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  • Title: Thalassobius maritimus sp. nov., isolated from seawater.
    Author: Park S, Lee MH, Lee JS, Oh TK, Yoon JH.
    Journal: Int J Syst Evol Microbiol; 2012 Jan; 62(Pt 1):8-12. PubMed ID: 21257694.
    Abstract:
    A Gram-stain-negative, aerobic, motile, rod-shaped bacterial strain, GSW-M6(T), was isolated from seawater of Geoje island, Korea, and was subjected to a polyphasic taxonomic study. Strain GSW-M6(T) grew optimally at pH 7.0-8.0, at 30 °C and in the presence of 2% (w/v) NaCl. In the neighbour-joining phylogenetic tree based on 16S rRNA gene sequences, strain GSW-M6(T) clustered with Thalassobius aestuarii, Thalassobius gelatinovorus and Thalassobius mediterraneus. Strain GSW-M6(T) exhibited 96.2-96.9% 16S rRNA gene sequence similarity to the type strains of these three Thalassobius species. Strain GSW-M6(T) contained Q-10 as the predominant ubiquinone and C(18:1)ω7c as the major fatty acid. The polar lipid profiles of strain GSW-M6(T) and the type strains of the three Thalassobius species were similar, with phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine and an unidentified lipid as common major components. The DNA G+C content of strain GSW-M6(T) was 57 mol%. The mean level of DNA-DNA relatedness between strain GSW-M6(T) and the type strain of Thalassobius gelatinovorus was 17%. Differential phenotypic properties, together with the phylogenetic and genetic distinctiveness, enabled strain GSW-M6(T) to be differentiated from recognized species of the genus Thalassobius. On the basis of the data presented, strain GSW-M6(T) is considered to represent a novel species of the genus Thalassobius, for which the name Thalassobius maritimus sp. nov. is proposed. The type strain is GSW-M6(T) (=KCTC 23347(T) =CCUG 60021(T)).
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