1887

International Journal of Systematic and Evolutionary Microbiology

Volume 54, Issue 5

sp. nov., a thermophilic, acidophilic bacterium isolated from Coso Hot Springs, California, USA Free

Abstract

A thermo-acidophilic Gram-positive bacterium, strain CsHg2, which grows aerobically at 35–65 °C (optimum 55 °C) and at pH 2·0–6·0 (optimum 4·0), was isolated from a geothermal pool located in Coso Hot Springs in the Mojave Desert, California, USA. Phylogenetic analysis of 16S rRNA gene sequences showed that this bacterium was most closely related to the type strains of (97·8 % identity) and (96·9 %), three Japanese strains denoted as UZ-1, KHA-31 and MIH 332 (96·1–96·5 %) and genomic species FR-6 (96·3 %). Phenotypic characteristics including temperature and pH optima, G+C composition, acid production from a variety of carbon sources and sensitivity to different metal salts distinguished CsHg2 from , and FR-6. The cell lipid membrane was composed mainly of -cyclohexyl fatty acid, consistent with membranes from other species. Very low DNA–DNA hybridization values between CsHg2 and the type strains of indicate that CsHg2 represents a distinct species. On the basis of these results, the name sp. nov. is proposed for this organism. The type strain is CsHg2 (ATCC BAA-915=DSM 16176).

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2004-09-01
2020-01-23
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Alicyclobacillus vulcanalis sp. nov., a thermophilic, acidophilic bacterium isolated from Coso Hot Springs, California, USA
Int J Syst Evol Microbiol 54, 1703 (2004); https://doi.org/10.1099/ijs.0.03012-0
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