GEO DataSets

(Submitter supplied) The gene ssr3341 was previously suggested to encode an orthologue of the RNA chaperone Hfq in Synechocystis sp. strain PCC 6803. When a phototactic strain of this cyanobacterium was insertionally inactivated at ssr3341, the mutants were not transformable, and were rendered non-phototactic compared to the wild type. The loss of motility was complemented by re-introduction of the wild-type gene, correlated with the re-establishment of type IV pili on the cell surface. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL6546

8 Samples

Download data: TXT

(Submitter supplied) 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. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL15867

8 Samples

Download data: TXT

(Submitter supplied) Microarray analysis demonstrated that the expression levels of minor pilin genes change in response to surface contact. A total of 120 genes were determined to have altered transcription between planktonic and surface growth in this analysis. Among these genes, 13 are located on the pSYSM plasmid, and some are newly predicted minor pilin genes.

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL23938

8 Samples

Download data: TXT

(Submitter supplied) We have investigated the response of the cyanobacterium Synechocystis sp. PCC 6803 during growth at very low O2 concentration (bubbled with 99.9% N2/0.1% CO2). Significant transcriptional changes upon low O2 incubation included up-regulation of a cluster of genes that contained psbA1 and an operon that includes a gene encoding the two-component regulatory histidine kinase, Hik31. This regulatory cluster is of particular interest, since there are virtually identical copies on both the chromosome and on plasmid pSYSX. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL11088

12 Samples

Download data: TXT

(Submitter supplied) Adjustment of gene expression during acclimation to stress conditions, such as bright light, in the cyanobacterium Synechocystis sp. PCC 6803 depends on four group 2 σ factors (SigB, SigC, SigD, SigE). A ∆sigCDE strain containing the stress responsive SigB as an only functional group 2 σ factor appears twice as resistant to photoinhibition of photosystem II (PSII) as the control strain. Microarray analyzes of the ∆sigCDE strain indicated that 77 genes in standard conditions and 79 genes in high light were differently expressed compared to the control strain. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL17595

13 Samples

Download data: TXT

(Submitter supplied) Comparison of gene expression of WT Synechocystis cells with cells overexpressing the sRNA PsrR1 in order to detect direct targets of the sRNA PsrR1.

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL15867

10 Samples

Download data: TXT

(Submitter supplied) Analysis of genome-wide gene expression patterns in response to copper in WT and COPR mutant in the cyanobacterium Synechocystis sp PCC 6803. Here we have used microarrays to interrogate the global responses to copper additions at non-toxic (0.3 micromolar) and toxic concentrations (3 micromolar) of copper in WT and in a mutant in the copR gene. Addition of the non-toxic copper concentration stimulated the metabolism and induced the switch in the use from cyitochrome c6 to plastocyanin. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL17790

16 Samples

Download data: TXT

(Submitter supplied) The unicellular cyanobacterium Synechocystis sp. PCC 6803 is a model system for studying biochemistry, genetics and molecular biology of photobiological processes. Despite its importance in basic and applied research, the genome-wide picture of transcriptional regulation in this bacterium is limited. Characteristic transcriptional responses to changes in the growth environment are expected to provide a scaffold for describing the Synechocystis transcriptional regulatory network as well as efficient means for functional annotation of genes in the genome. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Dataset:

GDS3745

Platform:

GPL7016

27 Samples

Download data: GPR

Analysis of cyanobacterium cultures grown under sulfur starvation conditions for up to 72 hrs. During S limitation, production of hydrogen, a clean and sustainable energy carrier, increases substantially. Results provide insight into gene expression changes during the transition to S starvation.

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array, log2 ratio, 3 stress, 11 time sets

Platform:

GPL7016

Series:

GSE11970

27 Samples

Download data: GPR

(Submitter supplied) In contrast to Synechococcus elongatus PCC 7942, which has been the model cyanobacterium for the study of the prokaryotic circadian clock for more than 20 years, only few data exist on the circadian behaviour of the widely used cyanobacterium Synechocystis sp. PCC 6803. The standard kaiABC operon present in this organism was shown to encode a functional KaiC protein which interacts with KaiA, similar to the Synechococcus elongatus PCC 7942 clock. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL15867

