Analysis of the Genomes and Adaptive Traits of <i>Skermanella cutis</i> sp. nov., a Human Skin Isolate, and the Type Strains <i>Skermanella rosea</i> and <i>Skermanella mucosa</i>
The genus <i>Skermanella</i> comprises important soil bacteria that are often associated with the crop rhizospheres, but its physiological traits remain poorly understood. This study characterizes <i>Skermanella</i> sp. TT6<sup>T</sup>, isolated from human skin, w...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
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| Series: | Microorganisms |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-2607/13/1/94 |
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| Summary: | The genus <i>Skermanella</i> comprises important soil bacteria that are often associated with the crop rhizospheres, but its physiological traits remain poorly understood. This study characterizes <i>Skermanella</i> sp. TT6<sup>T</sup>, isolated from human skin, with a focus on its metabolic and environmental adaptations. Genome sequencing and phylogenomic analyses revealed that the strain TT6<sup>T</sup> is most closely related to <i>S. rosea</i> M1<sup>T</sup>, with average nucleotide identity and digital DNA–DNA hybridization values of 94.14% (±0.5%) and 64.7%, respectively. Comparative genomic analysis showed that the strains TT6<sup>T</sup>, <i>S. rosea</i> M1<sup>T</sup> and <i>S. mucosa</i> 8-14-6<sup>T</sup> share the Calvin cycle, and possess photosynthetic genes associated with the purple bacteria-type photosystem II. The strains TT6<sup>T</sup> and <i>S. rosea</i> M1<sup>T</sup> exhibited growth in a nitrogen-free medium under microaerobic conditions, which were generated in test tubes containing 0.1% soft agar. Under these conditions, with nitrate as a nitrogen source, <i>S. rosea</i> M1<sup>T</sup> formed gases, indicating denitrification. Strain TT6<sup>T</sup> also contains gene clusters involved in trehalose and carotenoid biosynthesis, along with salt-dependent colony morphology changes, highlighting its adaptive versatility. Genomic analyses further identified pathways related to hydrogenase and sulfur oxidation. Phenotypic and chemotaxonomic traits of strain TT6<sup>T</sup> were also compared with closely related type strains, confirming its genotypic and phenotypic distinctiveness. The new species, <i>Skermanella cutis</i> sp. nov., is proposed, with TT6<sup>T</sup> (=KCTC 82306<sup>T</sup> = JCM 34945<sup>T</sup>) as the type strain. This study underscores the agricultural and ecological significance of the genus <i>Skermanella</i>. |
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| ISSN: | 2076-2607 |