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Discovery of New Intracellular Pathogens by Amoebal Coculture and Amoebal Enrichment Approaches
Published on: October 27, 2013
Hymenobacter daecheongensis sp. nov., isolated from stream sediment
Jin-Li Xu1, Qing-Mei Liu, Hong-Shan Yu
1Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.
Summary
A novel red-pink bacterium, Hymenobacter daecheongensis sp. nov., was discovered in South Korean stream sediment. This Gram-negative bacterium expands the known diversity within the Hymenobacter genus.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Environmental Microbiology
Background:
- The genus Hymenobacter comprises Gram-negative bacteria found in diverse environments.
- Accurate bacterial classification is crucial for understanding microbial ecology and evolution.
Purpose of the Study:
- To taxonomically characterize a novel bacterium isolated from stream sediment.
- To determine if the isolate represents a new species within the Hymenobacter genus.
Main Methods:
- Polyphasic taxonomic analysis including 16S rRNA gene sequencing.
- Phylogenetic analysis to determine evolutionary relationships.
- Chemotaxonomic and phenotypic characterization (fatty acid profiles, DNA G+C content).
Main Results:
- Strain Dae14(T) was identified as a Gram-negative, aerobic, rod-shaped bacterium.
- Phylogenetic analysis placed strain Dae14(T) within the Hymenobacter genus, with 91.3–94.3% 16S rRNA gene sequence similarity to known species.
- Chemotaxonomic and phenotypic data, including predominant fatty acids (iso-C(15:0), C(16:1)ω5c, summed feature 5, iso-C(16:0)) and DNA G+C content (62.2 mol%), differentiated it from related species.
Conclusions:
- Strain Dae14(T) represents a novel species of the genus Hymenobacter.
- The proposed name for this new species is Hymenobacter daecheongensis sp. nov., with Dae14(T) as the type strain.
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