Antarcticimonas flava gen. nov., sp. nov., isolated from Antarctic coastal seawater
Yang, S.J., Inha University, Incheon, Republic of Korea | Oh, H.M., Inha University, Incheon, Republic of Korea | Chung, S.Y., Korean Minjok Leadership Academy, Hoengseong, Republic of Korea | Cho, J.C., Inha University, Incheon, Republic of Korea
A marine bacterium, designated IMCC3175∨T, was isolated from a seawater sample collected off the Antarctic coast. The strain was Gram-negative, obligately aerobic, carotenoid pigment-containing, and rod-shaped bacterium that divided by binary fission. As determined by 16S rRNA gene sequence comparisons, the most closely related genera were Formosa (92.9~93.3%), Bizionia (91.6~93.2%), Gaetbulibacter (91.5~92.8%), Sediminibacter (92.7%), Yeosuana (92.6%), Subsaximicrobium (92.1~92.2%), and Gillisia (89.5~92.2%). Phylogenese analysis based on 16S rRNA gene sequences showed that the strain formed a monophyletic clade together with the genera Sediminibacter and Subsaximicrobium but represented an independent phyletic line in this clade of the family Flavobacteriaceae. The DNA G+C content of the strain was 37.3 mol%. The major respiratory quinone was MK-6 and the predominant cellular fatty acids were C∧16:1 ω7c and/or iso-C∧15:0 2-OH (12.8%), anteiso-C∧15:0 (9.4%), and iso-C∧16:1 (9.4%). Low 16S rRNA gene sequence similarity, formation of a distinct phylogenetic branch, and several phenotypic characteristics, including a narrow range of temperature and salinity for growth, differentiated strain IMCC3175∨T from other related genera in the family Flavobacteriaceae. Therefore the name Antarcticimonas flava gen. nov., sp. nov. is proposed, with strain IMCC3175∨T (=KCCM 42713∨T =NBRC 103398∨T) as the type strain.
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