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Bioprospecting of Extremophilic Microorganisms to Address Environmental Pollution
Published on: December 30, 2021
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Neobacillus terrae sp. nov., isolated from mountain soil
Dong Min Han1, Dae Gyu Choi1, Ju Hye Baek1
1Department of Life Science, Chung-Ang University, Seoul 06974, Republic of Korea.
Summary
A novel bacterium, Neobacillus terrae C11T, was discovered in Korean mountain soil. This spore-forming bacterium expands the Neobacillus genus, offering new insights into soil microbial diversity.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Environmental Microbiology
Background:
- Soil microbial communities harbor diverse, yet uncharacterized, bacterial species.
- Understanding bacterial diversity is crucial for ecological and biotechnological applications.
Purpose of the Study:
- To characterize a novel bacterial isolate from mountain soil.
- To determine the taxonomic placement of the isolate within existing bacterial genera.
Main Methods:
- Isolation and cultivation of bacterial strain C11T from mountain soil.
- Phenotypic characterization including Gram staining, motility, and growth conditions.
- Chemotaxonomic analysis of isoprenoid quinones, fatty acids, and polar lipids.
- Molecular phylogenetic analyses using 16S rRNA gene sequencing and whole-genome data.
- Genomic DNA G+C content determination.
Main Results:
- Strain C11T is a Gram-positive, spore-forming, facultative aerobic, motile rod.
- Optimal growth observed at 30-37°C, pH 6.0, and 0.5% NaCl.
- Chemotaxonomic data revealed MK-7 as the sole quinone and specific major fatty acids and polar lipids.
- Phylogenetic analysis placed strain C11T within the genus *Neobacillus*, closely related to *Neobacillus drentensis*.
- High 16S rRNA gene sequence similarity (98.0%) to *N. drentensis* but distinct ANI and dDDH values.
Conclusions:
- Strain C11T represents a novel species within the genus *Neobacillus*.
- The proposed name for this new species is *Neobacillus terrae* sp. nov.
- This discovery contributes to the understanding of bacterial diversity in soil ecosystems.
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