65.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



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