title: Thermus arciformis sp. nov., a thermophilic species from a geothermal area.
abstract: Two aerobic, Gram-negative, non-motile, non-sporulating, yellow-pigmented bacteria, strains TH92(T) and TH91, were isolated from a hot spring located in Laibin, Guangxi, in the south-eastern geothermal area of China. The isolates grew at 40-77 degrees C (optimally at 70 degrees C) and at pH 6.0-9.5 (optimally at pH 7.5-8.0). Phylogenetic analysis of 16S rRNA gene sequences and levels of DNA-DNA relatedness together indicated that the new isolates represented a novel species of the genus Thermus with closest affinity to Thermus aquaticus, Thermus igniterrae and Thermus thermophilus. Compared with their closest relatives, strains TH92( T) and TH91 were able to assimilate a wider range of carbohydrates, amino acids and organic acids as sole carbon sources for growth, such as lactose and melibiose. The new isolates had lower combined levels of C(16 : 0 ) and iso-C(16 : 0) compared with their closest relatives. On the basis of polyphasic taxonomic characterization, strains TH92(T) and TH91 are considered to represent a single novel species of the genus Thermus, for which the name Thermus arciformis sp. nov. is proposed. The type strain is TH92(T) (=CGMCC 1.6992(T) =JCM 15153(T)).
authors: College of Life Sciences, Zhejiang University, Hangzhou 310058, PR China.
authors: Xin-Qi
authors: XQ
authors: Zhang
authors: College of Life Sciences, Zhejiang University, Hangzhou 310058, PR China.
authors: Yi
authors: Y
authors: Ying
authors: Basic Medical College, Guangxi Medical University, Nanning 530021, PR China.
authors: Ying
authors: Y
authors: Ye
authors: Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, PR China.|Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration, Hangzhou 310012, PR China.
authors: Xue-Wei
authors: XW
authors: Xu
authors: College of Life Sciences, Zhejiang University, Hangzhou 310058, PR China.
authors: Xu-Fen
authors: XF
authors: Zhu
authors: College of Life Sciences, Zhejiang University, Hangzhou 310058, PR China.
authors: Min
authors: M
authors: Wu
mesh_terms: D015373:Bacterial Typing Techniques; D002681:China; D004275:DNA, Ribosomal / Q000032:analysis / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D020459:Genes, rRNA; D005838:Genotype; D045482:Hot Springs / Q000382:microbiology*; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010641:Phenotype; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013045:Species Specificity; D013824:Thermus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology
chemical_list: D004275:DNA, Ribosomal; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S