Altererythrobacter rubellus sp. nov., a marine alphaproteobacterium isolated from seawater
2019
Yoon, Jaewoo | Ryu, Jaewon
The phylogenetic and taxonomic status of an alphaproteobacterium isolated from seawater, collected in the Republic of Korea, was elucidated based on a polyphasic method. Strain KMU-45ᵀ was Gram-stain-negative, strictly aerobic, rod-shaped, non-motile and chemoheterotrophic. Phylogenetic investigation based on the 16S rRNA gene sequence demonstrated that the novel marine isolate belongs to the family Erythrobacteraceae, of the class Alphaproteobacteria, and that it possessed the highest (98.7%) sequence similarity with Altererythrobacter ishigakiensis ATCC BAA-2084ᵀ. DNA–DNA hybridization values between strains KMU-45ᵀ and A. ishigakiensis KCTC 42446ᵀ were 31.4% ± 8.4%. The major isoprenoid quinone of the novel isolate was ubiquinone-10 (Q-10) and the major (>10%) cellular fatty acids were C17:1 ω8c, C17:1 ω6c and C18:1 ω7c. The genomic DNA G + C content of strain KMU-45ᵀ was 57.7 mol%. The polar lipid profile of the strain KMU-45ᵀ comprised phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylcholine, an unidentified phospholipid and an unidentified lipid. From the polyphasic taxonomic results in this study, the bacterium can be considered to represent a new species of the genus Altererythrobacter, for which the name Altererythrobacter rubellus sp. nov. is proposed. The type species is A. rubellus sp. nov., with the type strain KMU-45ᵀ (= KCCM 90270ᵀ = NBRC 112769ᵀ).
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