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Prevotella monensin concentration

ABSTRACT: Prevotella bryantii B14 was cultivated with monensin. Growth was monitored over a period of 9h with a broad range of monensin concentrations.

INSTRUMENT(S):

ORGANISM(S): Prevotella Bryantii B14

SUBMITTER: Jana Seifert

LAB HEAD: Prof. Jana Seifert

PROVIDER: PXD026085 | Pride | 2021-10-13

REPOSITORIES: Pride

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Prevotella_monensin_time series

Project description:Prevotella bryantii B14 was cultivated with monensin. Growth was monitored over a period of 72h including frequent sampling of cells.

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Prevotella species in the human gut is primarily comprised of Prevotella copri, Prevotella stercorea and related lineages.

Project description:Prevotella species in the human gut microbiome are primarily comprised of Prevotella copri, and its diversity and function were recently investigated in detail. Much less is known about other Prevotella species in the human gut. Here, we examined the composition of Prevotella species in human guts by mapping publicly available gut metagenomes to a dereplicated set of metagenome-assembled genomes (MAGs) representing Prevotella lineages found in human guts. In most human cohorts, P. copri is the most relatively abundant species (e.g. up to 14.3% relative abundance in Tangshan, China). However, more than half of the metagenome reads in several cohorts mapped to Prevotella MAGs representing P. stercorea and several other species sister to P. stercorea and P. copri. Analyses of genes encoded in these genomes indicated that P. stercorea and related lineages lacked many hemicellulose degrading enzymes and were thus less likely to metabolise hemicelluloses compared with P. copri and copri-related lineages. Instead, P. stercorea genomes possess several carbohydrate esterases that may be involved in releasing ester modifications from carbohydrates to facilitate their degradation. These findings reveal unexplored Prevotella diversity in the human gut and indicate possible niche partitions among these related species.

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Expanding the rumen Prevotella collection: The description of Prevotella communis, sp. nov. of ovine origin.

Project description:27 strains representing eight new Prevotella species were isolated from rumen of a single sheep in eight weeks interval. One of the putative species encompassing the highest number of isolated strains which also exhibited some genetic variability in preliminary data, was then selected for description of a novel species. We examined six strains in genomic and phenotypic detail, two of which may actually be the same strain isolated nearly three weeks apart. Other strains formed clearly diverged intraspecies lineages as evidenced by core genome phylogeny and phenotypic differences. Strains of the proposed new Prevotella species are strictly saccharolytic as is usual for rumen Prevotella, and use plant cell-wall xylans and pectins for growth. However, the range of cell-wall polysaccharides utilised for growth is rather limited compared to rumen generalists such as Prevotella bryantii or Prevotella ruminicola and this extends also to the inability to utilise starch, which is unexpected for the members of the genus Prevotella. Based on the data obtained, we propose Prevotella communis sp. nov. to accommodate strain E1-9T as well as other strains with the similar properties. The proposed species is widespread: two other strains were previously isolated from sheep in Japan and is also common in metagenomic data of cattle and sheep rumen samples from Scotland and New Zealand. It was also found in a collection of metagenome-assembled genomes originating from cattle in Scotland. Thus, it is a ubiquitous bacterium of domesticated ruminants specialising in degradation of a somewhat restricted set of plant cell wall components.

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