Alteromonas profundi sp. nov., isolated from the Indian Ocean

A Gram-staining-negative bacterium, designated 345S023 T , was isolated from a sea water sample from the Indian Ocean. The results of 16S rRNA gene sequence analysis revealed that 345S023 T represents a member of the genus Alteromonas , with closely related type strains Alteromonas fortis 1 T (98.7 %), Alteromonas hispanica F-32 T (98.6 %) and Alteromonas genovensis LMG 24078 T (98.6 %). Up-to-date bacterial core gene set analysis revealed that 345S023 T formed a phyletic lineage with Alteromonas australica H 17 T . The case for 345S023 T representing a novel species was supported by genomic results. Pairwise in silico DNA–DNA hybridization and average nucleotide identity values were much lower than the proposed and generally accepted species boundaries. Strain 345S023 T contains ubiquinone-8 (Q-8) as the sole isoprenoid quinone, summed featured 3 (C 16 : 1 ω7 c and/or C 16 : 1 ω6 c ), C 16 : 0 and C 18 : 1 ω7 c as the dominant cellular fatty acids (>10 %), and phosphatidylglycerol and phosphatidylethanolamine as the major polar lipids. The genome of strain 345S023 T consisted of a 4.4 Mb chromosome with a DNA G+C content of 44.4 %. On the basis of these genomic, chemotaxonomic and phenotypic characteristics, we propose a novel species: Alteromonas profundi sp. nov. The type strain is 345S023 T (=JCM 33893 T =MCCC 1K04570 T ).