The impact of c-di-AMP levels on gene expression in Enterococcus faecalis
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ABSTRACT:
PROVIDER: PRJNA729656 | ENA |
REPOSITORIES: ENA
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Project description:Second messenger nucleotides such as c-di-AMP are produced by bacteria in response to environmental stimuli and can contribute to the regulation of a number of cellular processes including osmoregulation, envelope homeostasis, central metabolism, and biofilm formation. Here, as part of an effort to uncover the biological significance of c-di-AMP in the opportunistic pathogen Enterococcus faecalis, we utilized high-throughout RNA Sequencing analysis to explore the impact of deletion of genes responsible for c-di-AMP synthesis (cdaA) and degradation (dhhP and gdpP).
2021-05-14 | GSE174381 | GEO
Project description:Streptococcus pneumoniae harbors two cyclic di-AMP (c-di-AMP) phosphodiesterases Pde1 and Pde2. Previously, we demonstrated that deletion of one or both of these proteins leads to growth retardation in culture media, defects in the bacterial stress response, and attenuation in mouse models of disease. All of these phenotypes are due to increased levels of c-di-AMP, since the nature and break down products of each protein are different, and mutations that lower c-di-AMP levels partially restore growth and stress tolerance in these mutants. However, how c-di-AMP mediates pneumococcal stress resistance and virulence is unknown. To establish how c-di-AMP affects the transcriptome, RNA-Seq analysis was employed to compare gene expression between wild-type and Δpde1Δpde2 (ST2734) pneumococci. Overall, the competence regulon was upregulated in the Δpde1Δpde2 mutant.
2018-04-18 | GSE113231 | GEO
Project description:C-di-AMP is primarily associated with the regulation of carbon utilization as well as other central traits, central metabolism, and bacterial stringent response to environmental changes. Elevated c-di-AMP levels result in aberrant physiology for most c-di-AMP synthesizing organisms, drawing particular attention to the importance of the c-di-AMP homeostasis and the molecular mechanisms pertaining to nucleotide metabolism and signal transduction. Here we show that c-di-AMP binds the GntR-family regulator DasR, uncovering a direct link between c-di-AMP and GlcNAc signaling. Further, we show c-di-AMP functions as an allosteric activator of DasR activity. GlcNAc is necessary for cell-surface structure from bacteria to humans, as well as a signal for bacterial development and antibiotic production. DasR is a global repressor that oversees GlcNAc metabolism and antibiotic production, which enables Actinobacteria to cope with stress and starvation. Our in vivo studies reveal the important biological role of allosteric regulation by c-di-AMP in metabolic imbalance and the transduction of a series of signals. Notably, DasR also controls intracellular c-di-AMP level through direct repression on disA. Overall, we identify a function of allosteric regulation between c-di-AMP and DasR in global signal integration and c-di-AMP homeostasis in bacteria, which is likely widespread in Actinobacteria.
2024-03-31 | GSE229938 | GEO
Project description:Cyclic di-AMP is an essential second messenger in many Gram-positive bacteria, including the model organism Bacillus subtilis. Here, we analyzed the transcriptome of a strain accumulating c-di-AMP in vivo. Our results demonstrate that accumulation of c-di-AMP affects the expression of several hundred genes, among them many mother-cell specific sporulation genes. Additionally, the two major biofilm operons, epsA-O and tapA-sipW-tasA, are affected. High levels of c-di-AMP abolish transcription of genes responsible for biofilm formation which in turn leads to a defect in complex colony formation in B. subtilis.
2016-05-25 | GSE79716 | GEO
Project description:Gene regulation by elevated c-di-AMP levels in Streptococcus pneumoniae
| PRJNA450521 | ENA
Project description:The microarrays experiments was performed with the purpose of identify transcriptional networks activated by copper. This experiment correspond the work tituled Enterococcus faecalis reconfigure the activation of its transcriptional regulatory networks under different copper exposure levels (work in preparation).Mauricio Latorrea,b, Jessica Galloway-PeM-CM-1ac,d,e, Jung Hyeo Rhoc,d, Marko Budinichf, Barbara E. Murrayc,d,e, Alejandro Maassb,f, Mauricio GonzM-CM-!leza,b,f*. a INTA, Laboratorio de BioinformM-CM-!tica y ExpresiM-CM-3n GM-CM-)nica, INTA, Universidad de Chile, Santiago, Chile. b Center for Genome Regulation (Fondap 15090007), University of Chile, Santiago, Chile. c Division of Infectious Disease, Department of Medicine, University of Texas Medical School, Houston, Texas, United States of America. d Center for the Study of Emerging and Reemerging Pathogens, University of Texas Medical School, Houston, Texas, United States of America. e Department of Microbiology and Molecular Genetics, University of Texas Medical School, Houston, Texas, United States of America f Mathomics, Center for Mathematical Modeling (UMI2807CNRS), Santiago, Chile. * Corresponding author. Address: El LM-CM--bano 5524, Santiago 11, Chile. Fax: +56 (2) 2214030. A eight chip study (two technical replicates) using total RNA recovered from four separate cultures of: Enterococcus faecalis OG1RF (N medium growth), Enterococcus faecalis OG1RF copM-NM-^T mutant strain (N medium growth), Enterococcus faecalis OG1RF copM-NM-^T mutant low copper treatment (N medium growth + 0.05 mM CuSO4) and Enterococcus faecalis OG1RF copM-NM-^T mutant low copper treatment (N medium growth + 0.5 mM CuSO4). Each chip measures the expression level of 3,114 genome genes from Enterococcus faecalis strain V583 (A7980-00-01).
2013-11-12 | E-GEOD-45131 | biostudies-arrayexpress
Project description:Increased c-di-AMP levels allow Staphylococcus aureus growth
in the absence of lipoteichoic acid
| PRJEB2431 | ENA
Project description:In this study, we showed for the first time that c-di-AMP is produced by C. difficile and controls the uptake of potassium, making it essential for growth. We found that c-di-AMP is involved in biofilm formation, cell wall homeostasis, osmotolerance as well as detergent and bile salt resistance in C. difficile. We identified BusR as a new regulator that binds c-di-AMP and represses the expression of the compatible solute transporter BusAA-AB. Interestingly, a busR mutant is highly resistant to a hyperosmotic or bile salt stress compared to the parental strain while a busAA mutant is more susceptible. A short exposure of C. difficile cells to bile salts resulted in a decrease of the c-di-AMP concentrations reinforcing the hypothesis that changes in membrane characteristics due to variations of the cellular turgor or membrane damages constitute a signal for the adjustment of the intracellular c-di-AMP concentration. In a colonization mouse model, a strain producing elevated c-di-AMP concentrations failed to persist in the gut in contrast to the parental strain. Thus, c-di-AMP is a signaling molecule with pleiotropic effects that controls osmolyte uptake to confer osmotolerance and bile salt resistance in C. difficile and that is important for colonization of the host.
2021-12-27 | GSE192529 | GEO
Project description:c-di-GMP and c-di-AMP are important conserved second messenger in bacteria, they play a critical role in a wide range of cellular processes, such as motility, virulence, biofilm formation, cell-cycle progression and cell development, but there are only two c-di-GMP receptors and one c-di-AMP receptors were identified in mycobacteria so far, to identify more c-di-GMP and c-di-AMP receptors we compare the protein expression level of c-di-GMP or c-di-AMP synthesis enzyme overexpression strain with the wild type Mycobacterium smegmatis.
2019-07-03 | PXD010623 | Pride
Project description:Proteomic analysis of the effects of gliotoxin on Enterococcus faecalis.
2023-05-26 | MSV000092038 | MassIVE