Abstract:
:To explore the possibility of constrained peptides to target Plasmodium-infected cells, we designed a J domain mimetic derived from Plasmodium falciparum calcium-dependent protein kinase 1 ( PfCDPK1) as a strategy to disrupt J domain binding and inhibit PfCDPK1 activity. The J domain disruptor (JDD) peptide was conformationally constrained using a hydrocarbon staple and was found to selectively permeate segmented schizonts and colocalize with intracellular merozoites in late-stage parasites. In vitro analyses demonstrated that JDD could effectively inhibit the catalytic activity of recombinant PfCDPK1 in the low micromolar range. Treatment of late-stage parasites with JDD resulted in a significant decrease in parasite viability mediated by a blockage of merozoite invasion, consistent with a primary effect of PfCDPK1 inhibition. To the best of our knowledge, this marks the first use of stapled peptides designed to specifically target a Plasmodium falciparum protein and demonstrates that stapled peptides may serve as useful tools for exploring potential antimalarial agents.
journal_name
ACS Infect Disjournal_title
ACS infectious diseasesauthors
Flaherty BR,Ho TG,Schmidt SH,Herberg FW,Peterson DS,Kennedy EJdoi
10.1021/acsinfecdis.8b00347subject
Has Abstractpub_date
2019-04-12 00:00:00pages
506-514issue
4issn
2373-8227journal_volume
5pub_type
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