Organohalide Respiring Bacteria and Reductive Dehalogenases: Key Tools in Organohalide Bioremediation

Frontiers in Microbiology

Haluk eErtan¹  Susanne eBohl²  Michael eManefield³  Bat-Erdene eJugder³  Matthew eLee³  Christopher Peter Marquis³ 

[1] Istanbul University;Mannheim University of Applied Sciences;The University of New South Wales;

关键词: bioremediation;    Dehalococcoides;    organohalide respiration;    Dehalobacter;    reductive dehalogenase;   

DOI  :  10.3389/fmicb.2016.00249

来源: DOAJ

【 摘 要 】

Organohalides are recalcitrant pollutants that have been responsible for substantial contamination of soils and groundwater. Organohalide-respiring bacteria (ORB) provide a potential solution to remediate contaminated sites, through their ability to use organohalides as terminal electron acceptors to yield energy for growth (i.e. organohalide respiration). Ideally, this process results in non- or lesser-halogenated compounds that are mostly less toxic to the environment or more easily degraded. At the heart of these processes are reductive dehalogenases (RDase), which are membrane bound enzymes coupled with other components that facilitate dehalogenation of organohalides to generate cellular energy. This review focuses RDases, concentrating on those which have been purified (partially or wholly) and functionally characterized. Further, the paper reviews the major bacteria involved in organohalide breakdown and the evidence for microbial evolution of RDases. Finally, the capacity for using ORB in a bioremediation and bioaugmentation capacity are discussed.

【 授权许可】

Unknown