Hymenobacter rubripertinctus sp. nov., isolated from Antarctic tundra soil.

A red-pigmented, Gram-reaction-negative, aerobic, non-motile and rod-shaped bacterium, designated NY03-3-30, was isolated from a soil sample collected from Inexpressible Island, Northern Victoria Land of the Antarctic Ross Orogen, and subjected to a polyphasic taxonomic study. Growth occurred at 4-28 °C (optimum 20 °C) and at pH 6.0-9.0 (optimum pH 7.0). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain NY03-3-30 belonged to the genus Hymenobacter in the family Cytophagaceae. 16S rRNA gene sequence similarities between strain NY03-3-30 and the type strains of Hymenobacter species with validly published names ranged from 92.7 to 96.2 %. Strain NY03-3-30 contained summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), iso-C15 : 0, C16 : 0, C16 : 1ω5c, anteiso-C15 : 0 and summed feature 4 (iso-C17 : 1-I and/or anteiso-C17 : 1-B) as major cellular fatty acids, MK-7 as the respiratory quinone and phosphatidylethanolamine as the main polar lipid. The DNA G+C content of strain NY03-3-30 was 59.4 mol%. On the basis of phylogenetic, physiological and chemotaxonomic data, strain NY03-3-30 is considered to represent a novel species of genus Hymenobacter, for which the name Hymenobacter rubripertinctus sp. nov. is proposed. The type strain is NY03-3-30 (=CCTCC AB 2017095=KCTC 62163).