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Expression data from Pseudomonas aeruginosa PAO1 and an isogenic HCN negative mutant (PAO6344), grown under cyanogenic conditions.

ABSTRACT: Pseudomonas aeruginosa produces the toxic secondary metabolite hydrogen cyanide (HCN) at high cell population densities and low aeration. We have used Affimetrix microarrays to investigate the impact of HCN as a signal in cell-cell communication by comparing the transcriptome of the wild-type strain PAO1 to that of an HCN-negative mutant (PAO6344) under cyanogenic conditions.

ORGANISM(S): Pseudomonas aeruginosa Pseudomonas aeruginosa PAO1

PROVIDER: GSE48587 | GEO | 2013/09/16

SECONDARY ACCESSION(S): PRJNA210758

REPOSITORIES: GEO

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Expression data from Pseudomonas aeruginosa PAO1 and an isogenic HCN negative mutant (PAO6344), grown under cyanogenic conditions.

Project description:Pseudomonas aeruginosa produces the toxic secondary metabolite hydrogen cyanide (HCN) at high cell population densities and low aeration. We have used Affimetrix microarrays to investigate the impact of HCN as a signal in cell-cell communication by comparing the transcriptome of the wild-type strain PAO1 to that of an HCN-negative mutant (PAO6344) under cyanogenic conditions. Total RNA was extracted from cultures of the wild-type strain PAO1 as well as from the isogenic HCN negative mutant (PAO6344), when HCN production was maximal (i.e. end of exponential growth phase). Each RNA pool derived from 3 technical replicates. 1 biological replicate per strain was performed on a different day.

2013-09-16 | E-GEOD-48587 | biostudies-arrayexpress

Expression data from Pseudomonas aeruginosa PAO1 and an isogenic HCN negative mutant (PAO6344), grown under cyanogenic conditions.

Project description:Expression data from Pseudomonas aeruginosa PAO1 and an isogenic HCN negative mutant (PAO6344), grown under cyanogenic conditions.

| PRJNA210758 | ENA

Expression data of the mouse heart of a nose-only HCN inhalation model and a subcutaneous KCN injection model

Project description:Smoke inhalation from a structure fire is a common route of cyanide poisoning in the U.S. Cyanide inhibits cellular respiration, often leading to death. Its rapid distribution throughout the body can result in injuries to multiple organs, and cyanide victims were reported to experience myocardial infarction and other cardiac complications. We performed oligonucleotide microarrays to establish cardiac transcriptomes of an animal model of nose-only inhalation exposure to hydrogen cyanide (HCN), which is relevant to smoke inhalation. We also profiled cardiac transcriptomes after subcutaneous injection of potassium cyanide (KCN). Although the KCN injection model has been often used to evaluate medical countermeasures, this study demonstrated that cardiac transcriptomes are largely different from that of the HCN inhalation model at multiple time points within 24 hours after exposure.

2021-11-02 | GSE158994 | GEO

HCN regulates cellular processes through posttranslational modification of proteins by S-cyanylation

Project description:Hydrogen cyanide (HCN) is coproduced with ethylene in plant cells and primarily enzymatically detoxified by the mitochondrial ß-cyanoalanine synthase (CAS-C1). Permanent or transient depletion of CAS-C1 activity in Arabidopsis results in physiological alterations in the plant that suggest that the function of HCN is a gasotransmitter molecule. Label-free quantitative proteomic analysis of enriched mitochondrial samples isolated from the wild type and cas-c1 mutant revealed significant changes in protein content, identifying 451 proteins that are absent or less abundant in cas-c1 and 353 proteins that are only present or more abundant in the mutant background. Gene ontology classification of these proteins highlights proteomic changes that explains the root hairless phenotype and the altered immune response observed in the cas-c1 mutant. The mechanism of action of cyanide as a signaling molecule has been addressed using two proteomic approaches focused on identifying the S-cyanylation of cysteine as a posttranslational modification of proteins. Both the 2-imino-thiazolidine chemical method and the direct untargeted analysis of proteins using LC-MS/MS identified a set of 163 proteins susceptible to S-cyanylation that included sedoheptulose 1, 7-bisphosphatase (SBPase), the peptidyl-prolyl cis-trans isomerase (CYP20-3) and enolase 2 (ENO2). In vitro analysis of these proteins identified that this modification in the SBPase Cys74, CYP20-3 Cys259 and ENO2 Cys346 residues affected the enzymatic activity of the enzymes. GO classification and protein-protein interaction cluster analysis revealed the function of S-cyanylation in the regulation of primary metabolic pathways, such as glycolysis, and the Calvin and S-adenosylmethionine cycles.

