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Synechocystis sp. PCC 6803

ABSTRACT: Global Changes in the Transcriptome of Synechocystis sp. Strain PCC 6803 in Response to Ethylene

PROVIDER: PRJNA361291 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5176531.fastq.gz	Fastqsanger.gz
	SRR5176532.fastq.gz	Fastqsanger.gz
	SRR5176533.fastq.gz	Fastqsanger.gz
	SRR5176534.fastq.gz	Fastqsanger.gz
	SRR5176535.fastq.gz	Fastqsanger.gz

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Ethylene production in Synechocystis sp. PCC 6803 promotes phototactic movement

Project description:Ethylene is a gaseous signal sensed by plants and bacteria. Heterologous expression of the ethylene-forming enzyme (EFE) from Pseudomonas syringae in cyanobacteria leads to the production of ethylene under photoautotrophic conditions. The recent characterization of an ethylene responsive signaling pathway affecting phototaxis in the cyanobacterium Synechocystis sp. PCC 6803 implies that biotechnologically relevant ethylene synthesis may induce regulatory processes which are not related to changes in the metabolism. Here we provide data that endogenously produced ethylene accelerates movement of cells towards light. Microarray analysis demonstrates that ethylene deactivates transcription from the csiR1/lsiR promoter which is under control of the two-component system consisting of the ethylene and UV-A-sensing histidine kinase UirS and the DNA-binding response regulator UirR. Surprisingly, only very few other transcriptional changes were detected in the microarray analysis providing no direct hints to possible bottlenecks in phototrophic ethylene production.

2017-10-26 | GSE102251 | GEO

Synechocystis sp. PCC 6803 trophic condition

Project description:Targeted proteome analysis of Synechocystis sp. PCC 6803 under photoautotrophic and mixotrophic conditions

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Synechocystis sp. PCC 6803

Project description:Ethylene production in Synechocystis sp. PCC 6803 promotes phototactic movement

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Synechocystis sp. PCC 6803

Project description:Synechocystis sp PCC 6803 Project

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RNAseq Analysis of Artificial Genome Relaxation in Synechocystis sp. PCC 6803

Project description:In cyanobacteria DNA supercoiling varies over the diurnal light/dark cycle and is integrated with temporal programs of transcription and replication. We manipulated DNA supercoiling in Synechocystis sp. PCC 6803 by CRISPRi-based knockdown of gyrase subunits gyrA, gyrB and overexpression of topoisomerase I (TopoI) topA and analyzed the transcriptional response to gyrase knock-downs (endpoint in triplicate) and topoisomerase I overexpression (endpoint in triplicate, and 19 time points time series before and after induction) in Synechocystis sp. PCC 6803 via RNA-seq of coding RNA. In detail, Illumina Ribo-Zero Plus rRNA Depletion Kit was used to remove the ribosomal RNA molecules from the isolated total RNA. Removal of rRNA was evaluated with the RNA Pico 6000 kit on the Agilent 2100 Bioanalyzer. RNA was free of detectable rRNA. Preparation of cDNA libraries was performed according to the manufacturer’s instructions for the TruSeq stranded mRNA kit (Illumina, San Diego, CA, United States). Subsequently, each cDNA library was sequenced on an Illumina NextSeq 500 system (2 x 75 nt PE high output v2.5).

2021-12-06 | E-MTAB-10949 | biostudies-arrayexpress

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Project description:Synechocystis sp. PCC 6803 response to inorganic carbon limitation

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The role of the Synechocystis sp. PCC 6803 homolog of the circadian clock output regulator RpaA in day-night transitions

Project description:Like many other organisms, cyanobacteria exhibit rhythmic gene expression with a period length of 24 hours to adapt to daily environmental changes. In the model organism Synechococcus elongatus PCC 7942 the central oscillator consists of three proteins: KaiA, KaiB and KaiC and utilizes the histidine kinase SasA and its response regulator RpaA as output-signaling pathway. Synechocystis sp. PCC 6803 contains two additional homologs of the kaiB and kaiC genes. Here we demonstrate that RpaA interacts with the core oscillator KaiAB1C1 of Synechocystis sp. PCC 6803 via SasA, similar to Synechococcus elongatus PCC 7942. However, interaction with the additional Kai homologs was not detected, suggesting different signal transduction components for the clock homologs. Inactivation of rpaA in Synechocystis sp. PCC 6803, lead to reduced viability of the mutant in light-dark cycles that aggravated under mixotrophic growth conditions. Chemoheterotrophic growth in the dark was abolished completely. In accordance, transcriptomic data revealed that RpaA is involved in the regulation of genes related to CO2‑acclimation and carbon metabolism under diurnal light conditions. Further, our results indicate that RpaA functions in the posttranslational regulation of glycogen metabolism as well, and a potential link between the circadian clock and motility was identified.

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