Browse
Submit Data
Databases
API
Help

Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

9 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

The Toxoplasma unfolded protein response

ABSTRACT: To characterize the nature of the unfolded protein response in this Toxoplasma, we carried out microarray analyses to measure the changes in the transcriptome and in translational control during ER stress. Total RNA or RNA fractionated into monosomes or polysomes were purified from parasites treated with DMSO or tunicamycin for 1 hour. RNA was processed for microarray analysis using a ToxoGeneChip.

ORGANISM(S): Toxoplasma gondii

SUBMITTER: Ron Wek

PROVIDER: E-GEOD-43722 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Publications

The unfolded protein response in the protozoan parasite Toxoplasma gondii features translational and transcriptional control.

Joyce Bradley R BR Tampaki Zoi Z Kim Kami K Wek Ronald C RC Sullivan William J WJ

Eukaryotic cell 20130510 7

The unfolded protein response (UPR) is an important regulatory network that responds to perturbations in protein homeostasis in the endoplasmic reticulum (ER). In mammalian cells, the UPR features translational and transcriptional mechanisms of gene expression aimed at restoring proteostatic control. A central feature of the UPR is phosphorylation of the α subunit of eukaryotic initiation factor-2 (eIF2) by PERK (EIF2AK3/PEK), which reduces the influx of nascent proteins into the ER by lowering ...[more]

PMID: 23666622

Similar Datasets

Expression data from Toxoplasma gondii mutants and wild-type during bradyzoite differentiation in vitro

Project description:Toxoplasma gondii pathogenesis includes the invasion of host cells by extracellular parasites (tachyzoites), replication of intracellular tachyzoites, and differentiation to a latent bradyzoite stage. Whole genome expression profiling was carried out using the newly developed Affymetrix ToxoGeneChip (GeneChip Tgondiia520372) in order to analyze the ~8,000 predicted genes in the T. gondii genome of mutants and wild-type, allowing for full-scale expression profiling during bradyzoite differentiation in vitro. RNA from mutant and wild-type parasites was extracted and hybridized to the ToxoGeneChip. We harvested extracellular tachyzoites from freshly lysed fibroblasts (ET, 0h), intracellular tachyzoites (IT, 24h post-invasion) and parasites subjected to bradyzoite growth conditions for 72h (B72, 72h of induction). Extracellular parasites from freshly lysed fibroblasts were harvested for the seven mutant parasite lines (12K, 13P, B7, 11P, 11K, 7K and P11) and mutant parasites subjected to bradyzoite differentiation conditions for 72h. For a few samples we also harvested parasites 11h post egress of host cells. A time course was carried out with wild-type: parasites subjected to bradyzoite growth conditions for 24h, 36h and 48h.

2010-07-27 | E-GEOD-23174 | biostudies-arrayexpress

Expression QTL mapping of Toxoplasma gondii genes

Project description:This SuperSeries is composed of the following subset Series: GSE11437: Expression QTL mapping of Toxoplasma gondii genes, Bradyzoite array GSE11514: Expression QTL mapping of Toxoplasma gondii genes, Tachyzoite array Keywords: SuperSeries Refer to individual Series

2008-05-22 | E-GEOD-11515 | biostudies-arrayexpress

Expression QTL mapping of Toxoplasma gondii genes, Bradyzoite array

Project description:Toxoplasma gondii is an intracellular parasite with a significant impact on human health, especially in cases where individuals are immunocompromised (e.g., due to HIV/AIDS). In Europe and North America only a few clonal genotypes appear to be responsible for the vast majority of Toxoplasma infections, and these clonotypes have been intensely studied to identify strain-specific phenotypes that may play a role in the manifestation of more severe disease. To identify and genetically map strain-specific differences in gene expression, we have carried out expression quantitative trait locus (eQTL) analysis on Toxoplasma gene expression phenotypes using spotted cDNA microarrays. This led to the identification of 16 Toxoplasma genes that had significant and mappable strain-specific variation in hybridization intensity. While the analysis should identify both cis and trans-mapping hybridization profiles, we only identified loci with strain-specific hybridization differences that are most likely due to differences in the locus itself (i.e., cis-mapping). Interestingly, a larger number of these cis-mapping genes than would be expected by chance encode either confirmed or predicted secreted proteins, many of which are known to localize to the specialized secretory organelles characteristic of members of the phylum Apicomplexa. For 6 of the cis-mapping loci we determined if the strain-specific hybridization differences were due to true transcriptional differences or rather strain-specific differences in hybridization efficiency because of extreme polymorphism and/or deletion, and we found examples of both scenarios. Keywords: eQTL mapping; virulence; Toxoplasma gondii 17 F1 progeny from a cross between a type II parent (PDS) and a type III parent (CTG) were used in RNA hybridizations to identify cis and trans-mapping loci regulating gene expression

