Oxidation of arsenite by Thiomonas strains and characterization of Thiomonas arsenivorans sp. nov.
- 321 Downloads
A novel bacterium, strain b6T (T=type strain), was isolated from a disused mine site by growth using arsenite [As(III)] as energy source in a simple mineral medium. Cells of strain b6T were rod-shaped, Gram-negative, non-sporulating and motile. Optimum growth occurred at temperatures between 20 and 30 °C, and at pH between 4.0 and 7.5. Strain b6T grew chemoautotrophically on As(III), sulphur and thiosulphate, and also heterotrophically on yeast extract and a variety of defined organic compounds. Several other Thiomonas strains, including the type species Thiomonas (Tm.) intermedia, were able to oxidize As(III), though only strain b6T and strain NO115 could grow using As(III) as sole energy source in the absence of any organic compound. The G+C content of the DNA of strain b6T was 65.1 mol %. Comparative small subunit (SSU) ribosomal RNA (rRNA) analysis indicated that strain b6T belongs to the genus Thiomonas in the β-subdivision of the Proteobacteria. It was closely related to an unnamed Thiomonas strain (NO115) isolated from a Norwegian mining site, though sequence identities between strain b6T and characterized Thiomonas species were less than 95%. DNA–DNA hybridization between strain b6T and the type species of the genus Tm. intermedia showed less than 50% homology. On the basis of phylogenetic and phenotypic characteristics, strain b6T (DSM 16361T, LMG 22795T) is proposed as the type strain of the new species Thiomonas arsenivorans, sp. nov.
KeywordsArsenic Chemolithoautotrophy Oxidation Thiomonas arsenivorans sp. nov.
Modified Cheni As-oxidizing population Selective Medium
Unable to display preview. Download preview PDF.
This is the BRGM contribution no. 03922. We are grateful to Dr Peter Schumann (DSMZ) for his kind participation with the chemotaxonomic analyses. We also thank Karin Dekeyser (GRAM S.A), Manuel Clarens and Arnaud Denamur for their clear-sighted help in selecting, isolating and identifying the strain.
- Battaglia-Brunet F., Duquesne K., Dictor M.-C., Garrido F., Bonnefoy V., Baranger P. and Morin D. (2003). Arsenite oxidizing Thiomonas strains isolated from different mining sites. Geophys. Res. Abst. 5: 11069Google Scholar
- Coupland K., Battaglia-Brunet F., Hallberg K.B., Dictor M.-C., Garrido F. and Johnson D.B. (2004). Oxidation of iron, sulfur and arsenic in mine waters and mine wastes: an important role for novel Thiomonas spp. In: Tsezos M, Hatzikioseyian A & Remoudaki E. (eds). Biohydrometallurgy; a sustainable technology in evolution. National Technical University of Athens, Zografou, Greece, pp. 639–646Google Scholar
- Dennison F., Sen A.M., Hallberg K.B. and Johnson D.B. (2001). Biological versus abiotic oxidation of iron in acid mine drainage waters: an important role for moderately acidophilic, iron-oxidizing bacteria. In: Ciminelli VST & Garcia O. Jr. (eds). Biohydrometallurgy: Fundamentals, Technology and Sustainable Development, part B. Elsevier, Amsterdam, pp. 493–501Google Scholar
- Duquesne K. (2004). Rôle des bactéries dans la bioremédiation de l’arsenic dans les eaux acides de drainage de la mine de Carnoules. Thèse de doctorat Université de la Méditerranée, Aix-Marseille IIGoogle Scholar
- Hall T.A. (1999). BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic. Acids. Symp. Ser. 41: 95–98Google Scholar
- Huss V.A.R., Festl H. and Schleifer K.H. (1983). Studies on the spectrophotometric determination of DNA hybridization from renaturation rates. Syst. Appl. Microbiol. 4: 184–192Google Scholar
- Jukes T.H. and Cantor C.R. (1969). Evolution of protein molecules. In: Munro H.N. (eds). Mammalian Protein Metabolism. Academic Press, New York, pp. 211–232Google Scholar
- Katayama-Fujimura Y. and Kuraishi H. (1983). Emendation of Thiobacillus perometabolis London and Rittenberg 1967. Int. J. Sys. Bacteriol. 33: 650–651Google Scholar
- London J. (1963). Thiobacillus intermedius nov. sp., a novel type of facultative autotroph. Arch. Microbiol. 46: 329–337Google Scholar
- London J. and Rittenberg S.C. (1967). Thiobacillus perometabolis nov. sp., a non-autotrophic Thiobacillus. Arch. Microbiol. 59: 218–225Google Scholar
- Saito N. and Nei M. (1987). The neighbor-joining method: a new method for reconstructing phylogenetic trees. Mol. Biol. Evol. 4: 405–425Google Scholar
- Wayne L.G., Brenner D.J., Colwell R.R., Grimont P.A.D., Kandler O., Krichevsky M.I., Moore L.H., Moore W.E.C., Murray R.G.E., Stackebrandt E., Starr M.P. and Trüper H.G. (1987). Report of the ad hoc committee on reconciliation of approaches to bacterial systematics. Int. J. Syst. Bacteriol. 37: 463–464CrossRefGoogle Scholar