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Applied and Environmental Microbiology, August 1999, p. 3730-3734, Vol. 65, No. 8
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

The Branched-Chain Dodecylbenzene Sulfonate Degradation Pathway of Pseudomonas aeruginosa W51D Involves a Novel Route for Degradation of the Surfactant Lateral Alkyl Chain

Jesús Campos-García,1 Abraham Esteve,2 Rafael Vázquez-Duhalt,3 Juán Luis Ramos,2 and Gloria Soberón-Chávez1,*

Departamento de Microbiología1 and Departamento de Bioingeniería,3 Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos 62251, México, and Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada 18008, Spain2

Received 4 March 1999/Accepted 11 May 1999

Pseudomonas aeruginosa W51D is able to grow by using branched-chain dodecylbenzene sulfonates (B-DBS) or the terpenic alcohol citronellol as a sole source of carbon. A mutant derived from this strain (W51M1) is unable to degrade citronellol but still grows on B-DBS, showing that the citronellol degradation route is not the main pathway involved in the degradation of the surfactant alkyl moiety. The structures of the main B-DBS isomers and of some intermediates were identified by gas chromatography-mass spectrometric analysis, and a possible catabolic route is proposed.

* Corresponding author. Mailing address: Departamento de Microbiología Molecular, Instituto de Biotecnología, UNAM, Apdo. Postal 510-3, Cuernavaca, Morelos 62251, México. Phone: (52) (73) 291634. Fax: (52) (73) 172388. E-mail: gloria{at}ibt.unam.mx.

Applied and Environmental Microbiology, August 1999, p. 3730-3734, Vol. 65, No. 8
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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Copyright © 1999 by the American Society for Microbiology. All rights reserved.