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Abstract

A novel methane-oxidizing bacterial strain SS37A-Re was isolated from surface soil of a rice paddy field in Japan. Cells were Gram-stain-negative, motile rods with single polar flagellum and type II intracytoplasmic membrane arrangement. The strain grew on methane or methanol as the sole carbon and energy source. It grew at 15–37 °C (optimum 25–30 °C), pH 6.0–9.0 (optimum 7.0–8.0) and with 0–0.1 % (w/w) NaCl (no growth at 0.5 % or above). Cells formed cysts, but not exospores. The results of sequence analysis of the 16S rRNA gene indicated that SS37A-Re represented a member of the family , with the highest similarity (98.9 %) to corrig. OBBP. Phylogenetic analysis of and genes and core genes in the genome indicated that the strain was closely related to the members of the genus , while the analysis of the gene indicated the close relationships with the genus . The values of genome relatedness between SS37A-Re and species of the genera and were 78.6–82.5% and 21.7–24.9 % estimated by the average nucleotide identity and digital DNA–DNA hybridisation, respectively, showing the highest values with LMG 27198. The DNA G+C content was 63.2 mol% (genome). The major quinone and fatty acids were Q-8 and, C (Cω8 and Cω8) and C, respectively. On the basis of the phenotypic and phylogenetic features, the strain represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is SS37A-Re (=JCM 34278 =NBRC 114996=KCTC 82710).

Funding
This study was supported by the:
  • New Energy and Industrial Technology Development Organization (Award JPNP18016)
    • Principle Award Recipient: SusumuAsakawa
  • Matsumae International Foundation (Award 18G11)
    • Principle Award Recipient: MohammadSaiful Alam
  • University Nazi BONI
    • Principle Award Recipient: JosephBenewindé Sawadogo
  • Public Foundation of Chubu Science and Technology Center (Award Greater Nagoya Invitation Fellowship for Foreign Researchers in the Field of Environment)
    • Principle Award Recipient: DayériDianou
  • ESPEC Foundation (Award Global Environment Research and Technology (Charitable Trust))
    • Principle Award Recipient: SusumuAsakawa
  • Japan Society for the Promotion of Science (Award JSPS Invitation Fellowship for Foreign Researchers)
    • Principle Award Recipient: DayériDianou
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/content/journal/ijsem/10.1099/ijsem.0.005925
2023-06-06
2025-01-26
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