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  • Title: Alicyclobacillus tengchongensis sp. nov., a thermo-acidophilic bacterium isolated from hot spring soil.
    Author: Kim MG, Lee JC, Park DJ, Li WJ, Kim CJ.
    Journal: J Microbiol; 2014 Oct; 52(10):884-9. PubMed ID: 25037879.
    Abstract:
    A thermo-acidophilic bacterium, designated strain ACK006(T), was isolated from the soil of a hot spring at Tengchong in China. Cells were Gram-staining-positive, motile, catalase-positive and oxidase-negative, spore-forming rods. The isolate grew aerobically at 30-50°C (optimum at 45°C), pH 2.0-6.0 (optimum pH 3.2) and 0-5.0% (w/v) NaCl (optimum 1% NaCl). Phylogenetic analyses based on 16S rRNA gene sequences indicated that strain ACK006(T) belongs to the genus Alicyclobacillus with the sequence similarity of 92.3, 92.4, 92.5, and 92.8% to Alicyclobacillus cycloheptanicus SCH(T), Alicyclobacillus ferrooxydans TC-34(T), Alicyclobacillus contaminans 3-A191(T) and Alicyclobacillus disulfidooxidans SD-11(T), respectively. Similarity to other species of the genus Alicyclobacillus was 90.3-92.8% and similarity to species of the genus Tumebacillus was 85.9-87.8%. The genomic DNA G+C content was 53.7 mol%. The predominant menaquinone was MK-7. Major fatty acids were ω-cycloheptane C18:0, iso-C17:0 and anteiso-C17:0. The cell-wall peptidoglycan was the A1γ type; containing meso-diaminopimelic acid as the diagnostic diamino acid. On the basis of polyphasic analysis from this study, strain ACK006(T) represents a novel species of the genus Alicyclobacillus for which the name Alicyclobacillus tengchongensis sp. nov. is proposed. The type strain is ACK006(T) (=KCTC 33022(T) =DSM 25924(T)).
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