sp. nov., a marine bacterium isolated from the brown alga .

A Gram-negative, aerobic, rod-shaped, non-flagellated and motile by gliding bacterium HL2-2, was isolated from the surface of the brown alga in China. The 16S rRNA gene sequence analysis showed that this strain was affiliated with the genus in the family and presented great similarity with the type strain KMM 6491 (97.9 % sequence similarity). The whole genome of strain HL2-2 comprised 3.6 Mbp with a G+C content of 31.9 mol%. The average nucleotide identity between strain HL2-2 and KMM 6491 was 83.7 %. Growth of the isolated strain was observed from 20-40 °C (optimum, 30 °C), at pH ranged from 5.5 to 8.0 (optimum, pH 6.0) and in the presence of 0-5 % (w/v) NaCl (optimum, 0-2 %). The major fatty acids (>10 % of the total) were C, iso-C and the predominant menaquinone was MK-6. The combined phylogenetic, physiological and chemotaxonomic analysis show that the strain HL2-2 represents a novel species belonging to the genus , for which the name sp. nov. is proposed, and which the type strain is HL2-2 (=CICC 24857=KCTC 72882).