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  • Title: Halostella salina gen. nov., sp. nov., an extremely halophilic archaeon isolated from solar salt.
    Author: Song HS, Cha IT, Rhee JK, Yim KJ, Kim AY, Choi JS, Baek SJ, Seo MJ, Park SJ, Nam YD, Roh SW.
    Journal: Int J Syst Evol Microbiol; 2016 Jul; 66(7):2740-2746. PubMed ID: 27118259.
    Abstract:
    A novel halophilic archaeon designated strain CBA1114T was isolated from solar salt in the Republic of Korea. Strain CBA1114T, cells of which were coccoid and Gram-stain-negative, grew in the presence of 15-30 % (w/v) NaCl (optimum, 20 %) and at 20-50 °C (optimum, 40 °C) and pH 7.0-9.0 (optimum, pH 8.0). Strain CBA1114T required Mg2+ for growth. Strain CBA1114T had three 16S rRNA genes, rrnA, rrnB and rrnC; levels of similarity between the sequences were 99.7-99.9 %. The 16S rRNA gene sequence of strain CBA1114T showed 91.7 % similarity to that of Haloterrigena thermotolerans PR5T. In multilocus sequence analysis (MLSA), five housekeeping genes, atpB, EF-2, radA, rpoB' and secY, were found to be closely related to those of the members of the genera Halorientalis(89.7 % similarity of the atpB gene sequence), Halomicroarcula(91.9 %, EF-2), Haloterrigena(85.4 %, radA), Natronoarchaeum(89.2 %, rpoB') and Natrinema(75.7 %, secY). A phylogenetic tree generated from the results of MLSA of the five housekeeping genes showed that strain CBA1114T was closely related to species of the genus Halorientalis in the family Halobacteriaceae. The major polar lipids were identified as phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester and unidentified lipids. The G+C content of the genomic DNA of strain CBA1114T was 68.1 mol%. According to the results of phylogenetic, phenotypic and chemotaxonomic analyses, we designate strain CBA1114T (=JCM 30111T=KCTC 4206T) as the type strain of Halostella salina gen. nov., sp. nov., a novel species of a new genus within the family Halobacteriaceae.
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