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Ruania albidiflava gen. nov., sp. nov., a novel member of the suborder Micrococcineae

Qiang Gu^1,2, Mariola Paciak³, Hongli Luo¹, Andrzej Gamian³, Zhiheng Liu¹ and Ying Huang¹

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
³ Laboratory of Medical Microbiology, Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland

Correspondence
Ying Huang
huangy{at}im.ac.cn

A Gram-positive, coccoid, non-spore-forming bacterium, designated strain 3-6^T, was isolated from farmland soil and subjected to a polyphasic taxonomic analysis. Comparative analysis of the 16S rRNA gene sequence revealed that the strain represented a novel member of the suborder Micrococcineae. Its nearest phylogenetic neighbour was the type strain of Georgenia muralis (94.2 % 16S rRNA gene sequence similarity). Chemotaxonomic characteristics of strain 3-6^T were as follows: the major menaquinone was MK-8(H₄); the polar lipids consisted mainly of diphosphatidylglycerol, phosphatidylglycerol and one unknown glycolipid; the predominant fatty acids were anteiso-C_{15 : 0}, anteiso-C_{17 : 0} and iso-C_{16 : 0}; mycolic acids were absent. A new murein type, L-lys–gly–L-glu–L-Glu (A4), was found in the peptidoglycan of the cell wall. The DNA G+C content was 69.8 mol%. On the basis of morphological, chemotaxonomic and phylogenetic characteristics, it is suggested that strain 3-6^T represents a novel species of a new genus within the suborder Micrococcineae, for which the name Ruania albidiflava gen. nov., sp. nov. is proposed. The type strain of Ruania albidiflava is 3-6^T (=CGMCC 4.3142^T=DSM 18029^T=JCM 13910^T=PCM 2644^T).

A scanning electron micrograph of cells of strain 3-6^T, a maximum-parsimony phylogenetic tree and tables detailing the physiological and biochemical properties and cellular fatty acid components of strain 3-6^T are available as supplementary material in IJSEM Online.

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