Taxonomic and Genomic Characterization of <i>Niveibacterium terrae</i> sp. nov., a New Species from Riparian Soil in the Seomjin River, Republic of Korea
A novel Gram stain-negative, rod-shaped, non-motile bacterium, designated strain 24SJ04S-2<sup>T</sup>, was isolated from riparian soil near the Seomjin River, Republic of Korea. Phylogenetic analysis based on the 16S rRNA gene sequence placed strain 24SJ04S-2<sup>T</sup> wit...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
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| Series: | Diversity |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-2818/17/2/126 |
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| Summary: | A novel Gram stain-negative, rod-shaped, non-motile bacterium, designated strain 24SJ04S-2<sup>T</sup>, was isolated from riparian soil near the Seomjin River, Republic of Korea. Phylogenetic analysis based on the 16S rRNA gene sequence placed strain 24SJ04S-2<sup>T</sup> within the genus <i>Niveibacterium</i> in the family <i>Zoogloeaceae</i>, with high similarity to <i>Niveibacterium umoris</i> (97.3%) and <i>Niveibacterium microcysteis</i> (96.7%). Whole-genome sequencing revealed a genome size of 3.98 Mbp with a G+C content of 63.9 mol%, and genomic relatedness metrics confirmed that strain 24SJ04S-2<sup>T</sup> represents a novel species. The strain demonstrated unique growth characteristics, including tolerance to low salinity and a broad pH range (5.0 to 10.0), suggesting ecological adaptability to fluctuating riparian environments. Chemotaxonomic analysis identified ubiquinone-8 as the major quinone, with diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylethanolamine as dominant polar lipids. Fatty acid profiling showed that summed feature 3 (C<sub>16:1</sub><i>ω</i>7<i>c</i> and/or C<sub>16:1</sub><i>ω</i>6<i>c</i>) and C<sub>16:0</sub> were predominant. Genome analysis identified several biosynthetic gene clusters, including those potentially associated with antimicrobial and antioxidant compounds. Based on its distinct genomic and phenotypic characteristics, we propose the designation <i>Niveibacterium terrae</i> sp. nov. This discovery highlights the potential ecological and biotechnological roles of <i>Niveibacterium terrae</i> in nutrient cycling and environmental remediation in freshwater ecosystems. The type strain is 24SJ04S-2<sup>T</sup> (=KACC 23837<sup>T</sup> =FBCC-B16161<sup>T</sup>). |
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| ISSN: | 1424-2818 |