compound 55 [PMID: 29889526]   Click here for help

GtoPdb Ligand ID: 10016

Antimalarial Ligand
Compound class: Synthetic organic
Comment: Compound 55 is the drug-like lead discovered as a result of a SAR investigation and is a 2,8-Disubstituted-1,5-naphthyridine derivative of MMV024101 [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 CDK toolkit. 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 6
Hydrogen bond donors 1
Rotatable bonds 4
Topological polar surface area 107.21
Molecular weight 430.07
XLogP 3.15
No. Lipinski's rules broken 0
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.

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Canonical SMILES FC(c1nccc(c1)c1ccnc2c1nc(cc2)c1cccc(c1)S(=O)(=O)N)(F)F
Isomeric SMILES FC(c1nccc(c1)c1ccnc2c1nc(cc2)c1cccc(c1)S(=O)(=O)N)(F)F
InChI InChI=1S/C20H13F3N4O2S/c21-20(22,23)18-11-12(6-8-26-18)15-7-9-25-17-5-4-16(27-19(15)17)13-2-1-3-14(10-13)30(24,28)29/h1-11H,(H2,24,28,29)
InChI Key UNHBOZVTSNPRRO-UHFFFAOYSA-N
Bioactivity Comments
Compound 55 shows good in vitro antiplasmodial activity against chloroquine sensitive P. falciparum NF54 and multidrug resistant P. falciparum K1 [2]. It shows no cardiotoxicity risk (hERG IC50 > 10 μM). It was shown to be effective in the in vivo NSG mouse model of P. falciparum infection [1], where it exhibited an IC50 value of 142 nM in mice infected with human specific Pf3D7 [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 phosphatidylinositol 4-kinase beta 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 growth inhibition assay - - 7.2 pIC50 - 2
⤷ pIC50 7.2 (IC50 6.3x10-8 M) Parasite lactate dehydrogenase (pLDH ) assay [2]
Lifecycle stages: Plasmodium asexual blood stage (erythrocytic merozoite, trophozoite, erythrocytic schizont)
Plasmodium falciparum phosphatidylinositol 4-kinase beta PfK1

Plasmodium falciparum K1

P. falciparum strain K1 (PfK1) was isolated in Kanchanaburi, Thailand in 1979.
PfK1 can be obtained from the European Malaria Reagent Repository or the Malaria Research and Reference Reagent Resource Center (MR4) and is reported to be a multidrug-resistant strain.
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 Parasite growth inhibition assay - - 7.0 pIC50 - 2
⤷ pIC50 7.0 (IC50 1.02x10-7 M) Parasite lactate dehydrogenase (pLDH ) assay [2]
Lifecycle stages: Plasmodium asexual blood stage (erythrocytic merozoite, trophozoite, erythrocytic schizont)