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Sinococcus qinghaiensis gen. nov., sp. nov., a novel member of the order Bacillales from a saline soil in China

Wen-Jun Li^1,, Yu-Qin Zhang^1,2,, Peter Schumann³, Xin-Peng Tian¹, Yue-Qin Zhang², Li-Hua Xu¹ and Cheng-Lin Jiang¹

¹ Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, PR China
² Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
³ DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1b, D-38124 Braunschweig, Germany

Correspondence
Wen-Jun Li
wjli{at}ynu.edu.cn

A Gram-positive, non-spore-forming isolate, designated YIM 70212^T, was isolated from a hypersaline soil sample collected from Qinghai, north-west China. Cells of the isolate were orange-pigmented, motile cocci with multiple flagella. A polyphasic taxonomic investigation was carried out on the isolate. The organism grew at 10–45 °C and pH 7.5–11.0, with optimum growth at 28 °C and pH 8.0–9.5. Strain YIM 70212^T grew optimally in the presence of 10 % NaCl, KCl or MgCl₂.6H₂O and growth was observed in 1–25 % NaCl, KCl or MgCl₂.6H₂O. The peptidoglycan type was A1. Ribose and minor amounts of galactose were detected as the whole-cell sugars. MK-5 was the only menaquinone. The major cellular fatty acids were ai-C_{15 : 0} (52.4 %) and ai-C_{17 : 0} (26.5 %). The DNA G+C content was 47.0 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain YIM 70212^T formed a distinct lineage within the order Bacillales and was most closely related to members of the genus Marinococcus, showing 16S rRNA gene sequence similarity levels of 91.0–91.4 %. Based on the high 16S rRNA gene sequence divergence and differences in phenotypic characteristics, it is proposed that the unknown strain be classified in a novel genus and species with the name Sinococcus qinghaiensis gen. nov., sp. nov.; the type strain of Sinococcus qinghaiensis is YIM 70212^T (=KCTC 3943^T=DSM 17008^T).

A table showing the fatty acid composition of strain YIM 70212^T and related species and TEMs of cells of strain YIM 70212^T are available as supplementary material in IJSEM Online.

These authors contributed equally to this work.

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