4FHK

Crystal Structure of PI3K-gamma in Complex with Imidazopyridazine 19e


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Discovery and optimization of potent and selective imidazopyridine and imidazopyridazine mTOR inhibitors.

Peterson, E.A.Boezio, A.A.Andrews, P.S.Boezio, C.M.Bush, T.L.Cheng, A.C.Choquette, D.Coats, J.R.Colletti, A.E.Copeland, K.W.DuPont, M.Graceffa, R.Grubinska, B.Kim, J.L.Lewis, R.T.Liu, J.Mullady, E.L.Potashman, M.H.Romero, K.Shaffer, P.L.Stanton, M.K.Stellwagen, J.C.Teffera, Y.Yi, S.Cai, T.La, D.S.

(2012) Bioorg.Med.Chem.Lett. 22: 4967-4974

  • DOI: 10.1016/j.bmcl.2012.06.033
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • mTOR is a critical regulator of cellular signaling downstream of multiple growth factors. The mTOR/PI3K/AKT pathway is frequently mutated in human cancers and is thus an important oncology target. Herein we report the evolution of our program to disc ...

    mTOR is a critical regulator of cellular signaling downstream of multiple growth factors. The mTOR/PI3K/AKT pathway is frequently mutated in human cancers and is thus an important oncology target. Herein we report the evolution of our program to discover ATP-competitive mTOR inhibitors that demonstrate improved pharmacokinetic properties and selectivity compared to our previous leads. Through targeted SAR and structure-guided design, new imidazopyridine and imidazopyridazine scaffolds were identified that demonstrated superior inhibition of mTOR in cellular assays, selectivity over the closely related PIKK family and improved in vivo clearance over our previously reported benzimidazole series.


    Organizational Affiliation

    Medicinal Chemistry, Amgen Inc., 360 Binney St., Cambridge, MA 02142, USA. epeterso@amgen.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit gamma isoform
A
960Homo sapiensMutation(s): 0 
Gene Names: PIK3CG
EC: 2.7.1.153
Find proteins for P48736 (Homo sapiens)
Go to Gene View: PIK3CG
Go to UniProtKB:  P48736
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
0U0
Query on 0U0

Download SDF File 
Download CCD File 
A
3-[2-methyl-6-(pyrazin-2-ylamino)pyrimidin-4-yl]-N-(1H-pyrazol-3-yl)imidazo[1,2-b]pyridazin-2-amine
C18 H15 N11
ABQRVDGZZXHLLT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.222 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 144.544α = 90.00
b = 67.931β = 95.40
c = 106.487γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-04-10
    Type: Initial release
  • Version 1.1: 2017-11-15
    Type: Refinement description