Dataset Information

Immunoprecipitation of Toxoplasma gondii succinate dehydrogenase complex

ABSTRACT: The apicomplexan parasite Toxoplasma gondii has a divergent mitochondrial electron transport chain (mETC). Succinate dehydrogenase (SDH), the second complex in the mETC and an enzyme in the TCA cycle, has 4 subunits in common model organisms, but Toxoplasma has a 9 subunit SDH complex. We performed immunoprecipitation of SDH, via an HA epitope tagged SDHB subunit, and the unrelated Complex III and analysed the elution via LFQ mass spectrometry, to confirm the composition of the divergent Toxoplasma gondii SDH complex.

INSTRUMENT(S): Q Exactive Plus

ORGANISM(S): Toxoplasma Gondii

SUBMITTER: Andree Maclean

LAB HEAD: Lilach Sheiner

PROVIDER: PXD047027 | Pride | 2023-12-27

REPOSITORIES: pride

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Functional and biochemical characterization of the Toxoplasma gondii succinate dehydrogenase complex.

Silva Mariana F MF Douglas Kiera K Sandalli Sofia S Maclean Andrew E AE Sheiner Lilach L

PLoS pathogens 20231211 12

The mitochondrial electron transport chain (mETC) is a series of membrane embedded enzymatic complexes critical for energy conversion and mitochondrial metabolism. In commonly studied eukaryotes, including humans and animals, complex II, also known as succinate dehydrogenase (SDH), is an essential four-subunit enzyme that acts as an entry point to the mETC, by harvesting electrons from the TCA cycle. Apicomplexa are pathogenic parasites with significant impact on human and animal health. The phy ...[more]

PMID: 38079448

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Project description:The outcome of infections with Toxoplasma gondii in humans is dependent in part on the genetic makeup of the infecting organism. Recent studies have indicated that most infecting Toxoplasma organisms fall into 1 of 3 canonical lineages. Previous studies have investigated the effects of Toxoplasma on its host cell transcriptome. Little is known, however, about the effects of three canonical lineages on brain cells, the principal site of parasite lifelong persistence. In this study, we examined the transcriptional profile of human neuroepithelioma cells in response to T. gondii infection using microarray analysis to characterize the strain-specific host cell response to 3 canonical T. gondii strains. We found that the extent of the expression changes varied considerably among the three strains. Neuroepithelial cells infected with type I exhibited the most differential gene expression, whereas type II infected cells had a substantially smaller number of genes which were differentially expressed. Cells infected with type III exhibited intermediate effects on gene expression. The three strains also differed in the individual genes and gene pathways which were altered following cellular infection. For example, gene ontology (GO) analysis indicated that type I infection largely affects genes related to central nervous system while type III infection largely alters genes which affect nucleotide metabolism; type II infection does not alter expression of a clearly defined set of genes. Moreover, Ingenuity pathway analysis (IPA) revealed the sophistication of different strain in its interactions with the host. These differences may explain some of the variation in the neurobiological effects of different strains of Toxoplasma on infected individuals. We infected SK-N-MC cells with 3 canonical Toxoplasma strains and assessed their gene expression in RNA at 20 hours post-infection using Affymetrix GeneChip. Infections and controls (no tachyzoites) were performed in duplicate and experiments for each strain were carried out on three separate occasions in order to include both technical replicates and biological replicates.

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Dataset Information

Immunoprecipitation of Toxoplasma gondii succinate dehydrogenase complex

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Publications

Functional and biochemical characterization of the Toxoplasma gondii succinate dehydrogenase complex.

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