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Phycicoccus dokdonensis sp. nov., isolated from soil.

Jung-Hoon Yoon¹, Soo-Young Lee, So-Jung Kang

¹Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Republic of Korea. jhyoon@kribb.re.kr

International Journal of Systematic and Evolutionary Microbiology

|March 6, 2008

Summary

A novel bacterium, Phycicoccus dokdonensis sp. nov. strain DS-8(T), was discovered in Korean soil. This Gram-positive coccoid represents a new species within the Phycicoccus genus, distinct from its closest relative, Phycicoccus jejuensis.

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Area of Science:

Microbiology
Bacterial Taxonomy
Phylogenetics

Background:

The genus Phycicoccus encompasses Gram-positive bacteria with potential ecological significance.
Accurate bacterial classification is crucial for understanding microbial diversity and function.

Purpose of the Study:

To taxonomically characterize a novel bacterial isolate, strain DS-8(T), from Dokdo, Korea.
To determine if strain DS-8(T) represents a new species within the genus Phycicoccus.

Main Methods:

Polyphasic taxonomic study including 16S rRNA gene sequencing and phylogenetic analysis.
Determination of chemotaxonomic properties: cell-wall peptidoglycan, major fatty acids, menaquinone, and polar lipids.
DNA-DNA hybridization and DNA G+C content analysis.

Main Results:

Strain DS-8(T) is a Gram-positive, non-motile, coccoid bacterium with optimal growth at 30°C and pH 6.5-7.5.
Phylogenetic analysis based on 16S rRNA gene sequences showed 96.5% similarity to Phycicoccus jejuensis.
Chemotaxonomic data and DNA-DNA relatedness confirmed strain DS-8(T) as distinct from P. jejuensis, with a DNA G+C content of 70.7%.

Conclusions:

Strain DS-8(T) represents a novel species of the genus Phycicoccus.
The proposed name for this new species is Phycicoccus dokdonensis sp. nov.
The type strain is DS-8(T) (=KCTC 19248(T)=CCUG 54521(T)).