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• W2806323811 abstract "Successful inter-host transmission of most apicomplexan parasites requires the formation of infective sporozoites within the oocysts. Unlike all other infective stages that are strictly intracellular and depend on host resources, the sporozoite stage develops outside the host cells, but little is known about its self-governing metabolism. This study deployed Eimeria falciformis, a parasite infecting the mouse as its natural host, to investigate the process of phospholipid biogenesis in sporozoites. Lipidomic analyses demonstrated the occurrence of prototypical phospholipids along with abundant expression of at least two exclusive lipids, phosphatidylthreonine (PtdThr) and inositol phosphorylceramide with a phytosphingosine backbone, in sporozoites. To produce them de novo, the parasite harbors nearly the entire biogenesis network, which is an evolutionary mosaic of eukaryotic-type and prokaryotic-type enzymes. Notably, many have no phylogenetic counterpart or functional equivalent in the mammalian host. Using Toxoplasma gondii as a gene-tractable surrogate to examine Eimeria enzymes, we show a highly compartmentalized network of lipid synthesis spread primarily in the apicoplast, endoplasmic reticulum, mitochondrion, and Golgi complex. Likewise, trans-genera complementation of a Toxoplasma mutant with the PtdThr synthase from Eimeria reveals a convergent role of PtdThr in fostering the lytic cycle of coccidian parasites. Taken together, our work establishes a model of autonomous membrane biogenesis involving significant inter-organelle cooperation and lipid trafficking in sporozoites. Phylogenetic divergence of certain pathways offers attractive drug targets to block the sporulation and subsequent transmission. Not least, our results vindicate the possession of an entire de novo lipid synthesis network in a representative protist adapted to an obligate intracellular parasitic lifestyle." @default.
• W2806323811 created "2018-06-13" @default.
• W2806323811 creator A5000426837 @default.
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• W2806323811 creator A5055026890 @default.
• W2806323811 creator A5055147427 @default.
• W2806323811 creator A5078849410 @default.
• W2806323811 date "2018-05-22" @default.
• W2806323811 modified "2023-10-10" @default.
• W2806323811 title "Lipid analysis of Eimeria sporozoites reveals exclusive phospholipids, a phylogenetic mosaic of endogenous synthesis, and a host-independent lifestyle" @default.
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• W2806323811 doi "https://doi.org/10.1038/s41421-018-0023-4" @default.
• W2806323811 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5964319" @default.
• W2806323811 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29844921" @default.
• W2806323811 hasPublicationYear "2018" @default.
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