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

¹ State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Zhong-Guan-Cun, Haidian, Beijing 100080, China
² State Key Laboratory for Marine Environmental Sciences, Xiamen University, Xiamen, 361005, China

Correspondence
Shuang-Jiang Liu
shuangjiang{at}hotmail.com

An aerobic, Gram-negative bacterial isolate, strain DX5-10^T, was isolated from coastal sediment of the East China Sea. The taxonomy of strain DX5-10^T 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, Sulfitobacter, 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 DX5-10^T (=CGMCC 1.3455^T=JCM 12573^T).

Published online ahead of print on 28 October 2005 as DOI 10.1099/ijs.0.64013-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Yangia pacifica DX5-10^T is AJ877265.

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