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Appl Environ Microbiol. 2000 Jun;66(6):2297-301.

Reductive dehalogenation of trichloroacetic acid by Trichlorobacter thiogenes gen. nov., sp. nov.

Author information

1
Michigan State University, Center for Microbial Ecology, East Lansing, Michigan 48824-1325, USA. heleen.dewever@agr.kuleuven.ac.de

Abstract

A bacterium able to grow via reductive dechlorination of trichloroacetate was isolated from anaerobic soil enrichments. The isolate, designated strain K1, is a member of the delta proteobacteria and is related to other known sulfur and ferric iron reducers. In anaerobic mineral media supplemented with acetate and trichloroacetate, its doubling time was 6 h. Alternative electron donor and acceptors were acetoin and sulfur or fumarate, respectively. Trichloroacetate dehalogenation activity was constitutively present, and the dechlorination product was dichloroacetate and chloride. Trichloroacetate conversion seemed to be coupled to a novel sulfur-sulfide redox cycle, which shuttled electrons from acetate oxidation to trichloroacetate reduction. In view of its unique physiological characteristics, the name Trichlorobacter thiogenes is suggested for strain K1.

PMID:
10831402
PMCID:
PMC110515
DOI:
10.1128/aem.66.6.2297-2301.2000
[Indexed for MEDLINE]
Free PMC Article

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