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J Bacteriol. 1982 March; 149(3): 1096-1101

Naphthalene plasmids in pseudomonads.

ABSTRACT

A rapid method beginning with the direct lysis of bacteria in alkaline sodium dodecyl sulfate was used to detect naphthalene plasmids in pseudomonads. The strains NCIB 9816, PG, ATCC 17483, and ATCC 17484, which can grow on naphthalene as the sole source of carbon and energy, were examined. All except ATCC 17483 contained more than one plasmid. ATCC 17483 did not contain any plasmids. The largest pair of plasmids found in each of NCIB 9816 and PG(NAH2 and NAH3, respectively) determined naphthalene metabolism and could be transferred by conjugation. This also transferred the unusually regulated meta pathway enzymes for catechol metabolism. NAH2 determines the constitutive production of low concentrations of catechol 2,3-dioxygenase and 2-hydroxymuconic acid semialdehyde dehydrogenase, and NAH3 determines the constitutive production of high concentration of these. NAH2 and NAH3 gave identical fragments on digestion with BamHI or HindIII, but these were quite different from those of NAH. Nonetheless, NAH2 and NAH3 hybridized with NAH.

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