4I4E

Structure of Focal Adhesion Kinase catalytic domain in complex with hinge binding pyrazolobenzothiazine compound.

• PDB DOI:  https://doi.org/10.2210/pdb4I4E/pdb

• Classification: transferase/transferase inhibitor
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2012-11-27 Released: 2013-03-06 
• Deposition Author(s): Skene, R.J., Hosfield, D.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.189 
• R-Value Work: 0.165 
• R-Value Observed: 0.166 

Literature

Structure-based discovery of cellular-active allosteric inhibitors of FAK.

Tomita, N., Hayashi, Y., Suzuki, S., Oomori, Y., Aramaki, Y., Matsushita, Y., Iwatani, M., Iwata, H., Okabe, A., Awazu, Y., Isono, O., Skene, R.J., Hosfield, D.J., Miki, H., Kawamoto, T., Hori, A., Baba, A.

(2013) Bioorg Med Chem Lett 23: 1779-1785

• PubMed: 23414845 
• DOI: https://doi.org/10.1016/j.bmcl.2013.01.047
• Primary Citation of Related Structures:  
  4I4E, 4I4F


• PubMed Abstract: 
  

In order to develop potent and selective focal adhesion kinase (FAK) inhibitors, synthetic studies on pyrazolo[4,3-c][2,1]benzothiazines targeted for the FAK allosteric site were carried out. Based on the X-ray structural analysis of the co-crystal of the lead compound, 8-(4-ethylphenyl)-5-methyl-1,5-dihydropyrazolo[4,3-c][2,1]benzothiazine 4,4-dioxide 1 with FAK, we designed and prepared 1,5-dimethyl-1,5-dihydropyrazolo[4,3-c][2,1]benzothiazin derivatives which selectively inhibited kinase activity of FAK without affecting seven other kinases. The optimized compound, N-(4-tert-butylbenzyl)-1,5-dimethyl-1,5-dihydropyrazolo[4,3-c][2,1]benzothiazin-8-amine 4,4-dioxide 30 possessed significant FAK kinase inhibitory activities both in cell-free (IC50=0.64μM) and in cellular assays (IC50=7.1μM). These results clearly demonstrated a potential of FAK allosteric inhibitors as antitumor agents.

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Organizational Affiliation: 

Pharmaceutical Research Division, Takeda Pharmaceutical Company Ltd, 26-1 Muraoka-Higashi 2-Chome, Fujisawa, Kanagawa 251-8555, Japan. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 32.59 kDa 
• Atom Count: 2,418 
• Modelled Residue Count: 254 
• Deposited Residue Count: 281 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Focal adhesion kinase 1	A	281	Homo sapiens	Mutation(s): 0  Gene Names: PTK2, FAK, FAK1 EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q05397 (Homo sapiens) Explore Q05397  Go to UniProtKB:  Q05397
PHAROS:  Q05397

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
1BQ	B [auth A]	[4-(2-hydroxyethyl)piperidin-1-yl][4-(5-methyl-4,4-dioxido-1,5-dihydropyrazolo[4,3-c][2,1]benzothiazin-8-yl)phenyl]methanone C24 H26 N4 O4 S FADYFQASOSLUAS-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
1BQ	PDBBind:  4I4E	IC50: 500 (nM) from 1 assay(s)
	Binding MOAD:  4I4E	IC50: 500 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.189 
• R-Value Work: 0.165 
• R-Value Observed: 0.166 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 45.584	α = 90
b = 47.339	β = 98.99
c = 62.686	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-03-06 
Deposition Author(s): Skene, R.J., Hosfield, D.J.

Revision History  

• Version 1.0: 2013-03-06
  Type: Initial release
  
• Version 1.1: 2013-04-24
  Changes: Database references
• Version 1.2: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description