Halorubrum aethiopicum sp. nov., an extremely halophilic archaeon isolated from commercial rock salt
Gibtan, Ashagrie and Song, Hye Seon and Kim, Joon Yong and Kim, Yeon Bee and Park, Nakyeong and Park, Kyounghee and Lee, Sang-Jae and Kwon, Joseph and Roh, Seong Woon and Lee, Han-Seung,, 68, 416-422 (2018),
doi = https://doi.org/10.1099/ijsem.0.002525,
publicationName = Microbiology Society,
issn = 1466-5026,
abstract= A novel extremely halophilic archaeon, designated SAH-A6T, was isolated from a sample of commercial rock salt in Ethiopia. Cells of SAH-A6T were aerobic and pleomorphic. The strain was able to grow at concentrations of 15–30 % (w/v) NaCl (optimum 20–25 % NaCl), at pH 6.0–9.0 (optimum pH 7.0) and in a temperature range of 30–55 °C (optimum 37–45 °C). Mg2+ was not required for growth of SAH-A6T cells. On the basis of 16S rRNA gene sequence analysis, strain SAH-A6T was closely related to Halorubrum halodurans Cb34T (99.1 %), Halorubrum rubrum YC87T (98.9 %), Halorubrum aquaticum EN-2T (98.7 %), Halorubrum cibi JCM 15757T (98.4 %), Halorubrum luteum CGSA15T (97.3 %), Halorubrum lipolyticum 9-3T (97.1 %), Halorubrum tibetense 8W8T (97.1 %), Halorubrum kocurii JCM 1478T (97.1 %), Halorubrum halophilum B8T (97.0 %) and Halorubrum persicum C49T (97.0 %). Phylogenetic analysis based on the rpoB' gene sequences showed that strain SAH-A6T was closely related to Hrr. halodurans Cb34T (99.7 %), Hrr. aquaticum JCM 14031T (99.3 %) and other members of the genus Halorubrum (<99.0 %). The DNA G+C content of the strain was 68.0 mol%. DNA–DNA hybridization between strain SAH-A6T and the most closely related members of the genus Halorubrum were below 55 %, suggesting that the new isolate constitutes a different genospecies. On the bases of chemotaxonomic, phenotypic and genotypic data, strain SAH-A6T (=KCCM 43215T=JCM 31519T) represents a novel species of the genus Halorubrum , for which the name Halorubrum aethiopicum sp. nov. is proposed.,
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