Identification of an Atg8-Atg3 protein-protein interaction inhibitor from the medicines for malaria venture malaria box active in blood and liver stage plasmodium falciparum parasites

Adelaide U.P. Hain, David Bartee, Natalie G. Sanders, Alexia S. Miller, David J. Sullivan, Jelena Levitskaya, Caren Freel Meyers, Jürgen Bosch

Research output: Contribution to journalArticlepeer-review

Abstract

Atg8 is a ubiquitin-like autophagy protein in eukaryotes that is covalently attached (lipidated) to the elongating autophagosomal membrane. Autophagy is increasingly appreciated as a target in diverse diseases from cancer to eukaryotic parasitic infections. Some of the autophagy machinery is conserved in the malaria parasite, Plasmodium. Although Atg8's function in the parasite is not well understood, it is essential for Plasmodium growth and survival and partially localizes to the apicoplast, an indispensable organelle in apicomplexans. Here, we describe the identification of inhibitors from the Malaria Medicine Venture Malaria Box against the interaction of PfAtg8 with its E2-conjugating enzyme, PfAtg3, by surface plasmon resonance. Inhibition of this protein-protein interaction prevents PfAtg8 lipidation with phosphatidylethanolamine. These small molecule inhibitors share a common scaffold and have activity against both blood and liver stages of infection by Plasmodium falciparum. We have derivatized this scaffold into a functional platform for further optimization.

Original languageEnglish (US)
Pages (from-to)4521-4531
Number of pages11
JournalJournal of medicinal chemistry
Volume57
Issue number11
DOIs
StatePublished - Jun 12 2014

ASJC Scopus subject areas

  • Molecular Medicine
  • Drug Discovery

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