Rubritalea profundi sp. nov., isolated from deep-seawater and emended description of the genus Rubritalea in the phylum Verrucomicrobia
2018
A Gram-stain-negative, short-rod, facultatively anaerobic, non-motile and red-pigmented bacterium, designated SAORIC-165T, was isolated from a deep-seawater sample collected from the Pacific Ocean. The 16S rRNA gene sequence analysis showed that strain SAORIC-165T was most closely related to
Rubritalea marina
Pol012T (95.7 % sequence similarity) and formed a robust phylogenetic clade with other species of the genus
Rubritalea
in the phylum
Verrucomicrobia
. Optimal growth of strain SAORIC-165T was observed at 10 °C, pH 7.0 and in the presence of 2.0–3.5 % (w/v) NaCl. The DNA G+C content of strain SAORIC-165T was 50.7 mol% and MK-9 was the predominant isoprenoid quinone. The major cellular fatty acids were summed feature 3 (C16 : 1
ω7c and/or C16 : 1
ω6c), iso-C14 : 0, anteiso-C15 : 0, C16 : 0 and C14 : 0. The major polar lipids constituted phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and unidentified phospholipids and aminolipids. On the basis of the taxonomic data obtained in this study, it was concluded that strain SAORIC-165T represented a novel species of the genus
Rubritalea
, for which the name Rubritalea profundi sp. nov. is proposed. The type strain of
Rubritalea profundi
is SAORIC-165T (=NBRC 110691T=KCTC 52460T).
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