iclaprim   Click here for help

GtoPdb Ligand ID: 10820

Synonyms: AR-100 | AR100 | Mersarex® | RO-48-2622 | RO-482622
Compound class: Synthetic organic
Comment: Iclaprim is a dihydrofolate reductase (DHFR) inhibitor that reduces folic acid synthesis. It is a diaminopyrimidine antibacterial that has broad-spectrum activity against Gram +ve pathogens [1]. Iclaprim is a racemic mixture of stereoisomers. We show the 'flat' structure to represent the mixture.
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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 4
Hydrogen bond donors 2
Rotatable bonds 5
Topological polar surface area 105.51
Molecular weight 354.17
XLogP 1.91
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 COc1cc(Cc2cnc(nc2N)N)c2c(c1OC)OC(C=C2)C1CC1
Isomeric SMILES COc1cc(Cc2cnc(nc2N)N)c2c(c1OC)OC(C=C2)C1CC1
InChI InChI=1S/C19H22N4O3/c1-24-15-8-11(7-12-9-22-19(21)23-18(12)20)13-5-6-14(10-3-4-10)26-16(13)17(15)25-2/h5-6,8-10,14H,3-4,7H2,1-2H3,(H4,20,21,22,23)
InChI Key HWJPWWYTGBZDEG-UHFFFAOYSA-N
No information available.
Summary of Clinical Use Click here for help
Iclaprim was developed to treat acute bacterial skin and skin structure infections (ABSSSI) and hospital-acquired bacterial pneumonia[4]. Phase 3 trials comparing iclaprim against both vancomycin and linezolid for ABSSSI have been completed. An application for marketing authorisation to the EMA for Mersarex, to be used to treat complicated skin and soft tissue infections, was withdrawn in 2009 [3]. A New Drug Application (from Motif Bio) for treatment of ABSSSI was accepted for review by the FDA in 2018. The FDA's response to this NDA stipulated that more data, and additional clinical study, addressing liver toxicity risk would be required before it could be approved [2].