12 Samples

Download data: TXT

(Submitter supplied) The acquisition and assimilation of inorganic carbon (Ci) represents the largest flux of inorganic matter in photosynthetic organisms, and, hence it is tightly controlled. We studied the Ci-dependent transcriptional and metabolic regulation in the Synechocystis sp. PCC 6803 wild type compared to a DndhR mutant that is defective in the main transcriptional repressor for Ci acquisition genes, NdhR (CcmR). more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL15867

13 Samples

Download data: TXT

(Submitter supplied) RNA samples from cells collected at twenty four time points in 48-hours diurnal cycles were analyzed, and they compared between each other for transcriptional profiles of global genes

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL21668

24 Samples

Download data: TXT

(Submitter supplied) Acclimation to low CO2 conditions in cyanobacteria involves the coordinated regulation of genes mainly encoding components of the carbon concentration mechanism (CCM). Making use of several independent microarray datasets a core set of CO2-regulated genes was defined for the model strain Synechocystis sp. PCC 6803. On the transcriptional level, the CCM is mainly regulated by the well-characterized transcriptional regulators NdhR and CmpR, whereas the role of an additional regulatory protein, namely cyAbrB2 belonging to the widely distributed AbrB regulator family that was originally characterized in the genus Bacillus, is less defined. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL15867

16 Samples

Download data: TXT

(Submitter supplied) Every cyanobacterial species contains gene encoding site-2-protease (S2P) homolog. The studied prokaryotic S2P homologs play essential roles in regulating stress response through intramembrane proteolysis of membrane-bound anti-sigma factors. Here, gene of Slr0643, one of four S2P homologs in Synechocystis sp. PCC 6803, was insertionally disrupted to explore its physiological role. Only a partially segregated mutant was obtained, indicating its indispensability for growth. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL15530

24 Samples

Download data: XLS

(Submitter supplied) The model cyanobacterium Synechocystis sp. PCC 6803 was used for a systematic survey of differential expression with a focus on antisense (as)RNAs and non-coding (nc)RNAs. A microarray was constucted with on average 5 probes for each transcript known thus far, including ncRNAs and asRNAs. The resulting 20,431 individual probes are duplicated on the array (Agilent 4x44k custom array) representing a technical replicate. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array; Non-coding RNA profiling by array

Dataset:

GDS3744

Platform:

GPL8567

12 Samples

Download data: TXT

(Submitter supplied) The model cyanobacterium Synechocystis sp. PCC 6803 was used for a systematic survey on the number and types of antisense (as)RNAs. A tiled microarray was constructed with probes for both strands of the genes or intergenic spacers with candidate transcripts predicted by an algorithm and an equally sized and distributed control set. The resulting 102,739 individual probes cover an accumulated length of 1,441,146 nt or about 40% of the total chromosome sequence of Synechocystis 6803. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by genome tiling array; Non-coding RNA profiling by genome tiling array

Platform:

GPL8071

4 Samples

Download data: TXT

Analysis of cyanobacterium cultures subjected to various stressful growth conditions: CO2 depletion, dark, and high light. Results provide insight into molecular mechanisms, including antisense (as)RNAs and non-coding (nc)RNAs, underlying cyanobacteria adaptation to various stresses.

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array, count, 4 stress sets

Platform:

GPL8567

Series:

GSE16162

12 Samples

Download data: TXT

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

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL21131

36 Samples

Download data: TXT

(Submitter supplied) Gene expression changes were followed in cultures of the cyanobacterium Synechocystis sp. PCC 6803 three and 24 hours after shift from high carbon (HC) to low carbon (LC) concentrations. The acclimation to fluctuating inorganic carbon (Ci) concentrations is crucial for photoautotrophic organisms living in aquatic environments such as cyanobacteria. The PII-like regulator protein SbtB binds the second messengers cAMP or c-diAMP and is involved in the acclimation to LC. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL21131

12 Samples

Download data: TXT

(Submitter supplied) Gene expression changes were followed in cultures of the cyanobacterium Synechocystis sp. PCC 6803 three and 24 hours after shift from high carbon (HC) to low carbon (LC) concentrations. The acclimation to fluctuating inorganic carbon (Ci) concentrations is crucial for photoautotrophic organisms living in aquatic environments such as cyanobacteria. The PII-like regulator protein SbtB binds the second messengers cAMP or c-diAMP and is involved in the acclimation to LC. more...

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL21131

12 Samples

Download data: TXT