Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 35.48 kDa 
• Atom Count: 2445 
• Modelled Residue Count: 284 
• Deposited Residue Count: 308 
• Unique protein chains: 1

5E1S

The Crystal structure of INSR Tyrosine Kinase in complex with the Inhibitor BI 885578

• PDB DOI: 10.2210/pdb5E1S/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2015-09-30 Released: 2015-10-14 
• Deposition Author(s): Kessler, D., Zahn, S., Sanderson, M., Wolkerstorfer, B.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.26 Å
• R-Value Free: 0.262 
• R-Value Work: 0.213 
• R-Value Observed: 0.215 

Literature

BI 885578, a Novel IGF1R/INSR Tyrosine Kinase Inhibitor with Pharmacokinetic Properties That Dissociate Antitumor Efficacy and Perturbation of Glucose Homeostasis.

Sanderson, M.P., Apgar, J., Garin-Chesa, P., Hofmann, M.H., Kessler, D., Quant, J., Savchenko, A., Schaaf, O., Treu, M., Tye, H., Zahn, S.K., Zoephel, A., Haaksma, E., Adolf, G.R., Kraut, N.

(2015) Mol Cancer Ther 14: 2762-2772

• PubMed: 26438154 
• DOI: 10.1158/1535-7163.MCT-15-0539
• Primary Citation of Related Structures:  
  5E1S


• PubMed Abstract: 
  

Inhibition of the IGF1R, INSRA, and INSRB receptor tyrosine kinases represents an attractive approach of pharmacologic intervention in cancer, owing to the roles of the IGF1R and INSRA in promoting cell proliferation and survival. However, the central role of the INSRB isoform in glucose homeostasis suggests that prolonged inhibition of this kinase could result in metabolic toxicity. We describe here the profile of the novel compound BI 885578, a potent and selective ATP-competitive IGF1R/INSR tyrosine kinase inhibitor distinguished by rapid intestinal absorption and a short in vivo half-life as a result of rapid metabolic clearance. BI 885578, administered daily per os, displayed an acceptable tolerability profile in mice at doses that significantly reduced the growth of xenografted human GEO and CL-14 colon carcinoma tumors. We found that treatment with BI 885578 is accompanied by increases in circulating glucose and insulin levels, which in turn leads to compensatory hyperphosphorylation of muscle INSRs and subsequent normalization of blood glucose within a few hours. In contrast, the normalization of IGF1R and INSR phosphorylation in GEO tumors occurs at a much slower rate. In accordance with this, BI 885578 led to a prolonged inhibition of cell proliferation and induction of apoptosis in GEO tumors. We propose that the remarkable therapeutic window observed for BI 885578 is achieved by virtue of the distinctive pharmacokinetic properties of the compound, capitalizing on the physiologic mechanisms of glucose homeostasis and differential levels of IGF1R and INSR expression in tumors and normal tissues.

---

Organizational Affiliation: 

Boehringer Ingelheim RCV GmbH & Co KG, Department of Pharmacology, Dr. Boehringer-Gasse, Vienna, Austria.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Insulin receptor	A	308	Homo sapiens	Mutation(s): 0  Gene Names: INSR EC: 2.7.10.1
UniProt & NIH Common Fund Data Resources
Find proteins for P06213 (Homo sapiens) Explore P06213  Go to UniProtKB:  P06213
PHAROS:  P06213 GTEx:  ENSG00000171105

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
5JA	B [auth A]	(5R)-N-(1-{2-[4-(2-methoxyethyl)piperazin-1-yl]ethyl}-1H-pyrazol-3-yl)-5,8-dimethyl-9-phenyl-6,8-dihydro-5H-pyrazolo[3,4-h]quinazolin-2-amine C29 H37 N9 O PHQDLOFSIWRQJZ-OAQYLSRUSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
5JA	Binding MOAD:  5E1S	Kd: 12 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.26 Å
• R-Value Free: 0.262 
• R-Value Work: 0.213 
• R-Value Observed: 0.215 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.55	α = 90
b = 70.37	β = 90
c = 87.85	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
XDS	data reduction
SCALA	data scaling
PHASER	phasing
Coot	model building

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-09-30 
• Released Date: 2015-10-14 
Deposition Author(s): Kessler, D., Zahn, S., Sanderson, M., Wolkerstorfer, B.

Revision History  

• Version 1.0: 2015-10-14
  Type: Initial release
  
• Version 1.1: 2015-12-16
  Changes: Database references