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Int J Syst Evol Microbiol. 2011 Nov;61(Pt 11):2621-5. doi: 10.1099/ijs.0.028753-0. Epub 2010 Dec 10.

Actinomycetospora rishiriensis sp. nov., isolated from a lichen.

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Division of Applied Biological Sciences, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Takeda-4, Kofu 400-8511, Japan.


An actinomycete, strain RI109-Li102(T), was isolated from a lichen sample obtained from Rishiri Island in Japan. Cells of strain RI109-Li102(T) were Gram-positive, aerobic and non-motile and formed bud-like spore chains. The isolate grew with 0-3 % (w/v) NaCl, at pH 5-9 and at 10-30 °C (optimum 30 °C). The whole-cell hydrolysate contained meso-diaminopimelic acid, arabinose and galactose. The predominant menaquinone was MK-8(H(4)) and the diagnostic phospholipids were phosphatidylethanolamine, phosphatidylcholine, phosphatidylinositol and diphosphatidylglycerol. The major cellular fatty acids were iso-C(16 : 0) and iso-C(16 : 1) H. Comparative 16S rRNA gene sequence analysis revealed that strain RI109-Li102(T) was most closely related to Actinomycetospora corticicola 014-5(T) (99.0 % rRNA gene sequence similarity) and Actinomycetospora chiangmaiensis YIM 0006(T) (98.4 %). However, DNA-DNA hybridization assays, as well as physiological and biochemical analyses, showed that strain RI109-Li102(T) could be differentiated from its closest phylogenetic relatives. It is proposed that strain RI109-Li102(T) ( = NBRC 106356(T) = KCTC 19782(T)) be classified as the type strain of a novel species, with the name Actinomycetospora rishiriensis sp. nov.

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