1887

Abstract

A Gram-stain-positive, facultative aerobic, oxidase-negative, catalase-positive, non-sporulating, and non-motile bacterium, which degraded benzophenone-3, was isolated from stream sediment collected in the Republic of Korea and designated as strain S2-17. Cells of this strain were rod-shaped during the early growth phase but became coccoid after the late exponential growth phase. Bacterial growth was observed at 15–37 °C (optimum, 25–30 °C) and pH 6.0–9.5 (optimum, pH 7.5–8.5) and in the presence of 0–9.0 % (w/v) NaCl (optimum, 0–1.0 %). Menaquinone-8 (H) was the sole isoprenoid quinone, and C, C 8, summed feature 3 (comprising C 7/C 6) and C 9 were the major fatty acids. The cell wall of strain S2-17 contained -diaminopimelic acid, and arabinose, galactose and mycolic acid were found in whole-cell hydrolysates, suggesting a chemotype IV cell wall. The G+C content of the genome was 65.6 mol%. Phylogenetic analyses revealed that strain S2-17 formed a phyletic lineage within the genus and was most closely related to DSM 44719 (99.2 % 16S rRNA gene sequence similarity). Average nucleotide identity and digital DNA–DNA hybridization values between strain S2-17 and DSM 44719 were 82.6 and 26.5 %, respectively, indicating differences between the species. Based on its phenotypic, chemotaxonomic and molecular features, strain S2-17 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is S2-17 (=KACC 19281=JCM 32046).

Funding
This study was supported by the:
  • Nakdonggang National Institute of Biological Resources (Award NNIBR202202107)
    • Principle Award Recipient: HyunMi Jin
  • Chung-Ang University
    • Principle Award Recipient: WoonheeBaek
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2022-06-15
2024-04-25
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