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Desulfonispora thiosulfatigenes gen. nov., sp. nov., a taurine-fermenting, thiosulfate-producing anaerobic bacterium

¹ Fakultät for Biologie der Universitat, D-78457 Konstanz, Germany
² DSMZ - Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1b, D-38124 Braunschweig, Germany

Author for correspondence: Alasdair M. Cook. Tel: +49 7531 88 4247. Fax: +49 7531 88 2966. e-mail: alasdair.cook{at}uni-konstanz.de

ABSTRACT

Strain GKNTAU^T has been described as a bacterium able to ferment the organosulfonate taurine (2-aminoethanesulfonate) quantitatively to acetate, ammonia and thiosulfate, an unusual metabolic product. This novel fermentation has now also been observed in four independent isolates from two continents. All five organisms were strictly anaerobic, Gram-positive, motile, spore-forming bacteria. Enrichments with isethionate (2-hydroxyethanesulfonate) and cysteate (2-amino-3-sulfopropionate), in contrast, yielded bacteria that disproportionated the sulfonate to sulfate and sulfide. The phylogenetic location of the taurine fermenters was analysed on the basis of 16S rDNA sequences. Strain GKNTAU^T (= DSM 11270^T = ATCC 700533^T) is described as the type strain of a new genus and species, for which the name Desulfonispora thiosulfatigenes gen. nov., sp. nov. is proposed.

Key Words: Desulfonispora thiosulfatigenes • taurine • thiosulfate • sulfonate • anaerobic desulifonation

The GenBank/EMBL/DDBJ accession number for the 16S rDNA sequence from Desulfonispora thiosulfatigenes DSM 11270^T is Y18214.

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