lunresertib   Click here for help

GtoPdb Ligand ID: 13211

Synonyms: (Rac)-RP-6306
PDB Ligand
Compound class: Synthetic organic
Comment: Lunresertib (RP-6306) is the first lead candidate in the class of protein kinase, membrane associated tyrosine/threonine 1 (PKMYT1) inhibitors to be advanced for clinical evaluation [3]. It is orally bioavailable and selective for PKMYT1, and it is active in appropriate preclinical xenograft models of solid tumours [1]. PKMYT1 is a negative regulator of CDK1 [2], and its inhibition induces activation of CDK1 selectively in CCNE1-overexpressing cells; CCNE1 being a chromosome 19q12 locus that is amplified in multiple tumour types and which is a marker of poor prognosis and/or insensitivity to cytotoxic oncotherapies. As a monotherapy lunresertib induces synthetic lethality in combination with CCNE1 amplification (or alongside inactivating mutations in FBXW7 and PPP2R1A).

Structure note: the INN record for lunresertib does not specify the (S) stereo specification that is declared in the original disclosure of RP-6306's chemical structure [3]. We depict the racaemic mixture with no defined stereo centers.
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 3
Rotatable bonds 2
Topological polar surface area 104.94
Molecular weight 324.38
XLogP 1.05
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 CC1=CC=C(C(=C1N2C(=C(C3=C2N=C(C)C(=C3)C)C(=O)N)N)C)O
Isomeric SMILES CC1=C(C(=C(C=C1)O)C)N2C(=C(C3=C2N=C(C(=C3)C)C)C(=O)N)N
InChI InChI=1S/C18H20N4O2/c1-8-5-6-13(23)10(3)15(8)22-16(19)14(17(20)24)12-7-9(2)11(4)21-18(12)22/h5-7,23H,19H2,1-4H3,(H2,20,24)
InChI Key ARBRHWRTXPWZGN-UHFFFAOYSA-N
Bioactivity Comments
RP-6306 displays PKMYT1 selectivity (29-4000-fold) over five ephrins (A1, A2, B2, B3, and B4), FRK, cSRC, and the related WEE1 kinase in the NanoBRET cell-based target engagement assay [3].