Abstract:
:Following erythrocyte invasion, malaria parasites export a catalogue of remodeling proteins into the infected cell that enable parasite development in the human host. Export is dependent on the activity of the aspartyl protease, plasmepsin V (PMV), which cleaves proteins within the Plasmodium export element (PEXEL; RxL↓xE/Q/D) in the parasite's endoplasmic reticulum. Here, we generated transition state mimetics of the native PEXEL substrate that potently inhibit PMV isolated from Plasmodium falciparum and Plasmodium vivax. Through optimization, we identified that the activity of the mimetics was completely dependent on the presence of P1 Leu and P3 Arg. Treatment of P. falciparum-infected erythrocytes with a set of optimized mimetics impaired PEXEL processing and killed the parasites. The striking effect of the compounds provides a clearer understanding of the accessibility of the PMV active site and reaffirms the enzyme as an attractive target for the design of future antimalarials.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Sleebs BE,Gazdik M,O'Neill MT,Rajasekaran P,Lopaticki S,Lackovic K,Lowes K,Smith BJ,Cowman AF,Boddey JAdoi
10.1021/jm500797gsubject
Has Abstractpub_date
2014-09-25 00:00:00pages
7644-62issue
18eissn
0022-2623issn
1520-4804journal_volume
57pub_type
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