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  • Title: Undibacterium aquatile sp. nov., isolated from a waterfall.
    Author: Du J, Akter S, Won K, Singh H, Shik Yin C, Kook M, Yi TH.
    Journal: Int J Syst Evol Microbiol; 2015 Nov; 65(11):4128-4133. PubMed ID: 26303040.
    Abstract:
    A Gram-stain-negative, aerobic, motile and rod-shaped strain, THG-DN7.3T, was isolated from a waterfall. Strain THG-DN7.3T grew well at 18-28 °C and at pH 6.0-7.5 on Reasoner's 2A agar. Based on 16S rRNA gene sequence comparisons, strain THG-DN7.3T was most closely related to Undibacterium jejuense JS4-4T (97.3 % 16S rRNA gene sequence similarity) and Undibacterium seohonense SHS5-24T (96.5 %). The G+C content of the genomic DNA was 57.4 mol%. The mean DNA-DNA relatedness of strain THG-DN7.3T with U. jejuense KACC 12607T was 40 ± 1 % (reciprocal 50 ± 2.1 %). The major cellular fatty acids of strain THG-DN7.3T were summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) (47.4 %), C16 : 0 (30.4 %), summed feature 8 (C18 : 1ω6c and/or C18 : 1ω7c) (6.8 %) and C12 : 0 (6.2 %). The predominant isoprenoid quinone was ubiquinone-8. The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. The results of the DNA-DNA hybridization and genotypic analysis, in combination with chemotaxonomic and physiological data, demonstrated that strain THG-DN7.3T represents a novel species of the genus Undibacterium, for which the name Undibacterium aquatile sp. nov. is proposed. The type strain is THG-DN7.3T ( = KCTC 42243T = CCTCC AB 2015119T).
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