GEO DataSets

(Submitter supplied) Transcriptional profiling of carolacton-treated Streptococcus mutans biofilm cells in comparison to untreated biofilms in a time series approach.

Organism:

Streptococcus mutans UA159

Type:

Expression profiling by array

Platform:

GPL10540

22 Samples

Download data: TXT

(Submitter supplied) Transcriptional profiling of carolacton treated S. mutans biofilm cells in comparison to untreated biofilms in a time series approach.

Organism:

Streptococcus mutans UA159

Type:

Expression profiling by array

Platform:

GPL10540

24 Samples

Download data: TXT

(Submitter supplied) Transcriptional profiling of carolacton treated S. mutans biofilm cells in comparison to untreated biofilms after 8h of growth.

Organism:

Streptococcus mutans UA159

Type:

Expression profiling by array

Platform:

GPL10540

8 Samples

Download data: TXT

(Submitter supplied) Carolacton is a novel biofilm inhibitor that kills biofilm cells of Streptococcus mutans in nanomolar concentrations. Interestingly, Carolacton also inhibits growth of the clinically relevant and human pathogenic bacterium Streptococcus pneumoniae TIGR4. The cellular target of Carolacton is still unknown. Here, we adressed the differential transcription of cellular RNAs when S. pneumoniae TIGR4 was grown in the presence of Carolacton. more...

Organism:

Streptococcus pneumoniae TIGR4

Type:

Expression profiling by high throughput sequencing

Platform:

GPL21349

36 Samples

Download data: TXT

(Submitter supplied) H2O2 is an oxidative stress agent known to trigger an upregulation in expression of detoxification genes in Streptococcus mutans. Following discovery of a spontaneously-occurring perR mutation, we wanted to compare the transcriptomic responses of H2O2 exposure in S. mutans strains bearing an intact perR or a perR deletion.

Organism:

Streptococcus mutans UA159

Type:

Expression profiling by high throughput sequencing

Platform:

GPL29159

12 Samples

Download data: CSV, XLSX

(Submitter supplied) Carolacton is a novel biofilm inhibitor that kills biofilm cells of Streptococcus mutans and inhibits growth of the clinically relevant and human pathogenic bacterium Streptococcus pneumoniae TIGR4 in nanomolar concentrations. Interestingly, Carolacton also inhibits Escherichia coli with a defective outer membrane protein TolC . The cellular target of Carolacton is still unknown. Here, we adressed the differential transcription of cellular RNAs when E.coli TolC was grown in the presence of Carolacton. more...

Organism:

Escherichia coli

Type:

Expression profiling by high throughput sequencing

Platform:

GPL18133

14 Samples

Download data: FASTA, TXT

(Submitter supplied) Transcriptional analysis of the regulator FabT in S. mutans

Organism:

Streptococcus mutans UA159; Streptococcus mutans

Type:

Expression profiling by array

Platform:

GPL4339

16 Samples

Download data: MEV

(Submitter supplied) Streptococcus mutans, the organism most frequently associated with the development of dental caries, is able to utilize a diverse array of carbohydrates for energy metabolism. One such molecule is trehalose, a disaccharide common in human foods, which has recently been implicated in enhancing the virulence of epidemic strains of the pathogen, Clostridium difficile. In this study, deletion mutants of all three genes in the putative S. more...

Organism:

Streptococcus mutans

Type:

Expression profiling by high throughput sequencing

Platform:

GPL24591

18 Samples

Download data: TXT, XLSX

(Submitter supplied) In this report, codY mutant strains were constructed and used to demonstrate the relationship of (p)ppGpp synthesized by RelP and RelQ with the activation of CodY. In addition, because CodY has not been studied in S. mutans, we used microarrays to demonstrate that this protein function as a global regulator of gene expression in S. mutans. Keywords: stress response, gene knockout analysis

Organism:

Streptococcus mutans

Type:

Expression profiling by array

Platform:

GPL4340

8 Samples

Download data: MEV

(Submitter supplied) In this study we analyzed the transcriptional regulation of the operon (OBio) encoding the PTSBio and showed that it was repressed by NigR, a LacI-like transcriptional regulator. To elucidate the role of NigR in regulation of S. mutans carbohydrate transporters we performed full genome expression microarrays using custom Affymetrix chip. Expression microarray analysis was performed with ΔnigR grown in CDM supplemented with glucose and compared to that of WT grown under identical conditions. more...

