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Updated: May 31, 2026
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Visualizing Methane-Cycling Microbial Dynamics in Coastal Wetlands
Published on: January 31, 2025
Muricauda beolgyonensis sp. nov., isolated from a tidal flat
Soo-Young Lee1, Sooyeon Park1, Tae-Kwang Oh1
1Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yuseong, Daejeon, Republic of Korea.
Summary
A novel bacterium, strain BB-My12(T), was isolated from Korean tidal flats. Phylogenetic and phenotypic analyses reveal it represents a new species, Muricauda beolgyonensis sp. nov.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Marine Microbiology
Background:
- Bacterial taxonomy relies on polyphasic approaches to classify microorganisms.
- Tidal flat sediments are rich microbial habitats, often yielding novel species.
- The genus Muricauda comprises marine bacteria with diverse ecological roles.
Purpose of the Study:
- To taxonomically characterize a novel bacterial isolate, strain BB-My12(T), from a Korean tidal flat.
- To determine if strain BB-My12(T) represents a new species within the genus Muricauda.
- To provide a comprehensive description of the novel bacterium for formal classification.
Main Methods:
- Polyphasic taxonomic analysis, including 16S rRNA gene sequencing.
- Phylogenetic analysis to determine evolutionary relationships.
- Phenotypic characterization: optimal growth conditions, cellular fatty acid composition, and DNA G+C content.
- DNA-DNA hybridization to assess genetic relatedness to known species.
Main Results:
- Strain BB-My12(T) is a Gram-negative, non-motile, rod-shaped bacterium.
- Phylogenetic analysis placed strain BB-My12(T) within the genus Muricauda, with high 16S rRNA gene similarity to M. aquimarina, M. lutimaris, and M. ruestringensis.
- DNA-DNA relatedness values between strain BB-My12(T) and related type strains were low (5-7%), indicating genetic distinctiveness.
- Major cellular fatty acids included iso-C(15:1), iso-C(17:0) 3-OH, and iso-C(15:0); predominant menaquinone was MK-6.
- DNA G+C content was 45.0 mol%.
Conclusions:
- Strain BB-My12(T) represents a novel species of the genus Muricauda based on distinct phylogenetic and genetic properties.
- The proposed name for the novel species is Muricauda beolgyonensis sp. nov.
- The type strain is BB-My12(T) (= KCTC 23501(T) = CCUG 60800(T)).
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