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Appl. Environ. Microbiol., Sep 1995, 3490-3493, Vol 61, No. 9
Copyright © 1995, American Society for Microbiology

Transformation of Substituted Fluorenes and Fluorene Analogs by Pseudomonas sp. Strain F274

M Grifoll, SA Selifonov and PJ Chapman
Department of Microbiology, University of Barcelona, 08028 Barcelona, Spain; Center for Environmental Diagnostic and Bioremediation, University of West Florida, Pensacola, Florida 32514; Department of Biochemistry, University of Minnesota, St. Paul, Minnesota 55108; and Environmental Research Laboratory, U.S. Environmental Protection Agency, Gulf Breeze, Florida 32561

Pseudomonas sp. strain F274, previously shown to catabolize fluorene via fluorenone and its angular dioxygenation, 2(prm1),3(prm1)-dihydroxy-2-carboxybiphenyl, phthalate, and protocatechuate, was examined for its ability to transform substituted fluorenes and S- and N-heterocyclic analogs. Halogen- and methyl-substituted fluorenes were metabolized to correspondingly substituted phthalates via attack on the unsubstituted ring. In the case of 1-methylfluorene, initial oxidation of the methyl group to carboxyl prevented all other transformations but 9-monooxygenation. This strain also oxidized the S-heteroatoms and benzylic methylenic groups of fluorene analogs. No angular dioxygenation of S- and N-heterocycles was observed.

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