sp. nov., isolated from deep-sea sediment of the Pacific Ocean.

A novel Gram-stain-negative, facultatively anaerobic, rod-shaped bacterium, designated as D167-6-1, was isolated from deep-sea sediment collected from the Pacific Ocean. The cells were catalase- and oxidase-positive, and motile by means of peritrichous flagella. Growth occurred at NaCl concentrations ranging from 0 to 19 % (optimum, 2-8 %, w/v), from pH 6 to 11 (optimum, 7-8) and at temperatures between 4 and 45 °C (optimum, 33 °C). Phylogenetic analysis based on 16S rRNA, and gene sequences and its genome sequence revealed that strain D167-6-1 formed a monophyletic branch within the genus and was most closely related to , , , , and (with 98.5, 98.5, 98.4, 98.1, 97.5 and 97.8 % 16S rRNA sequence similarity, respectively). The complete genome size of strain D167-6-1 was 4.49 Mb, with a DNA G+C content of 62.8 mol%. The estimated averagenucleotide identity and DNA-DNA hybridization values between strain D167-6-1 and other closely related species were 77.59-85.35 % and 22.0-30.6 %, respectively. The principal cellular fatty acids (>5 %) were C 7, C, C cyclo 8, summed feature 3 (C 7/C 6) and C cyclo. The polar lipids were identified as diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, an unidentified aminolipid, aminophospholipid and two unidentified phospholipids. The predominant respiratory quinones were Q-9 and Q-8. The combined genotypic and phenotypic data show that strain D167-6-1 represents a novel species of the genus , for which the name sp. nov. is proposed, with the type strain D167-6-1 (=MCCC 1A13316=KCTC 72441).