tucatinib   Click here for help

GtoPdb Ligand ID: 9922

Synonyms: ARRY-380 | Example 11 [WO2007059257A2] | ONT-380 | Tukysa®
Approved drug
tucatinib is an approved drug (FDA (2020), EMA (2021))
Compound class: Synthetic organic
Comment: Tucatinib is an orally bioavailable ERBB2 (HER2) receptor tyrosine kinase inhibitor that was developed as a novel antineoplastic agent by Seattle Genetics [2]. The chemical structure is claimed as Example 11 in Array Biopharma patent WO2007059257A2 [3], and was exemplified as ARRY-380 in the later patent WO2013056183A1 [1]. Tucatinib contains a quinazoline core that is conserved in other tyrosine kinase inhibitors including lapatinib, erlotinib, and gefitinib [2].
The INN tucatinib replaced the earlier INN irbinitinib that was associated with this chemical entity.
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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 8
Hydrogen bond donors 2
Rotatable bonds 6
Topological polar surface area 110.85
Molecular weight 480.2
XLogP 3.75
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 Cc1cc(ccc1Oc1ccn2c(c1)ncn2)Nc1ncnc2c1cc(cc2)NC1=NC(CO1)(C)C
Isomeric SMILES Cc1cc(ccc1Oc1ccn2c(c1)ncn2)Nc1ncnc2c1cc(cc2)NC1=NC(CO1)(C)C
InChI InChI=1S/C26H24N8O2/c1-16-10-17(5-7-22(16)36-19-8-9-34-23(12-19)28-15-30-34)31-24-20-11-18(4-6-21(20)27-14-29-24)32-25-33-26(2,3)13-35-25/h4-12,14-15H,13H2,1-3H3,(H,32,33)(H,27,29,31)
InChI Key SDEAXTCZPQIFQM-UHFFFAOYSA-N
Bioactivity Comments
Lapatinib and neratinib do not exhibit the selectivity for ERBB2 compared to EGFR that tucatinib does [2]. In a biochemical screen of 223 kinases, tucatinib showed selectivity within the EGFR kinase family, and inhibition of other kinases was minimal. Tucatinib inhibits HER2 signalling activity in BT-474 HER2-driven breast cancer cells (receptor phosphorylation; IC50 7 nM) and proliferation of these cells (IC50 33 nM), These effects were less potent in EGFR-driven A431 cells.
Selectivity at catalytic receptors
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
erb-b2 receptor tyrosine kinase 2 Primary target of this compound Hs Inhibitor Inhibition 8.2 pIC50 - 2
⤷ pIC50 8.2 (IC50 6.9x10-9 M) [2]
Description: Inhibition of enzyme activity in a biochemical assay.
erb-b2 receptor tyrosine kinase 4 Hs Inhibitor Inhibition 6.5 pIC50 - 2
⤷ pIC50 6.5 (IC50 3.1x10-7 M) [2]
Description: Inhibition of enzyme activity in a biochemical assay.
epidermal growth factor receptor Hs Inhibitor Inhibition 6.3 pIC50 - 2
⤷ pIC50 6.3 (IC50 4.49x10-7 M) [2]
Description: Inhibition of enzyme activity in a biochemical assay.