1887

Abstract

An anaerobic, Gram-stain-positive, spore-forming bacterium, designated DY30321, was isolated from a sample of mixed hydrothermal sulfides collected during cruise DY30 of R/V . Cells of strain DY30321 were rod-shaped with rounded ends, and were not motile. Strain DY30321 grew optimally at pH 8.0, at 30 °C and at a salinity (sea salts) of 30–40 g l. The principal fatty acids of strain DY30321 were C and summed feature 1 (comprising iso H-C/C 3-OH). The predominant polar lipids of strain DY30321 were diphosphatidylglycerol, phosphatidylcholine and phosphatidylethanolamine. No respiratory quinone was detected. The G+C content of the genomic DNA of strain DY30321 was 33.4 mol%. Phylogenetically, strain DY30321 branched within the family , with (misclassified) M1 being its closest phylogenetic relative (94.6 % 16S rRNA gene sequence similarity), followed by (misclassified) DVird3 (92.1 %). These strains showed very low 16S rRNA gene sequence similarity (<84 %) to ATCC 19398, the type species of the genus . On the basis of its phenotypic, phylogenetic and chemotaxonomic characteristics, strain DY30321 (=KCTC 15549=MCCC 1A01532) is considered as the type strain of a novel species of a new genus in the family , for which the name gen. nov., sp. nov. is proposed. gen. nov. is proposed to accommodate as comb. nov. (type species of the genus), and gen. nov. to accommodate as comb. nov. (type species of the genus).

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2016-11-01
2020-08-11
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