Pararhodonellum marinum gen. nov., sp. nov., isolated from deep-sea sediment

A Gram-stain-negative, non-motile bacterial strain, designated SW124^T, was isolated from a deep-sea sediment sample collected from the Indian Ocean. SW124^T was aerobic and catalase-positive. The strain grew at 4-40 °C (optimum, 30 °C), at pH 5.0-8.6 (optimum, pH 7.0) and in the presence of 0.5-9.5 % (w/v) NaCl (optimum, 3.0%). The results of comparative analyses of the 16S rRNA gene sequence indicated that SW124^T was grouped in the vicinity of the genus Rhodonellum in the family Cyclobacteriaceae. The quinone system contained menaquinone MK-7. The predominant cellular fatty acids were iso-C_15 : 0, iso-C_17 : 0 3-OH and summed feature 3 (comprising C_16 : 1ω7c and/or C_16 : 1ω6c). SW124^T contained phosphatidylethanolamine (PE) as the major polar lipid. The genomic DNA G+C content of SW124^T was 41.7 mol%. On the basis of its phenotypic characteristics and phylogenetic data, we propose that strain SW124^T (=CGMCC 1.16171^T=KCTC 82235^T) represents a novel species of a novel genus, with the name Pararhodonellum marinum gen. nov., sp. nov.