AI Article Synopsis
- The newly sequenced and existing genomes of the Omnitrophota phylum were analyzed to better understand their habitat, metabolism, and lifestyles, revealing a diversity of 6 classes and 276 species.
- Most Omnitrophota are ultra-small (~0.2 μm) and are commonly found in water, sediments, and soils, possessing reduced genomes yet retaining key biosynthetic and energy pathways.
- A significant portion of Omnitrophota genomes suggests they have symbiotic relationships, and some families were linked to obligate predatory lifestyles, indicating they may act as predators or parasites in various ecosystems.
Article Abstract
Candidate bacterial phylum Omnitrophota has not been isolated and is poorly understood. We analysed 72 newly sequenced and 349 existing Omnitrophota genomes representing 6 classes and 276 species, along with Earth Microbiome Project data to evaluate habitat, metabolic traits and lifestyles. We applied fluorescence-activated cell sorting and differential size filtration, and showed that most Omnitrophota are ultra-small (~0.2 μm) cells that are found in water, sediments and soils. Omnitrophota genomes in 6 classes are reduced, but maintain major biosynthetic and energy conservation pathways, including acetogenesis (with or without the Wood-Ljungdahl pathway) and diverse respirations. At least 64% of Omnitrophota genomes encode gene clusters typical of bacterial symbionts, suggesting host-associated lifestyles. We repurposed quantitative stable-isotope probing data from soils dominated by andesite, basalt or granite weathering and identified 3 families with high isotope uptake consistent with obligate bacterial predators. We propose that most Omnitrophota inhabit various ecosystems as predators or parasites.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10066038 | PMC |
| http://dx.doi.org/10.1038/s41564-022-01319-1 | DOI Listing |
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Article Synopsis
- The newly sequenced and existing genomes of the Omnitrophota phylum were analyzed to better understand their habitat, metabolism, and lifestyles, revealing a diversity of 6 classes and 276 species.
- Most Omnitrophota are ultra-small (~0.2 μm) and are commonly found in water, sediments, and soils, possessing reduced genomes yet retaining key biosynthetic and energy pathways.
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