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Applied and Environmental Microbiology, April 2007, p. 2386-2389, Vol. 73, No. 7
0099-2240/07/$08.00+0     doi:10.1128/AEM.02789-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

New Insights into Microbial Oxidation of Antimony and Arsenic{triangledown}

Corinne R. Lehr,{dagger} Des R. Kashyap, and Timothy R. McDermott*

Department of Land Resources & Environmental Sciences and the Thermal Biology Institute, Montana State University, Bozeman, Montana 59717

Received 29 November 2006/ Accepted 4 February 2007

Sb(III) oxidation was documented in an Agrobacterium tumefaciens isolate that can also oxidize As(III). Equivalent Sb(III) oxidation rates were observed in the parental wild-type organism and in two well-characterized mutants that cannot oxidize As(III) for fundamentally different reasons. Therefore, despite the literature suggesting that Sb(III) and As(III) may be biochemical analogs, Sb(III) oxidation is catalyzed by a pathway different than that used for As(III). Sb(III) and As(III) oxidation was also observed for an eukaryotic acidothermophilic alga belonging to the order Cyanidiales, implying that the ability to oxidize metalloids may be phylogenetically widespread.

* Corresponding author. Mailing address: Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, MT 59717. Phone: (406) 994-2190. Fax: (406) 994-3933. E-mail: timmcder{at}montana.edu.

{triangledown} Published ahead of print on 16 February 2007.

{dagger} Present address: Department of Chemistry and Biochemistry, California Polytechnic State University, San Luis Obispo, CA 93407.

Applied and Environmental Microbiology, April 2007, p. 2386-2389, Vol. 73, No. 7
0099-2240/07/$08.00+0     doi:10.1128/AEM.02789-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.





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Copyright © 2007 by the American Society for Microbiology. All rights reserved.