A multistage antimalarial targets the plasmepsins IX and X essential for invasion and egressMore about Open Access at the Crick
Authors listPaco Pino Reto Caldelari Budhaditya Mukherjee Juha Vahokoski Natacha Klages Bohumil Maco Christine R Collins Michael Blackman Inari Kursula Volker Heussler Mathieu Brochet Dominique Soldati-Favre
Regulated exocytosis by secretory organelles is important for malaria parasite invasion and egress. Many parasite effector proteins, including perforins, adhesins, and proteases, are extensively proteolytically processed both pre- and postexocytosis. Here we report the multistage antiplasmodial activity of the aspartic protease inhibitor hydroxyl-ethyl-amine-based scaffold compound 49c. This scaffold inhibits the preexocytosis processing of several secreted rhoptry and microneme proteins by targeting the corresponding maturases plasmepsins IX (PMIX) and X (PMX), respectively. Conditional excision of PMIX revealed its crucial role in invasion, and recombinantly active PMIX and PMX cleave egress and invasion factors in a 49c-sensitive manner.
Issue number 6362