Alteromonas salexigens sp. nov., isolated from coastal seawater.

A Gram-negative, aerobic, short rod-shaped bacterium, designated ASW11-19, was isolated from a coastal seawater sample of the Yellow Sea, PR China. Strain ASW11-19 grew optimally at 37 °C, 3.0-5.0% (w/v) NaCl and pH 7.5. Phylogenetic analysis based on the 16S rRNA gene sequences revealed that strain ASW11-19 belonged to the genus Alteromonas and most closely related to Alteromonas profundi 345S023 and Alteromonas fortis 1 (98.4%, both). The draft genome was 3.55 Mb with 3150 protein-coding genes, 18 contigs, and a DNA G+C content was 44.4%. The digital DNA-DNA hybridization and average nucleotide identity values were below the species-delineating thresholds. The major fatty acids were summed feature 3 (Cω7c/Cω6c), summed feature 8 (Cω7c/Cω6c), and C. The sole respiratory quinone was ubiquinone 8. The polar lipids were phosphatidylethanolamine, phosphatidylglycerol, phospholipid, and two unidentified lipids. Based on these genomic data, phenotypic and chemotaxonomic properties, strain ASW11-19 is considered to represent a novel species of the genus Alteromonas. The name Alteromonas salexigens sp.nov. is proposed for ASW11-19 (=MCCC 1K07239=KCTC 92247).