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- W3022746100 startingPage "e0232552" @default.
- W3022746100 abstract "Toxoplasma gondii is an obligate intracellular parasite which is capable of establishing life-long chronic infection in any mammalian host. During the intracellular life cycle, the parasite secretes an array of proteins into the parasitophorous vacuole (PV) where it resides. Specialized organelles called the dense granules secrete GRA proteins that are known to participate in nutrient acquisition, immune evasion, and host cell-cycle manipulation. Although many GRAs have been discovered which are expressed during the acute infection mediated by tachyzoites, little is known about those that participate in the chronic infection mediated by the bradyzoite form of the parasite. In this study, we sought to uncover novel bradyzoite-upregulated GRA proteins using proximity biotinylation, which we previously used to examine the secreted proteome of the tachyzoites. Using a fusion of the bradyzoite upregulated protein MAG1 to BirA* as bait and a strain with improved switch efficiency, we identified a number of novel GRA proteins which are expressed in bradyzoites. After using the CRISPR/Cas9 system to characterize these proteins by gene knockout, we focused on one of these GRAs (GRA55) and found it was important for the establishment or maintenance of cysts in the mouse brain. These findings highlight new components of the GRA proteome of the tissue-cyst life stage of T. gondii and identify potential targets that are important for maintenance of parasite persistence in vivo." @default.
- W3022746100 created "2020-05-13" @default.
- W3022746100 creator A5005240902 @default.
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- W3022746100 date "2020-05-06" @default.
- W3022746100 modified "2023-10-18" @default.
- W3022746100 title "Proximity biotinylation reveals novel secreted dense granule proteins of Toxoplasma gondii bradyzoites" @default.
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- W3022746100 doi "https://doi.org/10.1371/journal.pone.0232552" @default.
- W3022746100 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7202600" @default.
- W3022746100 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32374791" @default.
- W3022746100 hasPublicationYear "2020" @default.
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