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Titel (primär) Reductive dehalogenation of chlorinated dioxins by an anaerobic bacterium
Autor Bunge, M.; Adrian, L.; Kraus, A.; Opel, M.; Lorenz, W.G.; Andreesen, J.R.; Görisch, H.; Lechner, U.;
Journal / Serie Nature
Erscheinungsjahr 2003
Department ISOBIO;
Band/Volume 421
Heft 6921
Sprache englisch;
Abstract Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs and PCDFs) are among the most notorious environmental pollutants. Some congeners, particularly those with lateral chlorine substitutions at positions 2, 3, 7 and 8, are extremely toxic and carcinogenic to humans1. One particularly promising mechanism for the detoxification of PCDDs and PCDFs is microbial reductive dechlorination. So far only a limited number of phylogenetically diverse anaerobic bacteria have been found that couple the reductive dehalogenation of chlorinated compounds—the substitution of a chlorine for a hydrogen atom—to energy conservation and growth in a process called dehalorespiration2. Microbial dechlorination of PCDDs occurs in sediments and anaerobic mixed cultures from sediments, but the responsible organisms have not yet been identified or isolated. Here we show the presence of a Dehalococcoides species in four dioxin-dechlorinating enrichment cultures from a freshwater sediment highly contaminated with PCDDs and PCDFs. We also show that the previously described chlorobenzene-dehalorespiring bacterium Dehalococcoides sp. strain CBDB1 (ref. 3) is able to reductively dechlorinate selected dioxin congeners. Reductive dechlorination of 1,2,3,7,8-pentachlorodibenzo-p-dioxin (PeCDD) demonstrates that environmentally significant dioxins are attacked by this bacterium.
ID 4758
dauerhafte UFZ-Verlinkung
Bunge, M., Adrian, L., Kraus, A., Opel, M., Lorenz, W.G., Andreesen, J.R., Görisch, H., Lechner, U. (2003):
Reductive dehalogenation of chlorinated dioxins by an anaerobic bacterium
Nature 421 (6921), 357 - 360