<p>A Gram-stain-negative, ovoid to rod-shaped, aerobic, non-motile bacterial strain, designated YIM 73028<sup>T</sup>, was isolated from a sediment sample collected from a hot spring in Tibet, China. Phylogenetic analysis (based on the 16S rRNA gene sequences) indicated that strain YIM 73028<sup>T</sup>&#xa0;belongs to the genus <i>Tabrizicola</i> and showed the highest sequence similarity to the type strain of <i>Tabrizicola aquatica</i> (97.0%). Growth occurred at 30–50&#xa0;°C (optimum, 37–45&#xa0;°C) and pH 6.5–8.5 (optimum, pH 7.0–7.5). The respiratory isoprenoid quinone was ubiquinone Q-10. The polar lipids consisted of phosphatidylcholine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, unidentified amino lipid and unidentified lipid. The major cellular fatty acids (&gt; 10%) were C<sub>18:1</sub> <i>ω</i>7<i>c</i>, C<sub>18:1</sub> <i>ω</i>7<i>c</i> 11-methyl, C<sub>16:0</sub> and C<sub>18:0</sub>. The genomic DNA G + C content was 65.7%. The average nucleotide identity value between strain YIM 73028<sup>T</sup>&#xa0;and type species of <i>Tabrizicola aquatica</i> was lower than 95–96% threshold recommended for distinguishing novel prokaryotic species. Based on the phenotypic, physiological, chemotaxonomic, genotypic, and phylogenetic data, strain YIM 73028<sup>T</sup> represents a novel species of the genus <i>Tabrizicola</i>, for which the name <i>Tabrizicola caldifontis</i>&#xa0;sp. nov. is proposed. The type strain is YIM 73028<sup>T</sup> (= KCTC 52713<sup>T</sup> = CGMCC 1.16151<sup>T</sup>).</p>

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Tabrizicola caldifontis sp. nov., Isolated from Hot Spring Sediment Sample

  • Neeli Habib,
  • Inam Ullah Khan,
  • Muhammad Saqib,
  • Mohammad Saeid Hejazi,
  • Vahideh Tarhriz,
  • Sohail Ahmad Jan,
  • Cynthia Meza,
  • Aparna Banerjee,
  • Manik Prabhu Narsing Rao,
  • Wen-Jun Li

摘要

A Gram-stain-negative, ovoid to rod-shaped, aerobic, non-motile bacterial strain, designated YIM 73028T, was isolated from a sediment sample collected from a hot spring in Tibet, China. Phylogenetic analysis (based on the 16S rRNA gene sequences) indicated that strain YIM 73028T belongs to the genus Tabrizicola and showed the highest sequence similarity to the type strain of Tabrizicola aquatica (97.0%). Growth occurred at 30–50 °C (optimum, 37–45 °C) and pH 6.5–8.5 (optimum, pH 7.0–7.5). The respiratory isoprenoid quinone was ubiquinone Q-10. The polar lipids consisted of phosphatidylcholine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, unidentified amino lipid and unidentified lipid. The major cellular fatty acids (> 10%) were C18:1 ω7c, C18:1 ω7c 11-methyl, C16:0 and C18:0. The genomic DNA G + C content was 65.7%. The average nucleotide identity value between strain YIM 73028T and type species of Tabrizicola aquatica was lower than 95–96% threshold recommended for distinguishing novel prokaryotic species. Based on the phenotypic, physiological, chemotaxonomic, genotypic, and phylogenetic data, strain YIM 73028T represents a novel species of the genus Tabrizicola, for which the name Tabrizicola caldifontis sp. nov. is proposed. The type strain is YIM 73028T (= KCTC 52713T = CGMCC 1.16151T).