2019-01-09 | PXD009929 | Pride

DNA methylation patterns associated with cyanogenic cassava exposure and konzo in Sub-Saharan Africa

Project description:Konzo, a disease characterized by sudden, irreversible spastic paraparesis, affecting up to 10% of the population in some regions of Sub-Saharan Africa during outbreaks and is strongly associated with dietary exposure to cyanogenic bitter cassava. The molecular mechanisms underlying the development of konzo, remain largely unknown. Here, through an analysis of 16 individuals with konzo and matched healthy controls from the same outbreak zones, we identified 117 differentially methylated loci involved in numerous biological processes that may identify cyanogenic- sensitive regions of the genome, providing the first study of epigenomic alterations associated with sub-lethal cyanide exposure and a clinical phenotype.

2022-12-31 | GSE180119 | GEO

scRNA-seq analysis (well-based) of pharmacological HCN channel block with ZD7288 on rat primary cortical neuronal stem cells

Project description:We analysed transcriptomic changes of single cell transcriptomes from primary rat cortical neuronal stem cells (NSC) after pharmacologically blocking HCN channels with ZD7288 compared to untreated NSC. This well-based scRNA-seq aproach revealed a pronounced cell cycle arrest in G1 phase of ZD7288 treated (HCN blocked) NSC.

2021-08-13 | GSE181972 | GEO

scRNA-seq analysis (drop-seq) of pharmacological HCN channel block with ZD7288 on rat primary cortical neuronal stem cells

Project description:We analysed transcriptomic changes of single cell transcriptomes from primary rat cortical neuronal stem cells (NSC) after pharmacologically blocking HCN channels with ZD7288 compared to untreated NSC. This drop-seq scRNA-seq aproach showed accumulation of ZD7288 treated cells in G1 phase and confirmed our previous findings from a well-based scRNA-seq approach with cell cycle arrest in G1 after HCN channel block.

2021-08-13 | GSE181979 | GEO

P. aeruginosa PAO1 WT and PA2663 biofilm cells

Project description:P. aeruginosa PAO1 PA2663-UW expression in biofilm cells relative to P. aeruginosa PAO1 WT-UW expression in biofilm cells. All samples cultured in LB with glass wool. Keywords: Mutation

2008-05-29 | GSE7968 | GEO

Genome-wide sequencing of REST binding (ChIP-seq) in adult hippocampal neural stem cells in vitro a.k.a. HCN cells in quiescent (iQNP) and proliferative (TAP) conditions

Project description:We report the high-throughput profiling of REST binding in mammalian adult hippocampal stem cells in culture (HCN cells). By obtaining 33 to 38 million single-end reads of sequence from chromatin immunoprecipitated DNA, we generated genome-wide REST binding state of HCN cells in induced quiescent (iQNP) and proliferating (TAP) conditions. Thereafter, we annotated the peaks to genomic regions and associated genes. We find that with +/-10kb of transcription start site of genes, REST efficiently binds neuronal genes and represses them in HCN cells in both iQNP and TAP conditions. Moreover, only in the iQNP REST also binds non-neuronal genes like DNA replication genes. This study reveals that in addition to its well known function as a neuronal repressor in non-neuronal tissue, REST can also play other diverse roles in non-neuronal tissues.

2016-11-09 | GSE70695 | GEO

Genome wide transcriptome analysis (RNA-seq) of adult hippocampal neural stem cells in vitro a.k.a. HCN cells in quiescent and proliferative conditions in non-electroporated or electroporated with control empty vector or REST knock-down shRNA vector

Project description:We report the high-throughput transcriptome profiling of induced quiescent (iQNP) and proliferative (TAP) conditions in mammalian adult hippocampal stem cells in culture (HCN cells). By obtaining 145 to 78 million pair-end reads of sequence from isolated RNA from HCN cells in iQNP and TAP conditions. Thereafter, we intersected this gene expression data with REST bound ChIP-seq peaks within +/-10kb of transcription start site of genes also from HCN cells in iQNP and TAP conditions. We find that with +/-10kb of transcription start site of genes, REST efficiently binds neuronal genes and represses them in HCN cells in both iQNP and TAP conditions. Moreover, only in the iQNP REST also binds non-neuronal genes like DNA replication genes. We also report the high-throughput transcriptome profiling of iQNP and TAP condition HCN cells electroporated with a control empty vector or REST knock-down shRNA vector. By obtaining 145 to 78 million pair-end reads of sequence from isolated RNA from HCN cells in electroporated control empty vector or REST knock-down vector in iQNP and TAP conditions. In REST knockdown in iQNP and TAP conditions we found that predominantly non-neuronal genes and neuronal genes were derepressed. This study reveals that in addition to its well known function as a neuronal repressor in non-neuronal tissue, REST can also play other diverse roles in non-neuronal tissues.

2016-11-09 | GSE70696 | GEO

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