Flavipsychrobacter stenotrophus gen. nov., sp. nov., a novel member of the phylum Bacteroidetes isolated from a glacier

International Journal of Systematic and Evolutionary Microbiology
Qing LiuYuhua Xin

Abstract

A Gram-stain-negative strain, designated RB1R16T, was isolated from ice collected from the ice tongue surface of the Renlongba glacier in Tibet. Strain RB1R16T was catalase-negative, oxidase-negative and grew at 10-22 °C, pH 6.0-8.0 and in the presence of 0-0.5 % NaCl. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the strain RB1R16T belonged to Chitinophagaceae and formed an independent linkage. The highest level of 16S rRNA gene sequence similarities were found to Lacibacter cauensis CGMCC 1.7271T (90.3 %), Flavihumibacter cheonanensis WS16T (90.1 %) and Flavihumibacter solisilvae 3-3T (90.1 %). The major fatty acids were iso-C15 : 1 G, iso-C15 : 0, summed feature 4 (comprising iso-C17 : 1 I and/or anteiso-C17 : 1 B) and iso-C17 : 0 3OH. The polar lipids contained phosphatidylethanolamine, one unidentified aminolipid and four unidentified lipids. The quinone system contained menaquinone MK-7 as the only component. The DNA G+C content was 43.1 mol%. On the basis of a polyphasic approach, a novel species of a new genus Flavipsychrobacter stenotrophus gen. nov., sp. nov. within the family Chitinophagaceae is proposed, with RB1R16T (=CGMCC 1.16126T=NBRC 113112T) as the type strain.

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