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Oceanisphaera pacifica sp. nov., isolated from the intestine of Trichiurus japonicus

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Abstract

A Gram-stain-negative, strictly aerobic, non-flagellated, oxidase- and catalase-positive, rod-shaped marine bacterium, designated strain DM8T, was isolated from the intestine of Trichiurus japonicus in Weihai, China. The strain optimally grew at 25–35℃, with 1.0–4.0% (w/v) NaCl and at pH 7.0–8.0. Its colonies were circular, slightly yellow, non-transparent, smooth, and approximately 0.8–1.5 mm in diameter, after being cultured for 48 h on marine agar 2216. Based on the result of phylogenetic analysis of 16S rRNA gene sequence, strain DM8T had close relationship with Oceanisphaera profunda SM1222T (96.9%) and the type strain DSM 15406 T of the type species Oceanisphaera litoralis (94.7%), respectively. Genome sequencing revealed a genome size of 3,109,059 bp and a G + C content of 46.9 mol%. It had Q-8 as the sole respiratory quinone and possessed C16:0, summed features 3 (C16:1ω7c/C16:1ω6c) and summed features 8 (C18:1ω7c/C18:1ω6c) as major fatty acids. The major polar lipid profile was composed of phosphatidylglycerol and phosphatidylethanolamine. Based on the phenotypic, chemotaxonomic characterizations, phylogenetic properties and genome analysis, strain DM8T should represent a novel species of the genus Oceanisphaera, for which the name Oceanisphaera pacifica sp. nov. is proposed. The type strain is DM8T (= KCTC 82764 T = MCCC 1K06133T).

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Abbreviations

AAI:

Amino Acid Identity

ANI:

Average Nucleotide Identity

BD:

Becton Dickinson

dDDH:

Digital DNA–DNA Hybridization

DSMZ:

Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH

GGDC:

Genome-to-Genome Distance Calculator

HPLC:

High Performance Liquid Chromatography

KCTC:

Korean Collection for Type Cultures

KEGG:

Kyoto Encyclopedia of Genes and Genomes

MA:

Marine agar 2216

MB:

Marine broth 2216

MCCC:

Marine Culture Collection of China

MEGA:

Molecular Evolutionary Genetics Analysis

MIDI:

Microbial Identifcation System

TLC:

Thin-Layer Chromatography

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Acknowledgements

We thank Professor Zong-Jun Du, Shandong University, for kindly providing the type strain DSM 15406T of the type species Oceanisphaera litoralis.

Funding

This work was funded by the National Natural Science Foundation of China (32070002) and the National Science and Technology Fundamental Resources Investigation Program of China (2019FY100700).

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Authors and Affiliations

Authors

Contributions

JHX and LFS: isolated the strain DM8T, analysed most of the data. JHX, BNZ, WJW and YG: performed the experiments. The initial draft of the paper was written by JHX. LHZ and QZ: conceived of the study, designed the study, critically revised the manuscript and co-corresponding the study. All authors read, discussed the results and revised the manuscript.

Corresponding authors

Correspondence to Qian Zhu or Li-Hua Zhao.

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Authors declare that there is no conflict of interest.

Ethical approval

In this study, experiments were not performed on live vertebrates. Instead, freshly caught dead fish was used and this article does not contain any study with human participants or animal experiments by any of the authors.

Additional information

Communicated by Erko Stackebrandt.

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Xue, JH., Shi, LF., Zhang, BN. et al. Oceanisphaera pacifica sp. nov., isolated from the intestine of Trichiurus japonicus. Arch Microbiol 204, 338 (2022). https://doi.org/10.1007/s00203-022-02928-4

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  • DOI: https://doi.org/10.1007/s00203-022-02928-4

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