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Int J Syst Evol Microbiol 59 (2009), 2297-2301; DOI  10.1099/ijs.0.004366-0
© 2009 International Union of Microbiological Societies

Zhangella mobilis gen. nov., sp. nov., a new member of the family Hyphomicrobiaceae isolated from coastal seawater

Hai-Ying Xu1,2,{dagger}, Li-Ping Chen1,2,{dagger}, Song-Zhe Fu1,2, Hong-Xia Fan1,2, Yu-Guang Zhou1, Shuang-Jiang Liu1 and Zhi-Pei Liu1

1 State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China

Correspondence
Zhi-Pei Liu
liuzhp{at}sun.im.ac.cn

A Gram-negative, pale-yellow, non-spore-forming bacterium, motile with single polar flagella, strain E6T, was isolated from coastal seawater collected from Tianjin, China, and its taxonomic position was investigated using a polyphasic approach. Strain E6T requires NaCl for growth and grows optimally at pH 8.2 and 36 °C and in the presence of 2.0 % (w/v) NaCl. It is positive for catalase and oxidase, and reduces nitrate to nitrite. The major fatty acids (>10 %) are C18 : 1{omega}7c (64.71 %) and 11-methyl C18 : 1{omega}7c (12.38 %), the ubiquinone system is Q-10 and the DNA G+C content is 53.1 mol%. Phylogenetic analyses based on 16S rRNA gene sequences demonstrated that strain E6T represented a new lineage in the Alphaproteobacteria and is related to genera Cucumibacter, Devosia, Ochrobactrum and Ahrensia. Strain E6T shows highest 16S rRNA gene sequence similarity (93.3 %) to Cucumibacter marinus CL-GR60T and less than 92.2 % similarity to other relatives. It can be differentiated from its closest phylogenetic neighbours on the basis of several phenotypic features, including nitrate reduction, assimilation of D-glucose, L-arabinose, D-mannose, mannitol and maltose and major fatty acid composition. A polyphasic analysis supported the conclusion that strain E6T represents a novel genus and species of the family Hyphomicrobiaceae, for which the name Zhangella mobilis gen. nov., sp. nov. is proposed. The type strain of Zhangella mobilis is E6T (=CGMCC 1.7002T =JCM 15144T).

{dagger}These authors contributed equally to this paper.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain E6T is EU255260.

A transmission electron micrograph and a table of fatty acid profiles are available as supplementary material with the online version of this paper.






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