Neptunomonas marina sp. nov., isolated from seawater
2019
Chen, Wen-Ming | Hsieh, Tsai-Ying | Sheu, Shih-Yi
Strain HPM-16ᵀ, isolated from seawater, was characterized using a polyphasic taxonomy approach. Phylogenetic analyses based on 16S rRNA gene sequences and coding sequences of an up-to-date bacterial core gene set (92 protein clusters) indicated that strain HPM-16ᵀ formed a phylogenetic lineage in the genus Neptunomonas. Strain HPM-16ᵀ was most closely related to Neptunomonas concharum LHW37ᵀ with 16S rRNA gene sequence similarity of 96.7%. Cells were Gram-stain negative, facultatively anaerobic, motile by means of a single polar flagellum, rod-shaped and formed white colonies. Optimal growth occurred at 30–35 °C, pH 6.5–8, and in the presence of 2–5% NaCl. C₁₈:₁ω7c and summed feature 3 (C₁₆:₁ω7c and/or C₁₆:₁ω6c) were the predominant fatty acids. The only isoprenoid quinone was Q-8. The polar lipid profile revealed the presence of phosphatidylethanolamine, phosphatidylglycerol and several uncharacterized lipids. The major polyamines were putrescine and spermidine. The draft genome was approximately 3.68 Mb in size with a G + C content of 50.5 mol%. Differential phenotypic properties, together with the phylogenetic inference, demonstrate that strain HPM-16ᵀ should be classified as a novel species of the genus Neptunomonas, for which the name Neptunomonas marina sp. nov. is presented. The type strain is HPM-16ᵀ (= BCRC 80980ᵀ = LMG 29560ᵀ = KCTC 52235ᵀ).
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