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Microbial oxidation of arsenite in a subarctic environment: diversity of arsenite oxidase genes and identification of a psychrotolerant arsenite oxidiser |
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| Authors: | Thomas H Osborne Heather E Jamieson Karen A Hudson-Edwards D Kirk Nordstrom Stephen R Walker Seamus A Ward Joanne M Santini |
| Affiliation: | (1) Institute of Structural and Molecular Biology, UCL, Darwin Building, Gower Street, WC1E 6BT London, UK;(2) Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, Ontario, K7L 3N6, Canada;(3) Department of Earth and Planetary Sciences, Birkbeck, University of London, Malet Street, London, WC1E 7HX, UK;(4) US Geological Survey Boulder, 80303 Colorado, USA;(5) Research Department of Genetics, Evolution and Environment, UCL, Darwin Building, Gower Street, WC1E 6BT London, UK |
| Abstract: | BackgroundArsenic is toxic to most living cells. The two soluble inorganic forms of arsenic are arsenite (+3) and arsenate (+5), with arsenite the more toxic. Prokaryotic metabolism of arsenic has been reported in both thermal and moderate environments and has been shown to be involved in the redox cycling of arsenic. No arsenic metabolism (either dissimilatory arsenate reduction or arsenite oxidation) has ever been reported in cold environments (i.e. < 10°C). |
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