1887

Abstract

A Gram-stain-negative, non-motile, strictly aerobic, coccus-shaped bacterium, designated S14-83, was isolated from a soil sample collected from the South Shetland Islands of Antarctica. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the strain is a novel member of the genus , with as its closest relative (96.1 % similarity). The DNA G+C content of the strain was 61.1 mol% and the major respiratory quinone was MK-8. Major cellular fatty acids were summed feature 3 (Cω7/Cω6) and C. As well as containing glycophospholipid, aminophospholipids and glycolipid as major polar lipids, there were also some unknown polar lipids. The diagnostic diamino acid in the cell-wall peptidoglycan was ornithine, corroborating the assignment of the strain to the genus . Strain S14-83 was shown to be extremely resistant to gamma radiation (>10 kGy) and UV light (460 Jm). On the basis of phylogenetic, chemotaxonomic and phenotypic data presented here, strain S14-83 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is S14-83 (=CCTCC AB 2015449= DSM 105285 ).

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2019-12-01
2021-10-18
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