Journal
CELL REPORTS
Volume 30, Issue 11, Pages 3778-+Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2020.02.072
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Funding
- Agence Nationale de la Recherche, France [ANR-12-PDOC-0028]
- Atip-Avenir program (CNRS-INSERM-FinoviAtip-AvenirApicolipid projects)
- Laboratoire d'Excellence Parafrap, France [ANR-11-LABX-0024]
- LIA-IRP CNRS Program (Apicolipid project)
- Finovi program (CNRS-INSERM-FinoviAtip-AvenirApicolipid projects)
- Agence Nationale de la Recherche (ANR) [ANR-12-PDOC-0028] Funding Source: Agence Nationale de la Recherche (ANR)
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Apicomplexan parasites are unicellular eukaryotic pathogens that must obtain and combine lipids from both host cell scavenging and de novo synthesis to maintain parasite propagation and survival within their human host. Major questions on the role and regulation of each lipid source upon fluctuating host nutritional conditions remain unanswered. Characterization of an apicoplast acyltransferase, TgATS2, shows that the apicoplast provides (lyso) phosphatidic acid, required for the recruitment of a critical dynamin (TgDrpC) during parasite cytokinesis. Disruption of TgATS2 also leads parasites to shift metabolic lipid acquisition from de novo synthesis toward host scavenging. We show that both lipid scavenging and de novo synthesis pathways in wild-type parasites exhibit major metabolic and cellular plasticity upon sensing host lipid-deprived environments through concomitant (1) upregulation of de novo fatty acid synthesis capacities in the apicoplast and (2) parasite-driven host remodeling to generate multi-membrane-bound structures from host organelles that are imported toward the parasite.
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