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. 1987 Jun;169(6):2889-92.
doi: 10.1128/jb.169.6.2889-2892.1987.

Recruitment of naphthalene dissimilatory enzymes for the oxidation of 1,4-dichloronaphthalene to 3,6-dichlorosalicylate, a precursor for the herbicide dicamba

D R Durham, D B Stewart

Recruitment of naphthalene dissimilatory enzymes for the oxidation of 1,4-dichloronaphthalene to 3,6-dichlorosalicylate, a precursor for the herbicide dicamba

D R Durham et al. J Bacteriol. 1987 Jun.

Abstract

Pseudomonas putida expresses plasmid-encoded enzymes and regulatory proteins for the dissimilation of naphthalene through salicylate and the alpha-keto acid pathway. A strain of P. putida (NAH:Tn5/G67) defective in salicylate hydroxylase (nahG) was assessed for its ability to oxidize 1,4-dichloronaphthalene. Washed cell suspensions were shown to accumulate 3,6-dichlorosalicylate, which, after further chemical treatment, yields the herbicide dicamba (3,6-dichloro-2-methoxybenzoate). However, the rate of dichlorosalicylate formation from dichloronaphthalene was less than 1% of the rate of salicylate formation from unsubstituted naphthalene.

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