4KZC

Structure of PI3K gamma with Imidazopyridine inhibitors


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure guided optimization of a fragment hit to imidazopyridine inhibitors of PI3K.

Pecchi, S.Ni, Z.J.Han, W.Smith, A.Lan, J.Burger, M.Merritt, H.Wiesmann, M.Chan, J.Kaufman, S.Knapp, M.S.Janssen, J.Huh, K.Voliva, C.F.

(2013) Bioorg.Med.Chem.Lett. 23: 4652-4656

  • DOI: 10.1016/j.bmcl.2013.06.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • PI3 kinases are a family of lipid kinases mediating numerous cell processes such as proliferation, migration and differentiation. The PI3 Kinase pathway is often de-regulated in cancer through PI3Kα overexpression, gene amplification, mutations and P ...

    PI3 kinases are a family of lipid kinases mediating numerous cell processes such as proliferation, migration and differentiation. The PI3 Kinase pathway is often de-regulated in cancer through PI3Kα overexpression, gene amplification, mutations and PTEN phosphatase deletion. PI3K inhibitors represent therefore an attractive therapeutic modality for cancer treatment. Herein we describe how the potency of a benzothiazole fragment hit was quickly improved based on structural information and how this early chemotype was further optimized through scaffold hopping. This effort led to the identification of a series of 2-acetamido-5-heteroaryl imidazopyridines showing potent in vitro activity against all class I PI3Ks and attractive pharmacokinetic properties.


    Organizational Affiliation

    Global Discovery Chemistry/Oncology and Exploratory Chemistry, Novartis Institutes for Biomedical Research, Emeryville, CA, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit gamma isoform
A
966Homo sapiensMutation(s): 1 
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
1UK
Query on 1UK

Download SDF File 
Download CCD File 
A
N-{6-[6-amino-5-(trifluoromethyl)pyridin-3-yl]imidazo[1,2-a]pyridin-2-yl}acetamide
C15 H12 F3 N5 O
TVUPSIBSWDXJGQ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1UKIC50: 8.2 nM (99) BINDINGDB
1UKIC50: 8.2 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.235 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 146.383α = 90.00
b = 68.313β = 95.24
c = 108.161γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
BOSdata collection
XSCALEdata scaling
BUSTERrefinement
SCALAdata scaling
TNTrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-17
    Type: Initial release
  • Version 1.1: 2013-08-28
    Type: Database references