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Salsuginibacillus kocurii gen. nov., sp. nov., a moderately halophilic bacterium from soda-lake sediment

¹ Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, 41012 Sevilla, Spain
² State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, 100101 Beijing, People's Republic of China
³ Department of Biotechnology, University of the Western Cape, Bellville 7535, Cape Town, South Africa
⁴ Genencor International BV, Archimedesweg 30, 2333 CN Leiden, The Netherlands
⁵ Department of Infection, Immunity and Inflammation, University of Leicester, Leicester LE1 9HN, UK

Correspondence
M. C. Márquez
cmarquez{at}us.es

A Gram-positive, endospore-forming, alkali-tolerant, moderately halophilic bacterium, designated strain CH9d^T, was isolated from the sediment of Lake Chagannor in the Inner Mongolia Autonomous Region, China. The cells were rod-shaped and motile. Isolate CH9d^T grew at pH 5.8–10.0 (optimally at pH 8.5), at salinities of 3–20 % (w/v) marine salts (optimally at 10.0 %, w/v) and between 20 and 50 °C (optimally at 37 °C). The cell wall contained meso-diaminopimelic acid and the major respiratory isoprenoid quinone was MK-7. The predominant cellular fatty acids of strain CH9d^T were anteiso-C_{15 : 0}, anteiso-C_{17 : 0}, iso-C_{17 : 0} and iso-C_{15 : 0} and its polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and two unknown phospholipids. The G+C content of the DNA was 44.7 mol%. Strain CH9d^T exhibited a 16S rRNA gene sequence similarity value of only 91 % with respect to Thalassobacillus devorans DSM 16966^T and showed values below 91 % with respect to members of the genera Bacillus, Halobacillus and Marinococcus. Strain CH9d^T could be clearly differentiated from its closest phylogenetic neighbours on the basis of several phenotypic, genotypic and chemotaxonomic features. Therefore, data from the polyphasic study support the placement of strain CH9d^T in a novel genus and species, for which the name Salsuginibacillus kocurii gen. nov., sp. nov. is proposed. The type strain is CH9d^T (=CCM 7365^T=CECT 7154^T=CGMCC 1.6287^T=DSM 18087^T).

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