A Gram-negative, non-motile and rod-shaped bacterial strain, designated RA2-3
T, was isolated from a sea squirt (
Halocynthia roretzi) collected from the South Sea, Korea, and its taxonomic position was investigated by using a polyphasic approach. Strain RA2-3
T was observed to grow optimally at 25 °C, at pH 7.0–7.5 and in the presence of 2 % (w/v) NaCl. Strain RA2-3
T exhibited the highest 16S rRNA gene sequence similarity values to the type strains of
Litoreibacter meonggei (95.7 %),
Planktotalea frisia (95.6 %),
Thalassobius gelatinovorus (95.5 %) and
Pelagicola litoralis (95.4 %). A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences revealed that strain RA2-3
T clustered with the type strains of
Planktotalea frisia,
Pelagicola litoralis,
Pacificibacter maritimus and
Roseovarius marinus. Strain RA2-3
T was found to contain Q-10 as the predominant ubiquinone and C
18:1 ω7
c as the major fatty acid. The major polar lipids detected in strain RA2-3
T were phosphatidylcholine, phosphatidylglycerol, one unidentified aminolipid and one unidentified lipid. The DNA G+C content of strain RA2-3
T was 52.9 mol%. On the basis of the phylogenetic, chemotaxonomic and phenotypic properties, strain RA2-3
T is considered to represent a new genus and species within the family
Rhodobacteraceae, for which the name
Halocynthiibacter namhaensis gen. nov., sp. nov. is proposed. The type strain of
H. namhaensis is RA2-3
T (=KCTC 32362
T=NBRC 109999
T).
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