期刊
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
卷 60, 期 -, 页码 861-865出版社
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.013466-0
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- Department of Biotechnology, Ministry of Science and Technology, Government of India
A moderately thermophilic bacterial strain (HT4(T)) isolated from a hot spring sediment was characterized phenotypically and phylogenetically. Cells were Gram-negative, aerobic, non-sporulating, rod-shaped and motile by means of a single polar flagellum. Both oxidase and catalase activities were positive. Heterotrophic growth was observed at pH 6.0-8.5 and at 20-50 degrees C; optimum growth occurred at pH 7.5-8.0 and 37-42 degrees C. The major cellular fatty acids were C-14:0 3-OH, C-18:0 3-OH, C-18:1 2-OH, C-18:1 omega 7C and C-19.0 cyclo omega 8c. The DNA G+C content of strain HT4(T) was 67.8 mol%. 16S rRNA gene sequence analysis indicated that strain HT4(T) clustered within the radiation of the genus Chelatococcus and showed 99.0% similarity with Chelatococcus daeguensis CCUG 54519(T) and 96% similarity with Chelatococcus asaccharovorans DSM 6462(T). However, levels of DNA DNA relatedness between strain HT4(T) and Chelatococcus daeguensis CCUG 54519(T) and Chelatococcus asaccharovorans DSM 6462(T) were 52 and 20%, respectively. On the basis of the phenotypic, physiological and chemotaxonomic data, 16S rRNA gene sequence analysis and DNA DNA hybridization results, strain HT4(T) is considered to represent a novel species of the genus Chelatococcus, for which the name Chelatococcus sambhunathii sp. nov. is proposed. The type strain is HT4(T) (=DSM 18167(T)=JCM 14988T).
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