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J Bacteriol. 1973 June; 114(3): 974-979
Copyright © 1973 American Society for Microbiology. All Rights Reserved.

Transmissible Plasmid Coding Early Enzymes of Naphthalene Oxidation in Pseudomonas putida

N. W. Dunn and I. C. Gunsalus

1 School of Chemical Sciences, University of Illinois, Urbana, Illinois 61801

ABSTRACT

The capacity of Pseudomonas putida PpG7 (ATCC 17,485) to grow on naphthalene, phenotype Nah+, is lost spontaneously, and the frequency is increased by treatment with mitomycin C. The Nah+ growth character can be transferred to cured or heterologous fluorescent pseudomonads lacking this capacity by conjugation, or between phage pf16-sensitive strains by transduction. After mutagenesis, strains can be selected with increased donor capacity in conjugation. Clones which use naphthalene grow on salicylate and carry catechol 2,3-oxygenase, the initial enzyme of the aromatic {alpha}-keto acid pathway, whereas cured strains grow neither on salicylate nor naphthalene and lack catechol 2,3-oxygenase, but retain catechol 1,2-oxygenase and the aromatic ß-keto adipate pathway enzymes.


J Bacteriol. 1973 June; 114(3): 974-979
Copyright © 1973 American Society for Microbiology. All Rights Reserved.




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