Abstract
A marine bacterial strain, named NTOU-MSR1T, was isolated from marine sediment of northern coast of Taiwan. This bacterium was Gram-stain-negative, aerobic, and motile, with a single flagellum. Its rod-shaped cells measured approximately 0.5–0.6 µm in width and 1.8–2.0 μm in length. NTOU-MSR1T grew at temperatures ranging from 10 to 45 °C, optimally at 30 °C. The pH range for growth was 7.0–10.0, with optimal growth at pH 7.0–8.0. It tolerated NaCl concentrations up to 12%. The cell membrane predominantly contained fatty acids such C16:1ω7c, C18:1ω7c, and C16:0. The overall genome relatedness indices indicated that strain NTOU-MSR1T had an average nucleotide identity (ANI) of 87.88% and a digital DNA-DNA hybridization (dDDH) value of 35.40% compared to its closest related species, O. marisflavi 102-Na3T. These values fell below the 95% and 70% threshold for species delineation, respectively. These findings suggested that the strain NTOU-MSR1T was a new member of the Oceanimonas genus. Its genomic DNA had a G + C content of 61.0 mol%. Genomic analysis revealed genes associated with the catechol branch of β- ketoadipate pathway for degrading polycyclic aromatic hydrocarbons, resistance to heavy metal, biosynthesis of polyhydroxybutyrate and the production of glycoside hydrolases (GH19, GH23, and GH103) for chitin and glycan digestion. Additionally, NTOU-MSR1T was capable of synthesizing biosurfactants and potentially degrading plastic. The proposed name for this new species is Oceanimonas pelagia, with the type strain designated as NTOU-MSR1T (= BCRC 81403T = JCM 36023T).
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Data availability
The bacterium Oceanimonas pelagia NTOU-MSR1T has been deposited in the BCRC collection with the accession number BCRC 81403, and in the JCM collection with the accession number JCM 36023. The 16S rRNA sequence and the complete whole genome sequence of Oceanimonas pelagia NTOU-MSR1T have been deposited in the GenBank database under accession numbers OQ450183 and CP118224. The supplementary file is available in the online edition of this article.
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Acknowledgements
The authors thank the Electron Microscopy Center of Institute of Marine Biology at National Taiwan Ocean University for technical assistance and the Biological Resource Center (BCRC) for their technical expertise in conducting fatty acid identification for this study.
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This study was supported by the National Science and Technology Council of Taiwan (MOST 111–2628-M-019–001-MY3).
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YHT and HYN wrote the main manuscript content. YHT isolated and the bacterium and performed all experiments. HYH conducted the experiments to assess the bacterial plastic degradation potential. HYN and YHT prepare all figures, as well as the supplementary file, and reviewed the manuscript.
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Yang, HT., Huang, YH. & Ho, YN. Oceanimonas pelagia sp. nov., a novel biosurfactant-producing and plastic-degrading potential bacterium isolated from marine coastal sediment. Antonie van Leeuwenhoek 117, 49 (2024). https://doi.org/10.1007/s10482-024-01948-y
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DOI: https://doi.org/10.1007/s10482-024-01948-y