Cyclic di-GMP Regulates Shigella flexneri Pathogenesis
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA726970 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR14407612_1.fastq.gz | Fastqsanger.gz | |||
| SRR14407612_2.fastq.gz | Fastqsanger.gz | |||
| SRR14407613_1.fastq.gz | Fastqsanger.gz | |||
| SRR14407613_2.fastq.gz | Fastqsanger.gz | |||
| SRR14407614_1.fastq.gz | Fastqsanger.gz |
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Project description:We compared the transcriptomes of S. flexneri strains expressing the diguanylate cyclase VCA0956 (derived from V. cholerae)
2021-09-01 | GSE173759 | GEO
Project description:Cyclic di-GMP (c-di-GMP) is a ubiquitous second messenger that regulates many biological processes in bacteria. The genome in Mycobacterium tuberculosis encodes a single copy of the diguanylate cyclase gene (dgc) responsible for c-di-GMP synthesis. To determine the role of c-di-GMP signaling in M. tuberculosis, the mutant strain of Δdgc was generated in the virulent H37Rv strain. We used whole genome microarray expression profiling as a discovery platform to identify the genes controlled by c-di-GMP in M. tuberculosis, providing molecular proof for the phenotypes modulated by the signaling.
2013-10-09 | GSE37973 | GEO
Project description:The innate immune system responds to unique molecular signatures that are widely conserved among microbes but that are not normally present in host cells. Compounds that stimulate innate immune pathways may be valuable in the design of novel adjuvants, vaccines, and other immunotherapeutics.The cyclic dinucleotide cyclic-di-guanosine monophosphate (c-di-GMP) is a recently appreciated second messenger that plays critical regulatory roles in many species of bacteria but is not produced by eukaryotic cells. In vivo and in vitro studies have previously suggested that c-di-GMP is a potent immunostimulatory compound recognized by mouse and human cells. Here we provide evidence that c-di-GMP is sensed in the cytosol of mammalian cells via a novel immunosurveillance pathway. The potency of cytosolic signaling induced by cyclic-di- GMP is comparable to that induced by cytosolic delivery of DNA, and both nucleic acids induce a similar transcriptional profile, including triggering of type I interferons and coregulated genes via induction of TBK1, IRF3, NF-!B and MAP kinases. However, the cytosolic pathway that senses c-di-GMP appears to be distinct from all known nucleic acid-sensing pathways.Our results suggest a novel mechanism by which host cells can induce an inflammatory response to a widely produced bacterial ligand. Three-condition experiment: macrophages transfected with mono-GMP (negative control), double-stranded DNA (positive control), or cyclic-di-GMP (experimental condition). Biological replicates: two, independently treated, harvested, and hybridized to arrays. One replicate per array, except two technical replicates were performed for one of the positive control samples.
2009-07-21 | E-GEOD-16943 | biostudies-arrayexpress
Project description:Cyclic di-GMP (c-di-GMP) is a ubiquitous second messenger that regulates many biological processes in bacteria. The genome in Mycobacterium tuberculosis encodes a single copy of the diguanylate cyclase gene (dgc) responsible for c-di-GMP synthesis. To determine the role of c-di-GMP signaling in M. tuberculosis, the mutant strain of Δdgc was generated in the virulent H37Rv strain. We used whole genome microarray expression profiling as a discovery platform to identify the genes controlled by c-di-GMP in M. tuberculosis, providing molecular proof for the phenotypes modulated by the signaling. Wild-type H37Rv and Δdgc cultures were analyzed under aerobic conditions or in an in vitro dormancy model. Bacteria were collected at OD600 =1.3 for the aerobic cultures and upon the beginning of anaerobiosis for the cultures in the dormancy model. One culture for each experiment was assayed except for Δdgc under anaerobiosis (2 independent cultures).
2013-10-09 | E-GEOD-37973 | biostudies-arrayexpress
Project description:Transcriptomic analysis used to understand the influence of elevated intracellular cyclic-di-GMP in Shewanella oneidensis on expression of c-type cytochrome at transcript level.
