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  • Title: Sulfurihydrogenibium yellowstonense sp. nov., an extremely thermophilic, facultatively heterotrophic, sulfur-oxidizing bacterium from Yellowstone National Park, and emended descriptions of the genus Sulfurihydrogenibium, Sulfurihydrogenibium subterraneum and Sulfurihydrogenibium azorense.
    Author: Nakagawa S, Shtaih Z, Banta A, Beveridge TJ, Sako Y, Reysenbach AL.
    Journal: Int J Syst Evol Microbiol; 2005 Nov; 55(Pt 6):2263-2268. PubMed ID: 16280480.
    Abstract:
    A novel thermophilic, sulfur-oxidizing Gram-negative bacterium, designated strain SS-5T, was isolated from the Calcite Hot Springs in Yellowstone National Park, USA. The cells were motile rods (1.2-2.8 microm long and 0.6-0.8 microm wide). The new isolate was a facultative heterotroph capable of using elemental sulfur or thiosulfate as an electron donor and O2 (1-18 %; optimum 6 %, v/v) as an electron acceptor. Hydrogen did not support growth. The isolate grew autotrophically with CO2. In addition, strain SS-5T utilized various organic carbon sources such as yeast extract, tryptone, sugars, amino acids and organic acids. Growth was observed between 55 and 78 degrees C (optimum 70 degrees C; 3.5 h doubling time), pH 6.0 and 8.0 (optimum pH 7.5), and 0 and 0.6 % (w/v) NaCl (optimum 0 %). The G+C content of the genomic DNA was 32 mol%. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that the isolate was a member of the genus Sulfurihydrogenibium. On the basis of the physiological and molecular characteristics of the new isolate, we propose the name Sulfurihydrogenibium yellowstonense sp. nov. with SS-5T (=JCM 12773T=OCM 840T) as the type strain. In addition, emended descriptions of the genus Sulfurihydrogenibium, Sulfurihydrogenibium subterraneum and Sulfurihydrogenibium azorense are proposed.
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