Abstract
A Gram-stain-negative, non-motile bacterial strain, designated SW124T, was isolated from a deep-sea sediment sample collected from the Indian Ocean. SW124T 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 SW124T 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-C15 : 0, iso-C17 : 0 3-OH and summed feature 3 (comprising C16 : 1ω7c and/or C16 : 1ω6c). SW124T contained phosphatidylethanolamine (PE) as the major polar lipid. The genomic DNA G+C content of SW124T was 41.7 mol%. On the basis of its phenotypic characteristics and phylogenetic data, we propose that strain SW124T (=CGMCC 1.16171T=KCTC 82235T) represents a novel species of a novel genus, with the name Pararhodonellum marinum gen. nov., sp. nov.
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