defactinib   Click here for help

GtoPdb Ligand ID: 7910

Synonyms: PF-04554878 | VS-6063
PDB Ligand
Compound class: Synthetic organic
Comment: Defactinib (VS-6063) is an orally bioavailable, second generation, small-molecule focal adhesion kinase (FAK) inhibitor with potential antiangiogenic and antineoplastic activities [1,9]. Phase 1 clinical trial results show that Defactinib is well tolerated and exhibits some clinical efficacy in patients (albeit in only two reported subjects) with advanced solid tumours [3,11].
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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 11
Hydrogen bond donors 3
Rotatable bonds 10
Topological polar surface area 150.48
Molecular weight 510.14
XLogP 2.2
No. Lipinski's rules broken 1
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 CNC(=O)c1ccc(cc1)Nc1ncc(c(n1)NCc1nccnc1N(S(=O)(=O)C)C)C(F)(F)F
Isomeric SMILES CNC(=O)c1ccc(cc1)Nc1ncc(c(n1)NCc1nccnc1N(S(=O)(=O)C)C)C(F)(F)F
InChI InChI=1S/C20H21F3N8O3S/c1-24-18(32)12-4-6-13(7-5-12)29-19-28-10-14(20(21,22)23)16(30-19)27-11-15-17(26-9-8-25-15)31(2)35(3,33)34/h4-10H,11H2,1-3H3,(H,24,32)(H2,27,28,29,30)
InChI Key FWLMVFUGMHIOAA-UHFFFAOYSA-N
No information available.
Summary of Clinical Use Click here for help
As of December 2018 defactinib (PF-04554878/VS-6063) had progressed to Phase 2 clinical evaluations in a variety of advanced solid malignancies. Click here to link to ClinicalTrials.gov's full list of defactinib trials.
Mechanism Of Action and Pharmacodynamic Effects Click here for help
The tyrosine kinase FAK is a key signal transducer for integrins and growth factors, that is upregulated in many tumor cell types and is involved in tumor cell invasion, migration and proliferation [7]. Autophosphorylation of FAK at Tyr397 mediates interation with downstream signalling molecules including ERK, JNK/MAPK and PI3K/Akt [8,10]. FAK inhibition is therefore likely to prevent the activation of these signal transduction pathways, thus inhibiting tumor cell migration, proliferation and survival [2]. In addition, FAK inhibition with defactinib has been reported to overcome YB-1 (YBX1; P67809)-mediated paclitaxel resistance in in vitro tumour cell models, via an Akt-dependent pathway [4].