Affiliation:
1. Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon 305-600, Korea
2. Department of Genetic Engineering, Paichai University, Taejon 302-735, Korea
Abstract
A Gram-positive, rod- or coccoid-shaped andN-hexanoyl-l-homoserine lactone-degrading bacterial strain, A2-4T, was isolated from a soil in Korea, and its taxonomic position was investigated by using a polyphasic approach. Strain A2-4Tgrew optimally at pH 7.0–8.0 and 30 °C without NaCl. Phylogenetic analyses based on 16S rRNA gene sequences revealed that strain A2-4Tis most closely related to members of the genusNocardioides. Strain A2-4Tpossessed chemotaxonomic properties indicative of members of the genusNocardioides; the cell-wall peptidoglycan type was based onll-diaminopimelic acid, MK-8(H4) was the predominant menaquinone and iso-C16 : 0was the predominant fatty acid. The DNA G+C content was 72.1 mol%. The 16S rRNA gene sequence of strain A2-4Twas 98.3–99.1 % similar to those of the type strains ofNocardioides simplex,Nocardioides aromaticivoransandNocardioides nitrophenolicusand 93.8–96.3 % similar to those of the type strains of otherNocardioidesspecies. Strain A2-4Tcould be distinguished from the three phylogenetic relatives,N. nitrophenolicus,N. aromaticivoransandN. simplex, 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 genusNocardioides, for which the nameNocardioides kongjuensissp. nov. is proposed. The type strain is A2-4T(=KCTC 19054T=JCM 12609T).
Subject
General Medicine,Ecology, Evolution, Behavior and Systematics,Microbiology
Cited by
45 articles.
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