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. 1983 Jun;154(3):1356–1362. doi: 10.1128/jb.154.3.1356-1362.1983

Common induction and regulation of biphenyl, xylene/toluene, and salicylate catabolism in Pseudomonas paucimobilis.

K Furukawa, J R Simon, A M Chakrabarty
PMCID: PMC217611  PMID: 6343352

Abstract

A strain of Pseudomonas paucimobilis (strain Q1) capable of utilizing biphenyl was isolated from soil. This strain grew not only on substituted biphenyls, but also on salicylate, xylene or toluene or both (xylene/toluene), and substituted benzoates. Evidence is presented that the catabolism of biphenyl, xylene/toluene, and salicylate is regulated by a common unit in this strain. The catabolism of biphenyl, xylene/toluene, and salicylate is interrelated, since benzoate and toluate are common metabolic intermediates of biphenyl and xylene/toluene, and salicylate is produced from 2-hydroxybiphenyl (o-phenylphenol). All the oxidative enzymes of the biphenyl, xylene/toluene, and salicylate degradative pathways were induced when the cells were grown on either biphenyl, xylene/toluene or salicylate. The P. paucimobilis Q1 cells showed induction of the meta-cleavage enzymes of both 2,3-dihydroxybiphenyl and catechol. Biphenyl-negative derivatives of strain Q1 were simultaneously rendered xylene/toluene and salicylate negative, whereas reversion to the biphenyl-positive character of such derivatives invariably led to a xylene/toluene- and salicylate-positive phenotype. Growth of the P. paucimobilis Q1 cells with benzoate as a sole carbon source allowed the induction of only the ortho pathway enzymes, suggesting that biphenyl, xylene/toluene, or salicylate specifically induced the meta pathway enzymes for the oxidative degradation of these compounds.

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Selected References

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