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Applied and Environmental Microbiology, April 2005, p. 2199-2202, Vol. 71, No. 4
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.4.2199-2202.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Opposite Enantioselectivities of Two Phenotypically and Genotypically Similar Strains of Pseudomonas frederiksbergensis in Bacterial Whole-Cell Sulfoxidation

Waldemar Adam,1,2 Frank Heckel,3 Chantu R. Saha-Möller,1 Marcus Taupp,3 Jean-Marie Meyer,4 and Peter Schreier3*

Institute of Organic Chemistry,1 Institute of Food Chemistry, University of Würzburg, Würzburg, Germany,3 Department of Chemistry, Facundo University of Puerto Rico, Rio Piedras, Puerto Rico,2 Laboratoire de Microbiologie et Génétique, Université Louis Pasteur, Strasbourg, France4

Received 19 August 2004/ Accepted 12 November 2004

Soil samples were screened to select microorganisms with the capability to oxidize organic sulfides into the corresponding sulfoxides with differential enantioselectivities. Several bacterial strains that preferentially produced the S-configured sulfoxide enantiomer were isolated. Surprisingly, one bacterial strain, genotypically and phenotypically characterized as Pseudomonas frederiksbergensis, selectively gave the R enantiomer. The finding that two apparently identical organisms displayed opposite enantioselectivities is novel for non-genetically modified organisms.

* Corresponding author. Mailing address: Institute of Food Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany. Phone: 49-(0)-931-8885480. Fax: 49-(0)-931-8885484. E-mail: schreier{at}pzlc.uni-wuerzburg.de.

Applied and Environmental Microbiology, April 2005, p. 2199-2202, Vol. 71, No. 4
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.4.2199-2202.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.





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