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  • Title: Amphiplicatus metriothermophilus gen. nov., sp. nov., a thermotolerant alphaproteobacterium isolated from a hot spring.
    Author: Zhen-Li Z, Xin-Qi Z, Nan W, Wen-Wu Z, Xu-Fen Z, Yi C, Min W.
    Journal: Int J Syst Evol Microbiol; 2014 Aug; 64(Pt 8):2805-2811. PubMed ID: 24867176.
    Abstract:
    A thermotolerant, Gram-strain-negative, non-spore-forming and strictly aerobic bacterium, designated GU51(T), was isolated from Guhai hot spring in Jimsar county, Xinjiang province, north-west China. Each cell of strain GU51(T) consisted of an oval body and two symmetrical long (3-6 µm) prosthecae. The strain moved by polar flagellum. Oxidase and catalase were produced. Strain GU51(T) grew within the ranges of 37-65 °C (optimum 48-50 °C), 0.5-7.5% (w/v) NaCl (optimum 2-3%) and pH 6.0-9.0 (optimum pH 7.5). The major respiratory quinone detected was ubiquinone 10 (U-10) and the genomic DNA G+C content was 66.7±0.4 mol%. Major fatty acids (>5%) were C(16 : 0), C(18 : 1)ω7c and 11-methyl C(18 : 1)ω7c. The polar lipids consisted of diphosphatidylglycerol, five glycolipids, phosphatidylglycerol and an unknown phospholipid. Phylogenetic analysis showed the closest relatives of strain GU51(T) were members of the genus Parvularcula with 92.3% 16S rRNA gene sequence similarity. On the basis of this polyphasic taxonomic characterization, it is suggested that strain GU51(T) represents a novel species of a new genus in the family 'Parvularculaceae', for which the name Amphiplicatus metriothermophilus gen. nov., sp. nov. is proposed. The type strain of the type species is GU51(T) ( = CGMCC 1.12710(T) = JCM 19779(T)).
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