Antarcticibacterium flavum gen. nov., sp. nov., isolated from marine sediment

A Gram-stain-negative, strictly aerobic, yellow-pigmented, non-gliding, oval to rod-shaped bacterial strain, designated JB01H24T, belonging to the family Flavobacteriaceae , was isolated from marine surface sediment collected from the Ross Sea, Antarctica. Strain JB01H24T grew at 4–40 °C (optimum 25–30 °C), pH 7.0–9.0 (optimum 7.5–8.0), and in the presence of 0–8 % NaCl (optimum 3 %, w/v). Phylogenetic analysis based on 16S rRNA gene sequences showed that strain JB01H24T formed an independent linkage within the family Flavobacteriaceae and was closely related with the genus Gillisia . Strain JB01H24T exhibited 16S rRNA gene sequence similarities of 95.3–91.5 % and 94.9–94.0 % to the type strains of the genera Gillisia and Salinimicrobium , respectively. The major fatty acids (>5 %) were iso-C15 : 0, summed feature 3 (C16 : 1 ω6c and/or C16 : 1 ω7c), anteiso-C15 : 0, iso-C15 : 1 G and summed feature 9 (iso-C17 : 1 ω9c and/or 10-methyl C16 : 0). The major polar lipids were phosphatidylethanolamine, seven unidentified lipids, two unidentified aminolipids and an unidentified aminophospholipid. Strain JB01H24T contained menaquinone-6 as the only ubiquinone. The DNA G+C content was 42.4 mol%. On the basis of phylogenetic, physiological and chemotaxonomic properties, strain JB01H24T is considered to represent a novel species of a new genus within the family Flavobacteriaceae , for which the name Antarcticibacterium flavum gen. nov., sp. nov. is proposed. The type strain of Antarcticibacterium flavum is JB01H24T (=GDMCC 1.1229T=KCTC 52984T).