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Applied and Environmental Microbiology, February 2007, p. 1370-1374, Vol. 73, No. 4
0099-2240/07/$08.00+0     doi:10.1128/AEM.02379-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Benzoate Catabolite Repression of the Phthalate Degradation Pathway in Rhodococcus sp. Strain DK17{triangledown}

Ki Young Choi,1 Gerben J. Zylstra,2 and Eungbin Kim1*

Department of Biology, Yonsei University, Seoul 120-749, Korea,1 Biotechnology Center for Agriculture and the Environment, Cook College, Rutgers University, New Brunswick, New Jersey 08901-85202

Received 9 October 2006/ Accepted 4 December 2006

Rhodococcus sp. strain DK17 exhibits a catabolite repression-like response when provided simultaneously with benzoate and phthalate as carbon and energy sources. Benzoate in the medium is depleted to detection limits before the utilization of phthalate begins. The transcription of the genes encoding benzoate and phthalate dioxygenase paralleled the substrate utilization profile. Two mutant strains with defective benzoate dioxygenases were unable to utilize phthalate in the presence of benzoate, although they grew normally on phthalate in the absence of benzoate.

* Corresponding author. Mailing address: Department of Biology, Yonsei University, Seoul 120-749, Korea. Phone: 82-2-2123-2651. Fax: 82-2-312-5657. E-mail: eungbin{at}yonsei.ac.kr.

{triangledown} Published ahead of print on 8 December 2006.

Applied and Environmental Microbiology, February 2007, p. 1370-1374, Vol. 73, No. 4
0099-2240/07/$08.00+0     doi:10.1128/AEM.02379-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.





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