GEO DataSets

(Submitter supplied) The genome of Sinorhizobium meliloti, a model for studying plant-bacteria symbiosis, contains the genes coding for eight LuxR-like proteins. Two of these, SinR and ExpR, are essential for quorum sensing (QS). Roles and regulation surrounding the others are mostly unknown. Here, we reveal the DNA recognition sequence and regulon of the LuxR-like protein SMc00877. Unlike ExpR, which uses the long chain acyl homoserine lactones (AHLs) as inducers, SMc00877 functioned independently of AHLs and was even functional in Escherichia coli. more...

Organism:

Sinorhizobium meliloti

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL26685

2 Samples

Download data: BW

(Submitter supplied) We used microarrays to analyze the effects of the disruption of mucR in planktonic S. meliloti strain Rm8530.

Organism:

Medicago sativa; Medicago truncatula; Sinorhizobium meliloti

Type:

Expression profiling by array

Platform:

GPL4652

6 Samples

Download data: CEL

(Submitter supplied) Bacteria coordinate cellular behaviors using a cell-cell communication system termed quorum sensing. In Vibrio harveyi, the master quorum sensing transcriptional factor LuxR directly regulates >100 genes in response to changes in population density. Here, we show that LuxR derepresses quorum sensing loci by competing with H-NS, a global transcriptional repressor that oligomerizes on DNA to form filaments and bridges. more...

Organism:

Vibrio campbellii

Type:

Expression profiling by high throughput sequencing

Platform:

GPL27117

12 Samples

Download data: TXT

(Submitter supplied) Bacteria coordinate cellular behaviors using a cell-cell communication system termed quorum sensing. In Vibrio harveyi, the master quorum sensing transcriptional factor LuxR directly regulates >100 genes in response to changes in population density. Here, we show that LuxR derepresses quorum sensing loci by competing with H-NS, a global transcriptional repressor that oligomerizes on DNA to form filaments and bridges. more...

Organism:

Vibrio campbellii

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL27117

5 Samples

Download data: TXT

(Submitter supplied) Quorum sensing controls hundreds of genes in vibrios required for cell density-specific behaviors, including bioluminescence, biofilm formation, competence, secretion, and motility. The central regulator in the quorum sensing pathway in vibrios is LuxR/HapR, which directly regulates >100 genes in the 625-gene regulon of Vibrio harveyi. Among these directly regulated genes are 15 transcription factors, which we predicted would comprise the second tier in the hierarchy of the quorum sensing regulon. more...

Organism:

Vibrio campbellii

Type:

Expression profiling by high throughput sequencing

Platform:

GPL27117

30 Samples

Download data: TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

44 Samples

Download data: TXT

(Submitter supplied) Microarray data for study "The master regulators AphA and LuxR control the Vibrio harveyi quorum-sensing regulon: analysis of their individual and combined effects". Bacteria use a chemical communication process called quorum sensing to control transitions between individual and group behaviors. In the Vibrio harveyi quorum-sensing circuit, two master transcription factors AphA and LuxR coordinate the quorum-sensing response. more...

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

8 Samples

Download data: TXT

(Submitter supplied) Microarray data for study "The master regulators AphA and LuxR control the Vibrio harveyi quorum-sensing regulon: analysis of their individual and combined effects". Bacteria use a chemical communication process called quorum sensing to control transitions between individual and group behaviors. In the Vibrio harveyi quorum-sensing circuit, two master transcription factors AphA and LuxR coordinate the quorum-sensing response. more...

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

4 Samples

Download data: TXT

(Submitter supplied) Microarray data for study "The master regulators AphA and LuxR control the Vibrio harveyi quorum-sensing regulon: analysis of their individual and combined effects". Bacteria use a chemical communication process called quorum sensing to control transitions between individual and group behaviors. In the Vibrio harveyi quorum-sensing circuit, two master transcription factors AphA and LuxR coordinate the quorum-sensing response. more...

