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Jiangella gansuensis gen. nov., sp. nov., a novel actinomycete from a desert soil in north-west China

Lei Song^1,2,3,, Wen-Jun Li^2,, Qi-Lan Wang¹, Guo-Zhong Chen², Yao-Sheng Zhang¹ and Li-Hua Xu²

¹ Northwest Institute of Plateau Biology, CAS, Xining, Qinghai, 810008, People's Republic of China
² The Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan, 650091, People's Republic of China
³ Graduate School of the Chinese Academy of Sciences, Beijing, 100039, People's Republic of China

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

A novel actinomycete strain, designated YIM 002^T, was isolated from a desert soil sample in Gansu Province, north-west China. This actinomycete isolate formed well-differentiated aerial and substrate mycelia. In the early stages of growth, the substrate mycelia fragmented into short or elongated rods. Chemotaxonomically, it contained LL-2,6-diaminopimelic acid in the cell wall. The cell-wall sugars contained ribose and glucose. Phospholipids present were phosphatidylinositol mannosides, phosphatidylinositol and diphosphatidylglycerol. MK-9(H₄) was the predominant menaquinone. The major fatty acids were anteiso C_{15 : 0} (35·92 %), anteiso C_{17 : 0} (15·84 %), iso C_{15 : 0} (10·40 %), iso C_{16 : 0} (7·07 %) and C_{17 : 1}8c (9·37 %). The G+C content of the DNA was 70 mol%. Phylogenetic analysis and signature nucleotide data based on 16S rRNA gene sequences showed that strain YIM 002^T is distinct from all recognized genera of the family Nocardioidaceae in the suborder Propionibacterineae. On the basis of the phenotypic and genotypic characteristics, it is proposed that isolate YIM 002^T be classified as a novel species in a new genus, Jiangella gansuensis gen. nov., sp. nov. The type strain is YIM 002^T (=DSM 44835^T=CCTCC AA 204001^T=KCTC 19044^T).

Published online ahead of print on 29 October 2004 as DOI 10.1099/ijs.0.63353-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 002^T is AY631071.

Scanning electron micrographs of substrate and aerial mycelia of strain YIM 002^T are available as supplementary material in IJSEM Online.

These authors contributed equally to this work.

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