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An aerobic, Gram-negative-staining, motile, psychrophilic bacterium, designated strain S8-3T, was isolated from alpine soil. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain S8-3T was related to the genus Sphingomonas and had highest 16S rRNA gene sequence similarity with Sphingomonas oligophenolica S213T (98.0 %). 16S RNA gene sequence similarity between strain S8-3T and Sphingomonas paucimobilis ATCC 29837T (the type species of the genus Sphingomonas ) was 93.0 %. Strain S8-3T contained Q-10 as the ubiquinone and C18 : 1ω7c (65.0 %) and C14 : 0 2-OH (13.4 %) as the dominant fatty acids (>10 %). The major polyamines were the triamine sym-homospermidine and spermidine. The polar lipid profile contained sphingoglycolipid, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine and phosphatidylmonomethylethanolamine. The DNA G+C content was 64.1 mol%. Combined data from phenotypic, phylogenetic and DNA–DNA relatedness studies demonstrated that strain S8-3T is a representative of a novel species of the genus Sphingomonas , for which the name Sphingomonas alpina sp. nov. is proposed. The type strain is S8-3T ( = DSM 22537T = LMG 26055T).
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