Plasmodium falciparum Pfs230 protein (Pfs230)

Plasmodium falciparum Pfs230 protein is the largest member of the parasite's 6-cysteine protein family, with a mature size of over 300 kDa comprised of fourteen consecutive 6-cysteine domains and a non-structured prodomain. The protein is expressed on the surface of sexual-stage parasites (gametocytes and gametes), where it interacts with other proteins such as Pfs48/45 to form complexes critical for gamete fertility and successful transmission to mosquitoes. Pfs230 undergoes cleavage events during gametogenesis, exposing functional domains targeted by transmission-blocking antibodies and nanobodies. Disruption of the Pfs230 gene severely compromises parasite fertility and transmission, making it a prominent target for malaria control strategies through transmission-blocking vaccines. Structural studies reveal that transmission-blocking epitopes are mainly located in the prodomain and domain 1, but recent research highlights additional functional epitopes in other domains, such as domain 7. Production of recombinant Pfs230 for vaccines is challenging due to its size, complexity, and requirement for correct disulfide bonding for proper folding. There are no approved drugs or vaccines targeting Pfs230, but antibody and nanobody-based approaches are in advanced preclinical research.

Other names

Sexual stage 230-kDa proteinGametocyte surface antigen Pfs230Transmission-blocking antigen Pfs230PF3D7_0209000 (gene identifier)

Antibodies and nanobodies bind to various epitopes in Pfs230, interfering with gamete viability and fertilization, thereby blocking transmission from human host to mosquito