1887

Abstract

A novel actinomycete, designated strain KC 198, was isolated from rare earth mine. The results of analysis of the 16S rRNA gene sequence indicated that KC 198 was most closely related to YIM 75728 (98.4 %). Aerial hyphae differentiated into long, straight chains of cylindrical spores. Growth was observed at 10–45 °C (optimum 28 °C), with 0–10 % (w/v) NaCl (optimum, in the absence of NaCl) and at pH 6.0–8.0 (optimum pH 7.0). KC 198 possessed MK-9(H) as the predominant respiratory quinone and a minor amount of MK-10(H). Polar lipids detected were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylinositol and phosphatidylinositol mannoside. Three unidentified lipids were also detected. The main cellular fatty acids were iso-C (30.9 %), iso-CH (22.9 %) and iso-C (14.8 %). The genomic DNA G+C content was 66.8 mol%. On the basis of the phenotypic and genotypic characteristics, we propose that strain KC 198 represents a novel species of the genus . The name sp. nov. is, therefore, proposed for the novel species with the type strain KC 198 (=CCTCC AA 2015043=KCTC 39718). The description of the genus has also been emended.

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2018-04-01
2024-03-28
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