Halorespiring bacteria-molecular characterization and detection
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Published on: March 3, 2023
Smidt1, Akkermans, van der Oost J
1Laboratory of Microbiology, Wageningen University, Hesselink van Suchtelenweg 4, NL-6703 CT, Wageningen, The Netherlands
Abstract:
Recently, a rapidly increasing number of bacteria has been isolated that is able to couple the reductive dehalogenation of various halogenated aromatic and aliphatic compounds like chlorophenols and tetrachloroethene to energy conservation by electron-transport-coupled phosphorylation. The potential of these halorespiring bacteria for innovative clean-up strategies of polluted anoxic environments has greatly stimulated efforts to unravel the molecular basis of the novel respiratory chains they possess. The thorough characterization of halorespiratory key components at the physiological, biochemical and molecular genetic level has revealed both structural and functional similarity of chloroaryl- and chloroalkyl-respiratory chains from different phylogenetically distinct microorganisms. The reductive dehalogenases from halorespiring bacteria were found to comprise a novel class of corrinoid-containing Fe/S-proteins. Sensitive molecular methods for monitoring both presence and fate of halorespiring bacteria have been developed, which will be instrumental for the design and maintenance of optimised in situ bioremediation processes.
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