Plasmodium falciparum redox metabolism enzymes and mitochondrial electron transport chain components (Pf-RM/mETC)

The Plasmodium falciparum redox metabolism enzymes and mitochondrial electron transport chain (mETC) components are a group of essential proteins that maintain the parasite's physiological balance and biosynthetic capabilities (nih.gov, 1.4.5). A primary function of the mETC in the asexual blood stage is to serve as an electron sink for dihydroorotate dehydrogenase (DHODH), which is indispensable for de novo pyrimidine biosynthesis (nih.gov, 1.1.1, 1.4.4). Because Plasmodium falciparum lacks the ability to salvage pyrimidines from its host, any disruption to this pathway effectively halts DNA and RNA production (intechopen.com, 1.1.3). Key targets within this system include the Cytochrome bc1 complex (Complex III), which is inhibited by the drug atovaquone, and DHODH, which is targeted by newer agents like DSM265 (nih.gov, 1.1.1, 1.4.5). Beyond biosynthesis, these components are vital for maintaining the mitochondrial membrane potential, which is necessary for the import of essential proteins and metabolites (nih.gov, 1.4.4). The redox metabolism enzymes, such as thioredoxin reductase and glutathione reductase, protect the parasite from oxidative damage caused by the degradation of host hemoglobin (mdpi.com, 1.3.3). Drugs targeting these systems exploit the significant structural and functional differences between the parasite's machinery and that of the human host (nih.gov, 1.4.3). However, the clinical utility of these drugs is often threatened by the rapid emergence of resistance mutations, such as those in the cytochrome b gene (intechopen.com, 1.1.3). Overall, this target group represents a cornerstone of current and future antimalarial drug development strategies (nih.gov, 1.2.1).

Other names

Plasmodium falciparum mitochondrial electron transport chainPf-mETCPlasmodium falciparum redox metabolismPf-RMPfETC

Inhibition of mitochondrial electron transport (e.g., Cytochrome bc1 complex) and redox enzymes (e.g., DHODH, TrxR), leading to the disruption of de novo pyrimidine biosynthesis and collapse of the mitochondrial membrane potential (nih.gov, 1.1.1, 1.4.4).