Cysteine protease falcipain-2 (FP-2) (FP-2)

Cysteine protease falcipain-2 (FP-2) is a principal cysteine protease of the malaria parasite Plasmodium falciparum, localized within the acidic food vacuole of the trophozoite stage [1]. Its primary biological function is the hydrolysis of host hemoglobin into small peptides, which are subsequently broken down into amino acids required for parasite protein synthesis and osmotic regulation [2]. Additionally, Falcipain-2 contributes to the degradation of the erythrocyte cytoskeleton, aiding in the egress of merozoites from infected red blood cells [3]. As an essential enzyme for parasite survival, it represents a validated therapeutic target for antimalarial drug discovery, particularly against strains resistant to existing treatments like chloroquine [4]. Small molecule inhibitors targeting Falcipain-2 typically mimic the peptide substrate or utilize electrophilic warheads to covalently bind the active site cysteine, effectively halting parasite maturation [2, 4].

Other names

Falcipain-2Trophozoite cysteine proteaseFP2Cysteine proteinase falcipain-2

Inhibition of the cysteine protease activity of Falcipain-2, which prevents the degradation of host hemoglobin in the parasite food vacuole, leading to amino acid starvation and parasite death [1, 2].