Apical membrane antigen 1 (Plasmodium cynomolgi) (AMA1)

Apical membrane antigen 1 (AMA1) is a critical type I transmembrane protein found in the micronemes of Plasmodium cynomolgi, a simian malaria parasite that has recently emerged as a zoonotic threat to humans [3, 8]. AMA1 plays an essential role in the invasion of host cells, including both erythrocytes and hepatocytes, by facilitating the formation of a "moving junction" through its interaction with the rhoptry neck protein 2 (RON2) [5, 18, 20]. This interaction is vital for the parasite to reorient itself and successfully enter the host cell [5, 23]. Due to its indispensable role in the parasite life cycle, AMA1 is a primary target for the development of blood-stage malaria vaccines and inhibitory therapeutics [2, 7, 11]. However, the high degree of genetic polymorphism in the AMA1 gene presents a significant challenge, as it can lead to strain-specific immunity and allow the parasite to evade the host's immune response [4, 6, 15]. Current research focuses on identifying conserved epitopes or using multi-allelic vaccine formulations to overcome this diversity and provide broad protection against various Plasmodium strains [11, 19, 25].

Other names

AMA-1Merozoite surface antigenPK66 homolog

Inhibition of host cell invasion by blocking the interaction between AMA1 and the rhoptry neck protein 2 (RON2) complex, thereby preventing the formation of the moving junction required for entry into erythrocytes and hepatocytes.