Crystal structure of human PI3K-gamma in complex with phenylquinoline inhibitor N-{(1S)-1-[8-chloro-2-(3-fluorophenyl)quinolin-3-yl]ethyl}-9H-purin-6-amine

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.222 

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Ligand Structure Quality Assessment 

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Discovery and in Vivo Evaluation of (S)-N-(1-(7-Fluoro-2-(pyridin-2-yl)quinolin-3-yl)ethyl)-9H-purin-6-amine (AMG319) and Related PI3K delta Inhibitors for Inflammation and Autoimmune Disease.

Cushing, T.D.Hao, X.Shin, Y.Andrews, K.Brown, M.Cardozo, M.Chen, Y.Duquette, J.Fisher, B.Gonzalez-Lopez de Turiso, F.He, X.Henne, K.R.Hu, Y.L.Hungate, R.Johnson, M.G.Kelly, R.C.Lucas, B.McCarter, J.D.McGee, L.R.Medina, J.C.San Miguel, T.Mohn, D.Pattaropong, V.Pettus, L.H.Reichelt, A.Rzasa, R.M.Seganish, J.Tasker, A.S.Wahl, R.C.Wannberg, S.Whittington, D.A.Whoriskey, J.Yu, G.Zalameda, L.Zhang, D.Metz, D.P.

(2015) J Med Chem 58: 480-511

  • DOI: https://doi.org/10.1021/jm501624r
  • Primary Citation of Related Structures:  
    4WWN, 4WWO, 4WWP

  • PubMed Abstract: 

    The development and optimization of a series of quinolinylpurines as potent and selective PI3Kδ kinase inhibitors with excellent physicochemical properties are described. This medicinal chemistry effort led to the identification of 1 (AMG319), a compound with an IC50 of 16 nM in a human whole blood assay (HWB), excellent selectivity over a large panel of protein kinases, and a high level of in vivo efficacy as measured by two rodent disease models of inflammation.

  • Organizational Affiliation

    Department of Therapeutic Discovery, ‡Department of Pharmacokinetics and Drug Metabolism, and §Department of Pharmaceutics Research and Development, Amgen Inc. , 1120 Veterans Boulevard, South San Francisco, California 94080, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit gamma isoform959Homo sapiensMutation(s): 0 
Gene Names: PIK3CG
EC: (PDB Primary Data), (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P48736 (Homo sapiens)
Explore P48736 
Go to UniProtKB:  P48736
GTEx:  ENSG00000105851 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP48736
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.222 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 145.901α = 90
b = 68.175β = 95.39
c = 107.381γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
DENZOdata reduction

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-12-17
    Type: Initial release
  • Version 1.1: 2015-01-28
    Changes: Database references
  • Version 1.2: 2017-11-22
    Changes: Database references, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary
  • Version 1.3: 2024-02-28
    Changes: Data collection, Database references