5E1S

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.264 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

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

  • DOI: 10.1158/1535-7163.MCT-15-0539

  • 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 centra ...

    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. michael.sanderson@boehringer-ingelheim.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin receptor
A
308Homo sapiensMutation(s): 0 
Gene Names: INSR
EC: 2.7.10.1
Find proteins for P06213 (Homo sapiens)
Go to Gene View: INSR
Go to UniProtKB:  P06213
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
5JA
Query on 5JA

Download SDF File 
Download CCD File 
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
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.264 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.550α = 90.00
b = 70.370β = 90.00
c = 87.850γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
Cootmodel building
SCALAdata scaling
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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