Affiliation:
1. Institut für Mikrobiologie der Gesellschaft für Strahlen-und Umweltforschung, D-3400 Göttingen, West Germany
Abstract
Alcaligenes eutrophus
B9 and
Pseudomonas sp.
B13 could be adapted to 2-fluorobenzoate as the sole source of carbon and energy. The ability of the
A. eutrophus
B9 to use this new substrate is clearly based on the defective dihydrodihydroxybenzoate dehydrogenase. Nontoxic 6-fluoro-3,5-cyclohexadiene-1,2-diol-1-carboxylic acid is accumulated instead of 3-fluorocatechol. About 84% of the substrate is dioxygenated to catechol and utilized via the 3-oxoadipate pathway. During continuous adaptation of
Pseudomonas
sp. B13 regioselectivity of dioxygenation of 2-fluorobenzoate is drastically changed in favor of a 1,2-attack. Consequently, approximately 97% of the substrate is utilized via catechol. A three- to fourfold overproduction of key enzymes of the 3-oxoadipate pathway compensates for the slower turnover rates of the fluorinated substrates.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
80 articles.
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