© 2017 IUMS. Bacterial strain HPK2-2T was isolated from soil adjacent to the caldera of Kilauea Volcano in Hawaii Volcanoes National Park. HPK2-2T is a chemoorganoheterotroph that shows optimal growth at 50 °C (range 45-55 °C) and pH 8.0 (range 5.0-10.0). Sequence analysis of the 16S subunit of the rRNA gene showed that HPK2-2T is most closely related to the type strain of Rubrobactertaiwanensis (ATCC BAA-406T), with which it shared 94.5% sequence identity. The major fatty acids detected in HPK2-2T were C18:0 14-methyl and C16:0 12-methyl; internally branched fatty acids such as these are characteristic of the genus Rubrobacter. The only respiratory quinone detected was MK-8, which is the major respiratory quinone for all members of the family Rubrobacteraceae examined thus far. We propose that HPK2-2T represents a novel species of the genus Rubrobacter, for which we propose the name Rubrobacterspartanus (type strain HPK2-2T; DSM 102139T; LMG 29988T).
Publication Source (Journal or Book title)
International Journal of Systematic and Evolutionary Microbiology
Norman, J., King, G., & Friesen, M. (2017). Rubrobacter spartanus sp. nov., a moderately thermophilic oligotrophic bacterium isolated from volcanic soil. International Journal of Systematic and Evolutionary Microbiology, 67 (9), 3597-3602. https://doi.org/10.1099/ijsem.0.002175