Abstract:
:Pseudomonas putida F1 and Pseudomonas sp. strain JS150 initiate toluene degradation by incorporating molecular oxygen into the aromatic nucleus to form cis-1,2-dihydroxy-3-methylcyclohexa-3,5-diene. When toluene-grown cells were incubated with 2- and 3-nitrotoluene, the major products identified were 2- and 3-nitrobenzyl alcohol, respectively. The same cells oxidized 4-nitrotoluene to 2-methyl-5-nitrophenol and 3-methyl-6-nitrocatechol. Escherichia coli JM109(pDTG601), which contains the toluene dioxygenase genes from P. putida F1 under the control of the tac promoter, oxidized the isomeric nitrotoluenes to the same metabolites as those formed by P. putida F1 and Pseudomonas sp. strain JS150. These results extend the range of substrates known to be oxidized by this versatile enzyme and demonstrate for the first time that toluene dioxygenase can oxidize an aromatic methyl substituent.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
Robertson JB,Spain JC,Haddock JD,Gibson DTdoi
10.1128/AEM.58.8.2643-2648.1992keywords:
subject
Has Abstractpub_date
1992-08-01 00:00:00pages
2643-8issue
8eissn
0099-2240issn
1098-5336journal_volume
58pub_type
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