Organism:

Streptococcus mutans; Streptococcus mutans UA159

Type:

Expression profiling by array

Platform:

GPL4769

4 Samples

Download data: CEL, CHP

(Submitter supplied) CcpA is a global regulator of transcription in Gram-positive bacteria that controls gene expression in response to carbohydrate availability. Using the fructan hydrolase (fruA) gene of S. mutans as a model, we demonstrate that CcpA does indeed play a major role in carbohydrate catabolite repression. Using DNA microarrays, the expression of at least 170 genes differed in CcpA-deficient cells compared to the parental strains when cells are grown in the presence of glucose, but only 90 genes showed altered expression when cells were cultivated in the poorly-repressing substrate galactose. more...

Organism:

Streptococcus mutans

Type:

Expression profiling by array

Platform:

GPL4340

16 Samples

Download data: MEV

(Submitter supplied) Using DNA-microarrays analysis 39 differentially expressed genes were identified in 200 vs. 100 microns biofilms, which might be associated with thickness of S. mutans biofilm. Using DNA-microarrays analysis 29 differentially expressed genes were identified in 400 vs. 100 microns biofilms of S. mutans.

Organism:

Streptococcus mutans

Type:

Expression profiling by array

Platform:

GPL4745

5 Samples

Download data: GPR

(Submitter supplied) The glucose/mannose-PTS permease EIIMan encoded by manLMN in the dental caries pathogen Streptococcus mutans has a dominant influence on sugar-specific, CcpA-independent catabolite repression (CR). Mutations in manL affect energy metabolism and virulence-associated traits, including biofilm formation, acid tolerance and competence. Using promoter:reporter fusions, expression of the manLMN and the fruRKI operons, encoding a transcriptional regulator, a fructose-1-P kinase and a fructose-PTS permease EIIFru, respectively, was monitored in response to carbohydrate source and in mutants lacking CcpA, FruR, and components of EIIMan. more...

Organism:

Streptococcus mutans

Type:

Expression profiling by high throughput sequencing

Platform:

GPL21130

9 Samples

Download data: XLSX

(Submitter supplied) Multiple S. mutans genes that are subject to SloR control are likely contributors to virulence. The regulation of these genes in response to metal ion limitation vs. availability in the oral cavity can significantly facilitate the caries-forming process and hence continued analysis of these data can reveal novel candidate genes for the purposes of therapeutic intervention and/or prevention. Keywords: Genetic modification, dose response, metalloregulation

Organism:

Streptococcus mutans UA159

Type:

Expression profiling by array

Platform:

GPL6395

10 Samples

Download data: CEL

(Submitter supplied) Dental caries are closely associated with the virulence of Streptococcus mutans. The virulence expression of S. mutans is linked to its stress adaptation to the changes in the oral environment. In this work we used whole-genome microarrays to profile the dynamic transcriptomic responses of S. mutans during physiological heat stress. In addition, we evaluated the phenotypic changes, including initial biofilm formation, acid production and ATP turnover of S. more...

Organism:

Streptococcus mutans UA159

Type:

Expression profiling by array

Platform:

GPL18933

21 Samples

Download data: TXT

(Submitter supplied) Global transcriptional analysis of acid-inducible genes in Streptococcus mutans: multiple two-component systems involved in acid adaptation pH is a major environmental factor that regulates gene expression in many bacteria. Streptococcus mutans in dental biofilms is regularly exposed to cycles of acidic pH during the ingestion of fermentable dietary carbohydrates. The ability of S. mutans to tolerate low pH is crucial for its virulence and the pathogenesis in dental caries. more...

Organism:

Streptococcus mutans UA159; Streptococcus mutans

Type:

Expression profiling by array

Platform:

GPL8255

3 Samples

Download data: TXT

(Submitter supplied) RNA-seq was utilized to compare the transcriptomes of a CRISPRi control strain and a CRISPRi strain targeting/repressing SMU_218

Organism:

Streptococcus mutans

Type:

Expression profiling by high throughput sequencing

Platform:

GPL21130

6 Samples

Download data: TXT

(Submitter supplied) mouse primary BMDCs were stimulated with tlr ligands and gene expression changes were profiled on Affymetrix arrays

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL8759

96 Samples

Download data: CEL