Abstract:
:A methanogenic organism from the domain Archaea, designated strain T10(T), was isolated from groundwater sampled from a deep diatomaceous shale formation located in Horonobe, Hokkaido, Japan. The strain utilized H2/CO2 and formate as substrates for methanogenesis. Cells were strictly anaerobic, Gram-negative-staining, flagellated, irregular coccoids, 0.7-1.6 µm in diameter, and occurred singly. The strain grew at 25-45 °C (optimum 37-42 °C), at pH 5.8-8.2 (optimum pH 6.7-6.8) and in the presence of 0-1.3 M NaCl (optimum 0.1-0.2 M NaCl). The G+C content of the genomic DNA was 62.9 mol%. 16S rRNA gene sequencing revealed that, although the strain is a member of the genus Methanoculleus, it clearly differed from all described species of this genus (95.5-98.3 % sequence similarity). Values for DNA-DNA hybridization with type strains of closely related Methanoculleus species were less than 50 %. Phenotypic and phylogenetic features of strain T10(T) clearly indicate that it represents a novel species of the genus Methanoculleus, for which the name Methanoculleus horonobensis sp. nov. is proposed. The type strain is T10(T) ( = DSM 21626(T) = JCM 15517(T)).
journal_name
Int J Syst Evol Microbiolauthors
Shimizu S,Ueno A,Tamamura S,Naganuma T,Kaneko Kdoi
10.1099/ijs.0.053520-0subject
Has Abstractpub_date
2013-11-01 00:00:00pages
4320-4323issue
Pt 11eissn
1466-5026issn
1466-5034journal_volume
63pub_type
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