Plasmodium heme biosynthesis pathway (null)

The Plasmodium heme biosynthesis pathway is a multi-step, compartmentalized metabolic route essential for the synthesis of heme, a prosthetic group vital for cytochromes and electron transport in the malaria parasite[1][3][4][8]. Plasmodium species encode all the enzymes necessary for de novo heme synthesis, localized across the mitochondrion, apicoplast, and cytosol[1][3][8]. During blood-stage infection, the parasite can scavenge heme from digested host hemoglobin and form non-toxic hemozoin crystals to avoid toxicity, making its own de novo pathway dispensable at this stage[4][6][7]. However, during mosquito and liver stages, the pathway is essential for parasite survival and transmission[1][8][6]. Several antimalarial drugs, including chloroquine and artemisinin, interact with heme metabolism, primarily exploiting the parasite's heme detoxification process rather than biosynthesis per se[1][4]. Targeting the pathway remains a strategy for blocking parasite transmission but is not suitable for treating established blood-stage malaria in humans[1][4][6].

Other names

Plasmodium heme biosynthesis pathwayPlasmodium heme metabolic pathwayPlasmodium heme synthesis pathway

Inhibition of heme detoxification - Interference with heme biosynthesis via enzyme inhibition - Accumulation of phototoxic porphyrin intermediates (with 5-aminolevulinic acid)[4][1]