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KX2-361   Click here for help

GtoPdb Ligand ID: 10004

Synonyms: KX-02 | KX2 361 | KX2361
Compound class: Synthetic organic
Comment: KX2-361 is a small molecule with a dual mode of action. It is a Src kinase inhibitor and an inhibitor of tubulin polymerization [1]. It is being investigated for antiproliferative potential. It is closely related to tirbanibulin, and like KX2-391 is a peptide substrate site binder rather than a competitive ATP binding site inhibitor. KX2-361 is orally bioavailable and shows a significant level of brain tissue exposure following oral administration.

KX2-361 is commercially available from our sponsors

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 5
Hydrogen bond donors 1
Rotatable bonds 7
Topological polar surface area 54.46
Molecular weight 405.19
XLogP 3.82
No. Lipinski's rules broken 0

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 O=C(Cc1ccc(cn1)c1ccc(cc1)N1CCOCC1)NCc1cccc(c1)F
Isomeric SMILES O=C(Cc1ccc(cn1)c1ccc(cc1)N1CCOCC1)NCc1cccc(c1)F
InChI InChI=1S/C24H24FN3O2/c25-21-3-1-2-18(14-21)16-27-24(29)15-22-7-4-20(17-26-22)19-5-8-23(9-6-19)28-10-12-30-13-11-28/h1-9,14,17H,10-13,15-16H2,(H,27,29)
InChI Key CMKKPJNMYLOUCE-UHFFFAOYSA-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/)
Bioactivity Comments
KX2-361 has nM level potency against a range of CNS tumour cell lines, and induces 30% long-term complete tumour remission in animal models of glioblastoma [1]. α and β tubulin binding was shown using a photoaffinity analogue of KX2-391 [1]. KX2-361 disrupts tubulin filament formation in GL261 mouse glioma cells at 250 nM.
Selectivity at enzymes
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
SRC proto-oncogene, non-receptor tyrosine kinase Hs Inhibitor Inhibition - - - 1
⤷ [1]