analog 18 [PMID: 28696697]   Click here for help

GtoPdb Ligand ID: 11567

Antimalarial Ligand
Compound class: Synthetic organic
Comment: Analog 18 is the lead from a class of antimalarial compounds based on the naturally derived tripeptide molecule carmaphycin B [1]. Functionally these compounds inhibit the Plasmodium proteasome.

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 8
Hydrogen bond donors 3
Rotatable bonds 20
Topological polar surface area 116.9
Molecular weight 481.35
XLogP 4.31
No. Lipinski's rules broken 1

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 CCCC[C@@H](C(=O)N[C@H](C(=O)[C@]1(C)OC1)CC(C)C)NC(=O)[C@@H](C(C)C)NC(=O)CCCCC
Isomeric SMILES CCCC[C@@H](C(=O)N[C@H](C(=O)[C@]1(C)OC1)CC(C)C)NC(=O)[C@@H](C(C)C)NC(=O)CCCCC
InChI InChI=1S/C26H47N3O5/c1-8-10-12-14-21(30)29-22(18(5)6)25(33)27-19(13-11-9-2)24(32)28-20(15-17(3)4)23(31)26(7)16-34-26/h17-20,22H,8-16H2,1-7H3,(H,27,33)(H,28,32)(H,29,30)/t19-,20-,22+,26+/m0/s1
InChI Key XAZZJHQEPVCAEX-RRTYAWIHSA-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/)
Guide to Malaria Pharmacology Comments
Carmaphycin B has potent activity against multiple stages of the malaria parasite lifecycle (liver, asexual and sexual blood stages) but is toxic to mammalian cells in vitro [1]. Using the carmaphycin B scaffold, the same study describes the design of analog 18 that retains blood stage antimalarial activity and with a 123-fold increase in selectivity.

Potential Target/Mechanism Of Action: analog 18 is an inhibitor of the β5 subunit of the of P. falciparum proteasome [1].