1887

Abstract

A novel autotrophic, thermophilic bacterium, strain TF1, was isolated from a hot spring in Japan. Cells of strain TF1 were motile, Gram-stain-negative, rod-shaped, 1.0–2.0 μm in length and 0.5–0.6 μm in width. Major components in the cellular fatty acid profile were C, C and anteiso-C. The temperature range for growth was 40–77 °C, and optimum temperature was 75 °C. The pH range for growth was 5.9–9.5, and the optimum pH was 7.5–8.8. Strain TF1 grew chemolithoautotrophically by disproportionation of sulfur, thiosulfate and sulfite. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the strain belongs to the family . The closest cultivated relative was DS, with highest 16S rRNA gene sequence similarity of 96 %. The genome of strain TF1 consists of one circular chromosome, with a size of 1.8 Mbp and G+C content of 38.30 mol%. On the basis of its phylogenetic and phenotypic properties, strain TF1 ( = DSM 29380 = NBRC 110713) is proposed as the type strain of a novel species, sp. nov.

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2016-04-01
2022-01-18
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