Nocardioides kongjuensis sp. nov., an N-acylhomoserine lactone-degrading bacterium

DOI Web Site 被引用文献1件
  • Jung-Hoon Yoon
    Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon 305-600, Korea
  • Jung-Kee Lee
    Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon 305-600, Korea
  • Seo-Youn Jung
    Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon 305-600, Korea
  • Jung-Ae Kim
    Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon 305-600, Korea
  • Ha-Kun Kim
    Department of Genetic Engineering, Paichai University, Taejon 302-735, Korea
  • Tae-Kwang Oh
    Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon 305-600, Korea

抄録

<jats:p>A Gram-positive, rod- or coccoid-shaped and<jats:italic>N</jats:italic>-hexanoyl-<jats:sc>l</jats:sc>-homoserine lactone-degrading bacterial strain, A2-4<jats:sup>T</jats:sup>, was isolated from a soil in Korea, and its taxonomic position was investigated by using a polyphasic approach. Strain A2-4<jats:sup>T</jats:sup>grew optimally at pH 7.0–8.0 and 30 °C without NaCl. Phylogenetic analyses based on 16S rRNA gene sequences revealed that strain A2-4<jats:sup>T</jats:sup>is most closely related to members of the genus<jats:italic>Nocardioides</jats:italic>. Strain A2-4<jats:sup>T</jats:sup>possessed chemotaxonomic properties indicative of members of the genus<jats:italic>Nocardioides</jats:italic>; the cell-wall peptidoglycan type was based on<jats:sc>ll</jats:sc>-diaminopimelic acid, MK-8(H<jats:sub>4</jats:sub>) was the predominant menaquinone and iso-C<jats:sub>16 : 0</jats:sub>was the predominant fatty acid. The DNA G+C content was 72.1 mol%. The 16S rRNA gene sequence of strain A2-4<jats:sup>T</jats:sup>was 98.3–99.1 % similar to those of the type strains of<jats:italic>Nocardioides simplex</jats:italic>,<jats:italic>Nocardioides aromaticivorans</jats:italic>and<jats:italic>Nocardioides nitrophenolicus</jats:italic>and 93.8–96.3 % similar to those of the type strains of other<jats:italic>Nocardioides</jats:italic>species. Strain A2-4<jats:sup>T</jats:sup>could be distinguished from the three phylogenetic relatives,<jats:italic>N. nitrophenolicus</jats:italic>,<jats:italic>N. aromaticivorans</jats:italic>and<jats:italic>N. simplex</jats:italic>, by DNA–DNA relatedness (25–42 %) and by differences in some phenotypic characteristics. On the basis of the phenotypic, phylogenetic and genetic data, the strain represents a novel species of the genus<jats:italic>Nocardioides</jats:italic>, for which the name<jats:italic>Nocardioides kongjuensis</jats:italic>sp. nov. is proposed. The type strain is A2-4<jats:sup>T</jats:sup>(=KCTC 19054<jats:sup>T</jats:sup>=JCM 12609<jats:sup>T</jats:sup>).</jats:p>

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