sp. nov., an SUF-system-containing bacterium from Antarctic coastal sediment.

A Gram-stain-negative, heterotrophic, aerobic, non-motile, rod-shaped bacterial strain (GW1-59) belonging to the genus was isolated from coastal sediment collected from the Chinese Great Wall Station, Antarctica. The strain was identified using a polyphasic taxonomic approach. The strain grew well on Reasoner's 2A media and could grow in the presence of 0-4 % (w/v) NaCl (optimum, 1 %), at pH 9.0-11.0 and at 15-37 °C (optimum, 30 °C). Strain GW1-59 possessed ubiquinone-8 as the sole respiratory quinone. The major phospholipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The major fatty acids were summed feature 9 (10-methyl C and/or iso-C 9), iso-C, iso-C, iso-C, C and iso-C 3-OH. DNA-DNA relatedness with Ko07, the nearest phylogenetic relative (98.5 % 16S rRNA gene sequence similarity) was 23.4 % (21.1-25.9 %). The average nucleotide identity value between strain GW1-59 and Ko07 was 80.1 %. The physiological and biochemical results and low level of DNA-DNA relatedness suggested the phenotypic and genotypic differentiation of strain GW1-59 from other species. On the basis of phenotypic, phylogenetic and genotypic data, a novel species, sp. nov., is proposed. The type strain is GW1-59 (=CCTCC AB 2019390=KCTC 72831).