WEHI-842   Click here for help

GtoPdb Ligand ID: 10616

PDB Ligand Antimalarial Ligand
Compound class: Synthetic organic
Comment: WEHI-842 was developed as a potent peptidomimetic inhibitor of Plasmodium plasmepsin V (PMV), a promising target for antimalarial drug development [2].

The Malaria tab on this ligand page provides additional curator comments of relevance to the Guide to MALARIA PHARMACOLOGY.
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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View interactive charts of activity data across species
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 12
Hydrogen bond donors 7
Rotatable bonds 25
Topological polar surface area 219.49
Molecular weight 669.38
XLogP 3.57
No. Lipinski's rules broken 3

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES NC(=NOCC[C@@H](C(=O)N[C@H](C(=O)N[C@H]([C@H](CC(=O)NCCc1ccccc1)O)CC(C)C)C(C)C)NC(=O)OCc1ccccc1)N
Isomeric SMILES NC(=NOCC[C@@H](C(=O)N[C@H](C(=O)N[C@H]([C@H](CC(=O)NCCc1ccccc1)O)CC(C)C)C(C)C)NC(=O)OCc1ccccc1)N
InChI InChI=1S/C34H51N7O7/c1-22(2)19-27(28(42)20-29(43)37-17-15-24-11-7-5-8-12-24)38-32(45)30(23(3)4)40-31(44)26(16-18-48-41-33(35)36)39-34(46)47-21-25-13-9-6-10-14-25/h5-14,22-23,26-28,30,42H,15-21H2,1-4H3,(H,37,43)(H,38,45)(H,39,46)(H,40,44)(H4,35,36,41)/t26-,27-,28-,30-/m0/s1
InChI Key VAHRPHLZONNTFF-NUISNXNRSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
Bioactivity Comments
WEHI-842 inhibits P. falciparum and P. vivax recombinant PMV with a IC50 of 0.2 nM and 0.4 nM respectively [2].
The interaction table below provides data from whole cell assays, giving the antiparasite activity of WEHI-842 against the asexual blood stage of the Plasmodium lifecycle and examining its transmission-blocking potential. The malaria parasite is sensitive to PMV inhibition at two points during the asexual blood stage; immediately after invasion and the early trophozoite [4]. WEHI-842 inhibits development of stage II-V gametocytes, while gametocytogenesis in the presence of sublethal inhibitor concentrations results in gametocytes that fail to infect mosquitoes [3].
Selectivity at other protein targets
Key to terms and symbols Click on species/strain names for details Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
Plasmodium falciparum plasmepsin V Pf

Plasmodium falciparum

P. falciparum (Pf) is one of five protozoan parasite species of the genus Plasmodium that cause malaria in humans. Pf is responsible for the majority of malaria related deaths and is the most prevalent species in sub-Saharan Africa.
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 Inhibitor Inhibition 9.7 pIC50 - 2
⤷ pIC50 9.7 (IC50 2x10-10 M) [2]
Whole organism assay data
Key to terms and symbols Click on species/strain names for details Click column headers to sort
MOA/likely target Sp. Assay description Type Action Value Parameter Concentration range (M) Reference
Plasmodium falciparum plasmepsin V PfNF54

Plasmodium falciparum NF54

P. falciparum strain NF54 (PfNF54) was derived from a patient who had never left the Netherlands.
PfNF54 can be obtained from the European Malaria Reagent Repository or the Malaria Research and Reference Reagent Resource Center (MR4) and is sensitive to a panel of antimalarial compounds including chloroquine and pyrimethamine.
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 Parasite gametocyte assay - - 7.4 pEC50 - 3
⤷ pEC50 7.4 (EC50 4x10-8 M) Giemsa-stained blood film counts: no stage II-V gametocytes were observed [3]
Lifecycle stages: Plasmodium sexual blood stage (gametocyte)
Plasmodium falciparum plasmepsin V Pf3D7

Plasmodium falciparum 3D7

P. falciparum strain 3D7 (Pf3D7) was derived from isolate NF54 by limiting dilution. The complete genome of Pf3D7 has been sequenced (GenBank: LN999946.1).
Pf3D7 can be obtained from the European Malaria Reagent Repository or the Malaria Research and Reference Reagent Resource Center (MR4) and is sensitive to a panel of antimalarial compounds including chloroquine and pyrimethamine.
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 Parasite growth inhibition assay - - 6.4 pEC50 - 2
⤷ pEC50 6.4 (EC50 4x10-7 M) [2]
Lifecycle stages: Plasmodium asexual blood stage (erythrocytic merozoite, trophozoite, erythrocytic schizont)
Plasmodium falciparum plasmepsin V PfNF54

Plasmodium falciparum NF54

P. falciparum strain NF54 (PfNF54) was derived from a patient who had never left the Netherlands.
PfNF54 can be obtained from the European Malaria Reagent Repository or the Malaria Research and Reference Reagent Resource Center (MR4) and is sensitive to a panel of antimalarial compounds including chloroquine and pyrimethamine.
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 Standard membrane feeding assay (SMFA) - - - - - 3
⤷ Oocyst count: WEHI-842 demonstrates a dose-dependent inhibitory effect on transmission fitness [3]
Lifecycle stages: Plasmodium mosquito host stage (gametocyte, gamete, zygote, ookinete, oocyst, sporozoite)