The metabolic roles of the endosymbiotic organelles of Toxoplasma and Plasmodium spp.
The metabolic roles of the endosymbiotic organelles of Toxoplasma and Plasmodium spp.
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DOI:
10.1016/j.mib.2013.07.003
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发表时间:
2013-08
影响因子:
5.4
通讯作者:
McFadden GI
中科院分区:
文献类型:
--
作者:
Sheiner L;Vaidya AB;McFadden GI
The apicoplast and the mitochondrion of Apicomplexa cooperate in providing essential metabolites. Their co-evolution during the ancestral acquisition of a plastid and subsequent loss of photosynthesis resulted in divergent metabolic pathways compared with mammals and plants. This is most evident in their chimerical haem synthesis pathway. Toxoplasma and Plasmodium mitochondria operate canonical TCA cycles and electron transport chains, although the roles differ between Toxoplasma tachyzoites and Plasmodium erythrocytic stages. Glutamine catabolism provides TCA intermediates in both parasites. Isoprenoid precursor synthesis is the only essential role of the apicoplast in Plasmodium erythrocytic stages. An apicoplast-located fatty acid synthesis is dispensable in these stages, which instead predominantly salvage fatty acids, while in Plasmodium liver stages and in Toxoplasma tachyzoites fatty acid synthesis is an essential role of the plastid.
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