Transformation of 2-chloroquinoline to 2-chloro-cis-7,8-dihydro-7,8- dihydroxyquinoline by quinoline-grown resting cells of Pseudomonas putida 86.
S Fetzner, B Vogler, F Lingens
Index: FEMS Microbiol. Lett. 112(2) , 151-7, (1993)
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Abstract
Resting cells of Pseudomonas putida strain 86 were grown on quinoline transformed 2-chloroquinoline to 2-chloro-cis-7,8-dihydro-7,8-dihydroxyquinoline which was not converted further. 7,8-Dioxygenating activity was present when the enzymes of quinoline catabolism were induced. Quinoline-grown cells of strain 86 treated simultaneously with 2-chloroquinoline and D-(-)-threo-chloramphenicol to prevent protein biosynthesis also formed the cis-7,8-dihydrodiol of 2-chloroquinoline. Succinate-grown resting cells did not oxidize 2-chloroquinoline. Acid-catalyzed decomposition of 2-chloro-cis-7,8-dihydro-7,8-dihydroxyquinoline predominantly yielded 2-chloro-8-hydroxyquinoline. By analogy, accumulation of the putative dead-end metabolite 1H-8-hydroxy-2-oxoquinoline during growth of P. putida 86 on quinoline is suggested to likewise result from dehydration of the 7,8-dihydrodiol of 1H-2-oxoquinoline.
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