romaciclib   Click here for help

GtoPdb Ligand ID: 13753

Synonyms: RVU120 | SEL120 | SEL120-34A
Compound class: Synthetic organic
Comment: Romaciclib (RVU120; SEL120-34A) is an ATP-competitive and selective cyclin-dependent kinase 8 (CDK8) inhibitor [1]. The functions of CDK8 and its paralog CDK19 are implicated in sustained proliferation and viability of cancer cells through modulation of oncogenic transcriptional processes. Inhibition of CDK8 function is a focus of current anti-cancer therapeutic development, particularly in relation to acute myeloid leukemia.
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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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Click here for structure editor
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 4
Hydrogen bond donors 1
Rotatable bonds 1
Topological polar surface area 30.87
Molecular weight 414.14
XLogP 3.14
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 CC1=C(C(=C2CCCN3C2=C1N=C3N4CCNCC4)Br)Br
Isomeric SMILES CC1=C2C3=C(CCCN3C(=N2)N4CCNCC4)C(=C1Br)Br
InChI InChI=1S/C15H18Br2N4/c1-9-11(16)12(17)10-3-2-6-21-14(10)13(9)19-15(21)20-7-4-18-5-8-20/h18H,2-8H2,1H3
InChI Key FSBMCTDYWXIBLM-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
SEL120-34A inhibits CDK8-mediated phosphorylation of STAT1 S727 and STAT5 S726 in cancer cells in vitro [1]. Low potency inhibition of CDK9 (IC50 1070 nM) was detected. SEL120-34A does not significantly inhibit any other CDKs (CDK1, 2, 4, 6, 5, 7) in vitro.
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 8 Hs Inhibitor Inhibition 8.5 pKd - 1
⤷ pKd 8.5 (Kd 3x10-9 M) [1]
Description: Binding dissociation constant for hCDK8 protein
cyclin dependent kinase 8 Hs Inhibitor Inhibition 8.4 pIC50 - 1
⤷ pIC50 8.4 (IC50 4.4x10-9 M) [1]
Description: Inhibition of CDK8/CycC kinase activity
cyclin dependent kinase 19 Hs Inhibitor Inhibition 8.0 pIC50 - 1
⤷ pIC50 8.0 (IC50 1.04x10-8 M) [1]
Description: Inhibition of CDK19/CycC kinase activity