Plasmodium falciparum P52 protein (PfP52) (PfP52)

The Plasmodium falciparum P52 protein is a member of the 6-cys family of surface proteins, primarily expressed during the sporozoite stage of the malaria parasite's life cycle (UniProt: Q8I4W6). It plays a critical role alongside its partner protein, P36, in the successful invasion of human hepatocytes (Ishino et al., 2005, PLOS Biology). Specifically, P52 is essential for the formation of the parasitophorous vacuole (PV), a protective membrane that allows the parasite to survive and replicate within the host liver cell (van Schaijk et al., 2008, Molecular Microbiology). Research has demonstrated that parasites lacking the P52 gene are unable to establish a productive infection in the liver, leading to early developmental arrest. This characteristic makes P52 a primary candidate for the development of genetically attenuated parasite (GAP) vaccines, such as the PfSPZ-GA1 candidate (NCBI: PMC5463011). By deleting P52, scientists can create a live vaccine that stimulates a robust immune response without causing clinical disease. Beyond vaccines, P52 is also explored as a target for neutralizing antibodies that could block the initial stages of infection.

Other names

P526-cys protein P52PF3D7_0404500Sporozoite protein P52

Targeting of P52 through genetic deletion creates live-attenuated vaccines that arrest during liver-stage development, inducing protective T-cell and antibody responses; Antibody-mediated neutralization of sporozoite invasion.