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Project description:The innate immune system responds to unique molecular signatures that are widely conserved among microbes but that are not normally present in host cells. Compounds that stimulate innate immune pathways may be valuable in the design of novel adjuvants, vaccines, and other immunotherapeutics.The cyclic dinucleotide cyclic-di-guanosine monophosphate (c-di-GMP) is a recently appreciated second messenger that plays critical regulatory roles in many species of bacteria but is not produced by eukaryotic cells. In vivo and in vitro studies have previously suggested that c-di-GMP is a potent immunostimulatory compound recognized by mouse and human cells. Here we provide evidence that c-di-GMP is sensed in the cytosol of mammalian cells via a novel immunosurveillance pathway. The potency of cytosolic signaling induced by cyclic-di- GMP is comparable to that induced by cytosolic delivery of DNA, and both nucleic acids induce a similar transcriptional profile, including triggering of type I interferons and coregulated genes via induction of TBK1, IRF3, NF-!B and MAP kinases. However, the cytosolic pathway that senses c-di-GMP appears to be distinct from all known nucleic acid-sensing pathways.Our results suggest a novel mechanism by which host cells can induce an inflammatory response to a widely produced bacterial ligand.
2009-07-22 | GSE16943 | GEO
Project description:We evaluated the transcriptome changes induced by infection of Hela 229 cells with Shigella flexneri. The sample set consists of a control (mock), total population of infected sample and infected sample sorted into Shigella positive and Shigella negative population.
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Project description:Sinorhizobium meliloti is a soil-dwelling symbiotic alphaproteobacterium. Cyclic di-GMP is an important second messenger controlling multiple functions in this microorganism. To understand transcriptional regulation by elevated c-di-GMP in S. meliloti, the transcriptome analysis was performed on the wild type strain S. meliloti Rm2011 carrying either an empty vector pWBT or diguanylate cyclase gene pleD overexpression plasmid pWBT-pleD.
2017-06-01 | E-MTAB-5410 | biostudies-arrayexpress
Project description:<p>Cyclic di-GMP (c-di-GMP) is a well-known second messenger that plays a key role in many physiological processes in bacteria. The synthesis of lipids is essential for bacterial biofilm formation. However, whether c-di-GMP signaling modulates the synthesis of lipid and further regulates biofilm formation in mycobacteria is unclear, and the c-di-GMP receptor involved remains unknown. In this study, we characterized the nucleoid-associated protein (NAP) Lsr2 as a novel c-di-GMP receptor in mycobacteria. c-di-GMP specifically binds to Lsr2 at a ratio of 1:1. We showed that c-di-GMP promotes mycobacterial biofilm formation in a manner dependent on Lsr2. Furthermore, Lsr2 mediates the synthesis of keto-mycolic acid, the lipid component of the mycobacterial cell wall, by positively regulating the expression of HadD, a (3R)-hydroxyacyl-ACP dehydratase, thus, Lsr2 ultimately controls biofilm formation. Finally, c-di-GMP promotes the positive regulation of HadD by Lsr2 and mycobacterial biofilm formation. Thus, we report a novel c-di-GMP receptor that links the second messenger’s function to lipid synthesis and biofilm formation in mycobacteria.</p>
2023-12-12 | MTBLS7053 | MetaboLights
Project description:The cyanobacterial phytochrome Cph2 is a light-dependent diguanylate cyclase producing the second messenger c-di-GMP. Under blue light, the Cph2-dependent increase in the cellular c-di-GMP concentration leads to inhibition of motility in the cyanobacterium Synechocystis 6803. However, the targets of c-di-GMP in this cyanobacterium and its mechanism of action remained unclear. Here, we determined the cellular concentrations of three cyclic nucleotides in wild-type and Δcph2 cells after blue- and green light illumination. Inactivation of the photoreceptor gene completely abolished the blue-light dependent increase in the c-di-GMP content. Microarray analysis revealed that in the wild type in comparison to the Δcph2 mutant, blue light mainly led to a change in accumulation of mRNAs encoding minor pilins, putative chaperone usher pili as well as several chemotaxis regulators. The mRNA encoding the minor pilins pilA5-pilA6 is negatively affected by high c-di GMP content under blue light, whereas the minor pilin encoding operon pilA9-slr2018 accumulates under the same conditions, suggesting opposing functions of the respective gene sets. Based on mutational and gene expression analysis, we further suggest that the second Synechocystis 6803 homolog of a CRP-like transcription factor, SyCRP2, is the regulator of minor pilin gene expression and of putative chaperone usher pili genes slr1667/slr1668. Thus, our work indicates that the Cph2-mediated increase in cellular c-di-GMP concentration upon blue-light illumination specifically changes the transcriptome of Synechocystis 6803.
2020-03-23 | GSE116409 | GEO