Gametocyte surface protein Pfs230 (domain 1) (Pfs230D1)

Plasmodium falciparum Pfs230 is a large, 230-363 kDa surface protein expressed during the sexual stages (gametocytes and gametes) of the malaria parasite. It is a member of the 6-cysteine protein family and plays a vital role in the fertilization process within the mosquito midgut by forming a complex with Pfs48/45 to facilitate the interaction between male and female gametes. Pfs230 domain 1 (Pfs230D1) is the N-terminal domain of this protein and is the primary target for transmission-blocking vaccine (TBV) development due to its high immunogenicity and the presence of potent transmission-blocking epitopes. Vaccines targeting Pfs230D1, such as Pfs230D1-EPA, work by inducing antibodies in the human host that are subsequently taken up by the Anopheles mosquito during a blood meal. These antibodies interfere with the parasite's life cycle in the vector, preventing the formation of oocysts and thereby halting the transmission of malaria to the next human host. Clinical evaluations have demonstrated that Pfs230D1-based vaccines are safe and can elicit durable, complement-dependent transmission-blocking activity, making them a critical component of global malaria elimination and eradication strategies.

Other names

Pfs230Pfs230D1MPfs230D1+6-cysteine protein Pfs230Transmission-blocking target antigen Pfs230

Induction of transmission-blocking antibodies that, when ingested by a mosquito during a blood meal, bind to the Pfs230 protein on the surface of gametes to interfere with fertilization and oocyst development in a complement-dependent manner.