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Herminiimonas arsenicoxydans sp. nov., a metalloresistant bacterium

Daniel Muller^1,, Diliana D. Simeonova^1,, Philippe Riegel², Sophie Mangenot³, Sandrine Koechler¹, Didier Lièvremont¹, Philippe N. Bertin¹ and Marie-Claire Lett¹

¹ Génétique Moléculaire, Génomique, Microbiologie, UMR 7156, CNRS and Université Louis-Pasteur, 28 rue Goethe, 67000 Strasbourg, France
² Laboratoire de Physiopathologie des Infections Bactériennes Émergentes et Nosocomiales, Faculté de Médecine, Université Louis-Pasteur, 3 rue Koeberlé, 67000 Strasbourg, France
³ Génoscope – Centre National de Séquençage, 2 rue Gaston Crémieux, CP5706, 91057 Evry cedex, France

Correspondence
Marie-Claire Lett
lett{at}gem.u-strasbg.fr

An arsenite-oxidizing bacterium, designated strain ULPAs1^T, was isolated from industrial sludge heavily contaminated with arsenic. Cells of this isolate were Gram-negative, curved rods, motile by means of a polar flagellum. The strain was positive for oxidase and catalase activities, was able to reduce nitrate to nitrite, used acetate, lactate and peptone as organic carbon sources under aerobic conditions and was able to oxidize arsenite (As[III]) to arsenate (As[V]). 16S rRNA gene sequence analysis and the absence of dodecanoic fatty acids suggested that this strain represents a member of the genus Herminiimonas of the family Oxalobacteraceae, order Burkholderiales in the Betaproteobacteria. Genomic DNA–DNA hybridization between strain ULPAs1^T and Herminiimonas fonticola S-94^T and between strain ULPAs1^T and Herminiimonas aquatilis CCUG 36956^T revealed levels of relatedness of <10 %, well below the recommended 70 % species cut-off value. Thus, strain ULPAs1^T (=CCM 7303^T=DSM 17148^T=LMG 22961^T) is the type strain of a novel species of Herminiimonas, for which the name Herminiimonas arsenicoxydans sp. nov. is proposed.

Present address: Division of Bacterial Infection, Institute of Medical Science, University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.

Present address: Department of Biology, Laboratory of Ecology, Physiology and Biochemistry of Microorganisms, University of Konstanz, D-78457 Konstanz, Germany.

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