Summary: | An aerobic, Gram-negative bacterial isolate, strain DX5-10(T), was isolated from coastal sediment of the East China Sea. The taxonomy of strain DX5-10T was studied by phenotypic and phylogenetic methods. Strain DX5-10(T) was motile, formed faint-yellowish colonies and was positive for catalase reaction and weakly positive for oxidase reaction. The nearly complete 16S rRNA gene of strain DX5-10(T) was obtained and sequence analysis indicated that strain DX5-10(T) represented an independent lineage within the Roseobacter clade of Alphaproteobacteria. Strain DX5-10(T) was phylogenetically related to members of the genera Roseobacter, Loktanella, Roseisalinus, Silicibacter, Antarctobacter, Suffitobacter, Salipiger, Ruegeria and Roseivivax, and the sequence identities among them were less than 95.0%. The predominant respiratory ubiquinone of strain DX5-10(T) was Q-10 and the DNA G+C content of strain DX5-10(T) was 63.3 mol%. Therefore, strain DX5-10(T) represents a novel species of a novel genus, for which the name Yangia pacifica gen. nov., sp. nov. is proposed, with the type strain DX5-10T (=CGMCC 1.3455(T) = JCM 12573(T)).
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