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. 1980 Feb;39(2):288–296. doi: 10.1128/aem.39.2.288-296.1980

Metabolism of Dibenzo-p-Dioxin and Chlorinated Dibenzo-p- Dioxins by a Beijerinckia Species

Gary M Klečka 1, David T Gibson 1
PMCID: PMC291325  PMID: 16345500

Abstract

Whole cells of the parent strain of Beijerinckia, grown with succinate and biphenyl, oxidized dibenzo-p-dioxin and several chlorinated dioxins. The rate of oxidation of the chlorinated dibenzo-p-dioxins decreased with an increasing degree of chlorine substitution. A mutant strain (B8/36) of Beijerinckia oxidized dibenzo-p-dioxin to cis-1,2-dihydroxy-1,2-dihydrodibenzo-p-dioxin. The mutant organism also oxidized two monochlorinated dibenzo-p-dioxins to cis-dihydrodiols. No metabolites were detected from two dichlorinated dibenzo-p-dioxins. Growth of the parent strain of Beijerinckia on succinate was inhibited after 4 h when 0.05% dibenzo-p-dioxin was present in the culture medium. Resting cell suspensions of the parent organism, previously grown with succinate and biphenyl, oxidized dibenzo-p-dioxin to a compound identified as 1,2-dihydroxydibenzo-p-dioxin. Further degradation of this metabolite was not detected, as the compound was found to be a potent mixed-type inhibitor of two ring-fission oxygenases present in this organism.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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