A Gram-positive, halophilic bacterium was isolated from a sediment sample from Ai-Ding salt lake in China. The isolate, designated strain 17-5, grew at salinities of 8–33 % (w/v) NaCl (optimally at 12 %, w/v). The genomic DNA G+C content of strain 17-5 was 48.1 mol%. The predominant isoprenoid quinone was MK-7(H) and the cell-wall peptidoglycan contained -diaminopimelic acid. The major polar lipids were diphosphatidylglycerol and an unidentified glycolipid. The major cellular fatty acids were anteiso-C, anteiso-C, iso-C and C. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain 17-5 was a member of the genus , being most closely related to JCM 14087 (96.0 % sequence similarity) and DSM 16461 (95.6 %). The levels of 16S rRNA gene sequence similarity with respect to other species were less than 91.7 %. Comparative analysis of the 16S rRNA gene sequence data, chemotaxonomy and phenotypic features of the novel isolate and related species of indicated that strain 17-5 represents a novel species within the genus , for which the name sp. nov. is proposed. The type strain is 17-5 (=CGMCC 1.3227=DSM 18341).


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vol. , part 12, pp. 2828 - 2832

Photomicrographs of cells of strain 17-5 ( sp. nov.). [PDF](212 KB)


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