Yangia pacifica gen. nov., sp. nov., a novel member of the Roseobacter clade from coastal sediment of the East China Sea

Abstract

An aerobic, Gram-negative bacterial isolate, strain DX5-10T, was isolated from coastal sediment of the East China Sea. The taxonomy of strain DX5-10Twas studied by phenotypic and phylogenetic methods. Strain DX5-10Twas 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 DX5-10Twas obtained and sequence analysis indicated that strain DX5-10Trepresented an independent lineage within theRoseobacterclade ofAlphaproteobacteria. Strain DX5-10Twas phylogenetically related to members of the generaRoseobacter,Loktanella,Roseisalinus,Silicibacter,Antarctobacter,Sulfitobacter,Salipiger,RuegeriaandRoseivivax, and the sequence identities among them were less than 95·0 %. The predominant respiratory ubiquinone of strain DX5-10Twas Q-10 and the DNA G+C content of strain DX5-10Twas 63·3 mol%. Therefore, strain DX5-10Trepresents a novel species of a novel genus, for which the nameYangia pacificagen. nov., sp. nov. is proposed, with the type strain DX5-10T(=CGMCC 1.3455T=JCM 12573T).