palbociclib   Click here for help

GtoPdb Ligand ID: 7380

Synonyms: Ibrance® | PD-0332991 | PD0332991
Approved drug PDB Ligand
palbociclib is an approved drug (FDA (2015), EMA (2016))
Compound class: Synthetic organic
Comment: Palbociclib is a selective inhibitor of the cyclin-dependent kinases CDK4 and CDK6 [6-7,14]. This kinase inhibitor has anti-tumour activity in several tumour models [6-7,9,15-16].
The pharmaceutical formulation contains palbociclib isethionate (PubChem CID 11478676).
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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

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View more information in the IUPHAR Pharmacology Education Project: palbociclib

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 5
Topological polar surface area 105.04
Molecular weight 447.24
XLogP 3.29
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 CC(=O)c1c(C)c2cnc(nc2n(c1=O)C1CCCC1)Nc1ccc(cn1)N1CCNCC1
Isomeric SMILES CC(=O)c1c(C)c2cnc(nc2n(c1=O)C1CCCC1)Nc1ccc(cn1)N1CCNCC1
InChI InChI=1S/C24H29N7O2/c1-15-19-14-27-24(28-20-8-7-18(13-26-20)30-11-9-25-10-12-30)29-22(19)31(17-5-3-4-6-17)23(33)21(15)16(2)32/h7-8,13-14,17,25H,3-6,9-12H2,1-2H3,(H,26,27,28,29)
InChI Key AHJRHEGDXFFMBM-UHFFFAOYSA-N
Bioactivity Comments
Palbociclib acts via inhibition of CDK4/6 to dose-dependently reduce phosphorylation of the retinoblastoma protein (Rb) with an IC50 of 30nM [15] in both MV4-11 and MOLM13 acute myelocytic leukemia (AML) cell lines.
Selectivity at enzymes
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
cyclin dependent kinase 4 Primary target of this compound Hs Inhibitor Inhibition 7.4 – 8.5 pIC50 - 7,12-13
⤷ pIC50 8.5 (IC50 3.2x10-9 M) [12]
pIC50 8.0 (IC50 1.1x10-8 M) [7]
pIC50 7.4 (IC50 4.4x10-8 M) [13]
cyclin dependent kinase 6 Primary target of this compound Hs Inhibitor Inhibition 7.4 – 8.0 pIC50 - 7,12-13
⤷ pIC50 8.0 (IC50 1.1x10-8 M) [12]
pIC50 7.8 (IC50 1.6x10-8 M) [7]
pIC50 7.4 (IC50 3.6x10-8 M) [13]
Ligand mentioned in the following text fields
CDK4 subfamily overview