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Actinomadura alba sp. nov., isolated from soil in Yunnan, China

Yong-Xia Wang^1,, Xiao-Yang Zhi^1,, Hua-Hong Chen¹, Yu-Qin Zhang^1,2, Shu-Kun Tang¹, Cheng-Lin Jiang¹, Li-Hua Xu¹ and Wen-Jun Li¹

¹ Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, People's Republic of China
² Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China

Correspondence
Wen-Jun Li
wjli{at}ynu.edu.cn
Li-Hua Xu
lihxu{at}ynu.edu.cn

A novel actinomycete, strain YIM 45681^T, which was isolated from soil in a suburb of Kunming, Yunnan Province, China, was subjected to phenotypic and genotypic characterization. The micro-organism, which produces short spore chains arranged in spirals on the aerial mycelium, was shown to have meso-diaminopimelic acid in the cell wall. The sugars present in whole-cell hydrolysates were ribose, xylose, galactose, madurose and glucose. The predominant menaquinones were MK-9(H₄), MK-9(H₆) and MK-9(H₂). The phospholipids included diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannoside. The major fatty acids were iso-C_{16 : 1} H, C_{17 : 1}8c, 10-methyl C_{17 : 0} and C_{16 : 0}. A comparative analysis of 16S rRNA gene sequences indicated that the organism formed a distinct clade within the evolutionary radiation of the family Thermomonosporaceae, and that it was closely associated with members of the genus Actinomadura. A broad range of phenotypic and genetic data supported the suggestion that this organism represents a novel species of the genus Actinomadura, for which the name Actinomadura alba sp. nov. is proposed, with YIM 45681^T (=DSM 45045^T =CCTCC AA206005^T) as the type strain.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 45681^T is DQ985164.

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