2008-05-22 | E-GEOD-11437 | biostudies-arrayexpress

Expression QTL mapping of Toxoplasma gondii genes, Tachyzoite array

Project description:Toxoplasma gondii is an intracellular parasite with a significant impact on human health, especially in cases where individuals are immunocompromised (e.g., due to HIV/AIDS). In Europe and North America only a few clonal genotypes appear to be responsible for the vast majority of Toxoplasma infections, and these clonotypes have been intensely studied to identify strain-specific phenotypes that may play a role in the manifestation of more severe disease. To identify and genetically map strain-specific differences in gene expression, we have carried out expression quantitative trait locus (eQTL) analysis on Toxoplasma gene expression phenotypes using spotted cDNA microarrays. This led to the identification of 16 Toxoplasma genes that had significant and mappable strain-specific variation in hybridization intensity. While the analysis should identify both cis and trans-mapping hybridization profiles, we only identified loci with strain-specific hybridization differences that are most likely due to differences in the locus itself (i.e., cis-mapping). Interestingly, a larger number of these cis-mapping genes than would be expected by chance encode either confirmed or predicted secreted proteins, many of which are known to localize to the specialized secretory organelles characteristic of members of the phylum Apicomplexa. For 6 of the cis-mapping loci we determined if the strain-specific hybridization differences were due to true transcriptional differences or rather strain-specific differences in hybridization efficiency because of extreme polymorphism and/or deletion, and we found examples of both scenarios. Keywords: eQTL mapping; virulence; Toxoplasma gondii 19 F1 progeny from a cross between a type II parent (PDS) and a type III parent (CTG) were used in RNA hybridizations to identify cis and trans-mapping loci regulating gene expression

2008-05-22 | E-GEOD-11514 | biostudies-arrayexpress

Genomic hybridizations for the parents and progeny of the Toxoplasma gondii I X III genetic cross

Project description:The parents and progeny of the I X III genetic cross were genotyped using the ToxoGeneChip in order to generate a more detailed genetic map. We also used the genomic hybridization data to look for copy number variations (CNV) and segmental duplications. The ToxoGeneChip microarray (http://ancillary.toxodb.org/docs/Array-Tutorial.html) was used to hybridize genomic DNA for the parents and progeny of the I X III cross. The parents of the cross are CTGara and GT1-Fudr. The rest comprise the 34 informative progeny.

2012-01-11 | E-GEOD-26607 | biostudies-arrayexpress

polysome-IP profiling experiment : Polysomes of untreated or tunicamycin-treated AC16 cells were immunoprecipitated with anti-MRPS15 antibody, followed by RNA sequencing

Project description:Polysomes of untreated (NT) or tunicamycin-treated (TM) human cardiomyocyte AC16 cells were immunoprecipitated (IP MRPS15) with anti-MRPS15 antibody, followed by RNA sequencing. As a control, RNAseq was performed on polysome-associated RNAs of untreated or tunicamycin-treated human cardiomyocyte AC16 cells before immunoprecipitation (input).

2024-04-01 | E-MTAB-13915 | biostudies-arrayexpress

Toxoplasma gondii RNASeq

Project description:Recent advances in high throughput sequencing methodologies allow the opportunity to probe in depth the transcriptomes of organisms including N. caninum and Toxoplasma gondii. In this project, we are using Illumina sequencing technology to analyze the transcriptome (RNA-Seq) of experimentally accessible stages (e.g. tachyzoites at different times points) of T. gondii VEG strain. The aim is to make comparative transcriptional landscape maps of Neospora and Toxoplasma at different time points at different life cycle stages and compare levels of expression of orthologous genes in these two organisms.

2011-02-08 | E-MTAB-550 | biostudies-arrayexpress

The Toxoplasma unfolded protein response

Project description:To characterize the nature of the unfolded protein response in this Toxoplasma, we carried out microarray analyses to measure the changes in the transcriptome and in translational control during ER stress.

2013-05-24 | GSE43722 | GEO

Expression data from Toxoplasma gondii mutants and wild-type during bradyzoite differentiation in vitro

2010-07-27 | GSE23174 | GEO

The Sex-Specific Changes in Gene Expression and Behavior Induced by Chronic Toxoplasma Infection in Mice

Project description:The goal of this study was to identify the neural systems that underlie the behavorial changes in intermediate hosts of Toxoplasma gondii. Using a mouse whole genome microarray, we analyzed gene expression in the frontal cortex during the latent stages of infection. We found marked sex-dependent effects on gene transcription in mice. In female mice, Toxoplasma infection altered the expression of genes involved in the development of the forebrain, neurogenesis, sensory and motor coordination. In male mice, infection led mainly to modulation of genes associated with olfaction. Our results indicate that the gender of the host plays a major role in determining variable brain changes following Toxoplasma infection. Male and female BALB/c mice (infected female: n=5; infected male: n=5; female control: n=5; male control: n=4) were used in this study. They were sacrificed approximately 6 month post infection and the frontal cortices harvested. RNA transcript levels were quantified by microarray analyses using Illumina Mouse Ref-8 v2.0 Expression BeadChips.

2014-07-28 | E-GEOD-31207 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data