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- W4311583822 abstract "Abstract Microbes in marine sediments play crucial roles in global carbon and nutrient cycling. However, our understanding of microbial diversity and physiology on the ocean floor is limited. Here, we use phylogenomic analyses of thousands of metagenome-assembled genomes (MAGs) from coastal and deep-sea sediments to identify 55 MAGs that are phylogenetically distinct from previously described bacterial phyla. We propose that these MAGs belong to 4 novel bacterial phyla (Blakebacterota, Orphanbacterota, Arandabacterota, and Joyebacterota) and a previously proposed phylum (AABM5-125-24), all of them within the FCB superphylum. Comparison of their rRNA genes with public databases reveals that these phyla are globally distributed in different habitats, including marine, freshwater, and terrestrial environments. Genomic analyses suggest these organisms are capable of mediating key steps in sedimentary biogeochemistry, including anaerobic degradation of polysaccharides and proteins, and respiration of sulfur and nitrogen. Interestingly, these genomes code for an unusually high proportion (~9% on average, up to 20% per genome) of protein families lacking representatives in public databases. Genes encoding hundreds of these protein families colocalize with genes predicted to be involved in sulfur reduction, nitrogen cycling, energy conservation, and degradation of organic compounds. Our findings advance our understanding of bacterial diversity, the ecological roles of these bacteria, and potential links between novel gene families and metabolic processes in the oceans." @default.
- W4311583822 created "2022-12-27" @default.
- W4311583822 creator A5002376984 @default.
- W4311583822 creator A5004212941 @default.
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- W4311583822 creator A5026163709 @default.
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- W4311583822 creator A5050318013 @default.
- W4311583822 creator A5054250936 @default.
- W4311583822 creator A5082295616 @default.
- W4311583822 date "2022-12-06" @default.
- W4311583822 modified "2023-10-01" @default.
- W4311583822 title "New globally distributed bacterial phyla within the FCB superphylum" @default.
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