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Catechol ring-cleavage in Pseudomonas cepacia: the simultaneous induction of ortho and meta pathways

  • Applied Microbial and Cell Physiology
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Abstract

This work demonstrates the ring-cleavage pathways of catechol on Pseudomonas cepacia ATCC 29351, formed upon its growth on salicylate and benzoate, each as a sole carbon source. When grown on salicylate, P. cepacia induces only the catechol ortho pathway by its induction of catechol 1,2-dioxygenase. However, interestingly, benzoate-grown cells induce the ortho and meta pathways for the biodegradation of catechol, by inducing simultaneously catechol 1,2-dioxygenase and 2,3-dioxygenase, respectively, in the ratio of 7:1. The results indicate that P. cepacia ATCC 29351 possesses the genetic capacity for enzymes of both the ortho- and meta-cleavage pathways of benzoate degradation, although the phenotypic expression for the ortho pathway is higher. The simultaneous induction of catechol 1,2- and 2,3-dioxygenase is not detected in salicylate degradation. Although catechol is the metabolic intermediate for both salicylate and benzoate, catechol did not induce either pathway when used as a sole carbon source.

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  1. Biotechnology Program, College of Applied Sciences, Arabian Gulf University, P.O. Box 26671, Manama, Bahrain

    R. Y. Hamzah & B. S. Al-Baharna

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  1. R. Y. Hamzah
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  2. B. S. Al-Baharna
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Hamzah, R.Y., Al-Baharna, B.S. Catechol ring-cleavage in Pseudomonas cepacia: the simultaneous induction of ortho and meta pathways. Appl Microbiol Biotechnol 41, 250–256 (1994). https://doi.org/10.1007/BF00186968

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  • DOI: https://doi.org/10.1007/BF00186968

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