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

4 Samples

Download data: TXT

(Submitter supplied) Microarray data for study "The master regulators AphA and LuxR control the Vibrio harveyi quorum-sensing regulon: analysis of their individual and combined effects". Bacteria use a chemical communication process called quorum sensing to control transitions between individual and group behaviors. In the Vibrio harveyi quorum-sensing circuit, two master transcription factors AphA and LuxR coordinate the quorum-sensing response. more...

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

4 Samples

Download data: TXT

(Submitter supplied) Microarray data for study "The master regulators AphA and LuxR control the Vibrio harveyi quorum-sensing regulon: analysis of their individual and combined effects". Bacteria use a chemical communication process called quorum sensing to control transitions between individual and group behaviors. In the Vibrio harveyi quorum-sensing circuit, two master transcription factors AphA and LuxR coordinate the quorum-sensing response. more...

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

4 Samples

Download data: TXT

(Submitter supplied) Microarray data for study "The master regulators AphA and LuxR control the Vibrio harveyi quorum-sensing regulon: analysis of their individual and combined effects". Bacteria use a chemical communication process called quorum sensing to control transitions between individual and group behaviors. In the Vibrio harveyi quorum-sensing circuit, two master transcription factors AphA and LuxR coordinate the quorum-sensing response. more...

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

8 Samples

Download data: TXT

(Submitter supplied) Microarray data for study "The master regulators AphA and LuxR control the Vibrio harveyi quorum-sensing regulon: analysis of their individual and combined effects". Bacteria use a chemical communication process called quorum sensing to control transitions between individual and group behaviors. In the Vibrio harveyi quorum-sensing circuit, two master transcription factors AphA and LuxR coordinate the quorum-sensing response. more...

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

8 Samples

Download data: TXT

(Submitter supplied) Microarray data for study "The master regulators AphA and LuxR control the Vibrio harveyi quorum-sensing regulon: analysis of their individual and combined effects". Bacteria use a chemical communication process called quorum sensing to control transitions between individual and group behaviors. In the Vibrio harveyi quorum-sensing circuit, two master transcription factors AphA and LuxR coordinate the quorum-sensing response. more...

Organism:

Vibrio harveyi

Type:

Expression profiling by array

Platform:

GPL16606

4 Samples

Download data: TXT

(Submitter supplied) LuxR is the master quorum sensing regulator in Vibrio harveyi. This transcription factor controls the expression of over 600 genes to coordinate group behaviors. In order to understand how LuxR regulates transcription we identified a co-regulator, integration host factor (IHF). In this study we performed RNA-seq to show that the LuxR and IHF regulons overlap significantly.

Organism:

Vibrio harveyi

Type:

Expression profiling by high throughput sequencing

Platform:

GPL22744

9 Samples

Download data: TXT

(Submitter supplied) In α-proteobacteria, strict regulation of cell cycle progression is necessary for the specific cellular differentiation required for adaptation to diverse environmental niches. The symbiotic lifestyle of Sinorhizobium meliloti requires a drastic cellular differentiation that includes genome amplification. To achieve polyploidy, the S. meliloti cell cycle program must be altered to uncouple DNA replication from cell division. more...

Organism:

Sinorhizobium meliloti 1021; Sinorhizobium meliloti

Type:

Expression profiling by array

Platform:

GPL18182

31 Samples

Download data: TXT

(Submitter supplied) Background: Pantoea ananatis LMG 2665T synthesizes and utilizes acyl homoserine lactones (AHLs) for signaling. In this strain, short chain AHLs (C4 to C8) are produced by the EanI/R quorum sensing (QS) system that is involved in pathogenicity and biofilm formation. The complete set of genes regulated by the EanI/R system in P. ananatis LMG 2665T is still not fully known. In the present study, RNA-seq was used to analyze the transcriptome profiles controlled by the EanI/R system in this strain by comparing the wild type strain and its QS mutant 2665T ean∆I/R during lag and log stages. more...

Organism:

Pantoea ananatis LMG 2665

Type:

Expression profiling by high throughput sequencing

Platform:

GPL22474

12 Samples

Download data: TXT