A multistage antimalarial targets the plasmepsins IX and X essential for invasion and egress

• Autores: Paco Pino, Reto Caldelari, Budhaditya Mukherjee
• Localización: Science, ISSN 0036-8075, Vol. 358, Nº 6362, 2017, págs. 522-528
• Idioma: inglés
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• Resumen

  • 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.