Candidatus Kuenenia stuttgartensis
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ABSTRACT:
PROVIDER: PRJNA1029808 | ENA |
REPOSITORIES: ENA
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Project description:Anaerobic ammonium-oxidising (anammox) bacteria, members of the ‘Candidatus Brocadiaceae’ family, play an important role in the nitrogen cycle and are estimated to be responsible for about half of the oceanic nitrogen loss to the atmosphere. Anammox bacteria combine ammonium with nitrite and produce dinitrogen gas via the intermediates nitric oxide and hydrazine (anammox reaction) while nitrate is formed as a by-product. These reactions take place in a specialized, membrane-bound compartment called the anammoxosome. Therefore, the substrates ammonium, nitrite and product nitrate have to cross the outer-, cytoplasmic- and anammoxosome membranes to enter or exit the anammoxosome. The genomes of all anammox species harbour multiple copies of ammonium-, nitrite- and nitrate transporter genes. Here we investigated how the distinct genes for ammonium-, nitrite- and nitrate- transport were expressed during substrate limitation in membrane bioreactors. Transcriptome analysis of Kuenenia stuttgartiensis planktonic cells under ammonium-limitation showed that three of the seven ammonium transporter genes and one of the six nitrite transporter genes were significantly upregulated, while another ammonium and nitrite transporter gene were downregulated in nitrite limited growth conditions. The two nitrate transporters were expressed to similar levels in both conditions. In addition, genes encoding enzymes involved in the anammox reaction were differentially expressed, with those using nitrite as a substrate being upregulated under nitrite limited growth and those using ammonium as a substrate being upregulated during ammonium limitation. Taken together, these results give a first insight in the potential role of the multiple nutrient transporters in regulating transport of substrates and products in and out of the compartmentalized anammox cell.
2020-06-05 | GSE148825 | GEO
Project description:Anaerobic ammonium oxidation bioreactor metagenome
| PRJNA16685 | ENA
Project description:Metatranscriptomic analysis of an anaerobic ammonium oxidizing community dominated by Kuenenia stuttgartiensis
| PRJNA117081 | ENA
Project description:Candidatus Kuenenia stuttgartiensis overview
| PRJNA36787 | ENA
Project description:Candidatus Kuenenia stuttgartensis Raw sequence reads
| PRJNA690211 | ENA
Project description:<p>Abstract:</p><p>Background: Quercetin is a flavonoid with various probiotic properties, demonstrating anti-inflammatory, anti-oxidative, anti-cancer, and anti-obesity effects in humans and animals. However, quercetin’s effect on enterotoxigenic Escherichia coli (ETEC) K88-induced host body injury mediated by bacterial quorum sensing remains insufficiently explored.</p><p>Results: Quercetin supplementation alleviated ETEC K88-induced body damage in weaned piglets, changed the microbial composition of the host intestinal tract, enriched the main probiotic Lactobacillus amylovorus, and inhibited microbial functions, such as virulence factor secretion. In addition, it influenced changes in AHL-type quorum-sensing signaling molecules in the host circulation. The signaling pathway alleviated ETEC K88-induced host intestinal barrier and inflammatory damage.</p><p>Conclusion: This study provides a theoretical framework for further understanding and exploring the use of quorum sensing as a medium to alleviate human and animal diseases caused by pathogenic bacteria and other external adverse factors.</p>
2026-01-14 | MTBLS13677 | MetaboLights
Project description:Paenibacillus polymyxa is an agriculturally important plant growth promoting rhizobacterium (PGPR). Many Paenibacillus species are known to be engaged in complex bacteria-bacteria and bacteria-host interactions, which in other bacteria were shown to necessitate quorum sensing communication, but to date no quorum sensing systems have been described in Paenibacillus. Here we show that the type strain P. polymyxa ATCC 842 encodes at least 16 peptide-based communication systems. Each of these systems comprises a pro-peptide that is secreted to the growth medium and further processed to generate a mature short peptide. Each peptide has a cognate intracellular receptor of the RRNPP family, and we show that external addition of P. polymyxa communication peptides to the medium leads to reprogramming of the transcriptional response. We found that these quorum sensing systems are conserved across hundreds of species belonging to the Paenibacillaceae family, with some species encoding more than 25 different peptide-receptor pairs, representing a record number of quorum sensing systems encoded in a single genome.
2020-08-05 | PXD015319 | Pride