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Bacillus chagannorensis sp. nov., a moderate halophile from a soda lake in Inner Mongolia, China

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, Beijing 100101, People's Republic of China
³ Department of Biotechnology, University of the Western Cape, Bellville 7535, Cape Town, South Africa
⁴ Genencor International BV, 2333 CN Leiden, The Netherlands
⁵ Department of Infection, Immunity and Inflammation, University of Leicester, Leicester LE1 9HN, UK

Correspondence
Antonio Ventosa
ventosa{at}us.es

A Gram-positive, moderately halophilic, spore-forming bacterium, designated strain CG-15^T, was isolated from a soda lake, Lake Chagannor, in the Inner Mongolia Autonomous Region, China. The cells were found to be motile short rods with ellipsoidal, terminal and deforming endospores. Strain CG-15^T, a facultatively anaerobic bacterium, grew at pH 5.8–11.0 (optimally at pH 8.5), at 6–40 °C (optimally at 37 °C) and at salinities of 3–20 % (w/v) total salts (optimally at 7 % w/v). On the basis of the results of 16S rRNA gene sequence analysis, strain CG-15^T was shown to belong to the genus Bacillus (phylum Firmicutes), showing the greatest phylogenetic similarity with respect to Bacillus saliphilus (96.0 %). The DNA G+C content of the novel isolate was found to be 53.8 mol%. The major cellular fatty acids of strain CG-15^T were anteiso-C_{15 : 0}, iso-C_{15 : 0} and anteiso-C_{17 : 0}, and its polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and three different unidentified phospholipids. The analysis of the quinones showed that MK-7 was the major menaquinone. The peptidoglycan type was A1, with meso-diaminopimelic acid as the diagnostic diamino acid. On the basis of the data from this polyphasic study, strain CG-15^T represents a novel species of the genus Bacillus, for which the name Bacillus chagannorensis sp. nov. is proposed. The type strain is CG-15^T (=CCM 7371^T=CECT 7153^T=CGMCC 1.6292^T=DSM 18086^T).

A phase-contrast photomicrograph of cells of strain CG-15^T is available with the online version of this paper.

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