Plasmodium falciparum ATPase type 4 (PfATP4)

Plasmodium falciparum ATPase type 4 (PfATP4) is an essential P-type ATPase localized to the parasite plasma membrane, responsible for maintaining low intracellular sodium levels by actively exporting Na+ in exchange for H+. This activity is vital for parasite homeostasis and survival within the host erythrocyte. PfATP4 is a well-established molecular target for novel antimalarial drugs, many of which show potent parasiticidal activity through inhibition of its Na+ transport function. Drug resistance has been observed via mutations that modify the drug-binding site, requiring continued molecular surveillance and structural characterization. Unlike human Na+/K+-ATPases, PfATP4 is structurally and functionally distinct, which underpins its druggability and therapeutic selectivity.

Other names

PfATP4Plasmodium falciparum P-type ATPase 4P4-ATPase

Inhibition of Na+ efflux pump; drugs bind to PfATP4 and block its catalytic cycle, disrupting Na+ translocation and causing intracellular ionic imbalance, parasite swelling, and death. Induction of sodium overload and pH disruption; leads to osmotic stress, cell swelling, lysis, and rapid antimalarial effect.