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Amycolatopsis xylanica sp. nov., an actinomycete isolated from soil in Qinghai, China

Chinese Academy of Medical Sciences & Peking Union Medical College

¹ E-mail: zhyuqin{at}126.com

The taxonomic status of an actinomycete (CPCC 202699T) isolated from soil in Qinghai province of China was established based on a polyphasic investigation. The isolate contained meso-diaminopimelic acid in its peptidoglycan, arabinose and galactose as diagnostic sugars in whole-cell hydrolysates, a phospholipids pattern mainly consisting of phosphatidylethanolamine (PE), phosphatidylmethylethanolamine (PME) and phosphatidylcholine (PC), MK-9(H4) being the predominant menaquinone, and iso-C16:0 (18.8%), iso-C15:0 (18.1%), iso-C14:0 (14.2%), C16:1 cis9 (10.9%), and C17:1 cis9 (10.3%) as the major fatty acids. On the phylogenetic tree based on the 16S rRNA gene sequences analysis, the new isolate formed a separate branch within the genus Amycolatopsis. However, the organism showed low similarities (<97.0%) of 16S rRNA gene with all of the validly described species. Combined with the genotypic and phenotypic difference from the closest phylogenetic neighbours of the studied strain, a novel species, Amycolatopsis xylanica sp. nov., is proposed. The type strain is CPCC 202699T(=DSM 45285T=KCTC 19581T=CCM 7627T).