(+)-SJ733   Click here for help

GtoPdb Ligand ID: 9723

Synonyms: (+)-SJ000557733 | (+)-SJ557733
Antimalarial Ligand
Compound class: Synthetic organic
Comment: (+)-SJ733 is the optimized lead for the dihydroisoquinolones (DHIQ), a novel chemotype with antimalarial activity [2].
The (+)-enantiomer, shown here, has a significantly higher antimalarial potency [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 6
Topological polar surface area 86.09
Molecular weight 468.12
XLogP 3.8
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 N#Cc1cc(ccc1F)NC(=O)C1c2ccccc2C(=O)N(C1c1cccnc1)CC(F)(F)F
Isomeric SMILES N#Cc1cc(ccc1F)NC(=O)[C@H]1c2ccccc2C(=O)N([C@@H]1c1cccnc1)CC(F)(F)F
InChI InChI=1S/C24H16F4N4O2/c25-19-8-7-16(10-15(19)11-29)31-22(33)20-17-5-1-2-6-18(17)23(34)32(13-24(26,27)28)21(20)14-4-3-9-30-12-14/h1-10,12,20-21H,13H2,(H,31,33)/t20-,21+/m0/s1
InChI Key VKCPFWKTFZAOTO-LEWJYISDSA-N
No information available.
Summary of Clinical Use Click here for help
(+)-SJ733 has completed Phase 1 trials, demonstrating a favourable pharmacokinetic, tolerability, and safety profile combined with rapid parasite clearance [1].
Mechanism Of Action and Pharmacodynamic Effects Click here for help
The exact mechanism of action of (+)-SJ733 is not fully understood but Plasmodium non-SERCA-type Ca2+-transporting P-ATPase (PfATP4) may be the potential target because mutatations in PfATP4 confer resistance to this compound [2]. (+)-SJ733 produces a rapid perturbation of parasitic intracellular Na+ levels, in concurrence with the proposed role of PfATP4 in the regulation of Na+ homeostasis, followed by physical changes in the infected erythrocytes. It has been proposed that host-mediated clearance of infected cells may be responsible for the rapid action of PfATP4 inhibitors [2].
Clinical Trials
Clinical Trial ID Title Type Source Comment References
NCT02867059 SJ733 Induced Blood Stage Malaria Challenge Study Phase 1 Interventional Medicines for Malaria Venture 1
NCT02661373 First-in-Human Study of an Oral Plasmodium Falciparum Plasma Membrane Protein Inhibitor Phase 1 Interventional St. Jude Children's Research Hospital 1
NCT04709692 Efficacy of SJ733 in Adults With Uncomplicated Plasmodium Falciparum or Vivax Malaria Phase 2 Interventional University of Kentucky