3S2A

Crystal structure of PI3K-gamma in complex with a quinoline inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Phospshoinositide 3-Kinase (PI3K)/Mammalian Target of Rapamycin (mTOR) Dual Inhibitors: Discovery and Structure-Activity Relationships of a Series of Quinoline and Quinoxaline Derivatives.

Nishimura, N.Siegmund, A.Liu, L.Yang, K.Bryan, M.C.Andrews, K.L.Bo, Y.Booker, S.K.Caenepeel, S.Freeman, D.Liao, H.McCarter, J.Mullady, E.L.San Miguel, T.Subramanian, R.Tamayo, N.Wang, L.Whittington, D.A.Zalameda, L.Zhang, N.Hughes, P.E.Norman, M.H.

(2011) J Med Chem 54: 4735-4751

  • DOI: https://doi.org/10.1021/jm200386s
  • Primary Citation of Related Structures:  
    3S2A

  • PubMed Abstract: 

    The phosphoinositide 3-kinase (PI3K) family catalyzes the ATP-dependent phosphorylation of the 3'-hydroxyl group of phosphatidylinositols and plays an important role in cell growth and survival. There is abundant evidence demonstrating that PI3K signaling is dysregulated in many human cancers, suggesting that therapeutics targeting the PI3K pathway may have utility for the treatment of cancer. Our efforts to identify potent, efficacious, and orally available PI3K/mammalian target of rapamycin (mTOR) dual inhibitors resulted in the discovery of a series of substituted quinolines and quinoxalines derivatives. In this report, we describe the structure-activity relationships, selectivity, and pharmacokinetic data of this series and illustrate the in vivo pharmacodynamic and efficacy data for a representative compound.


  • Organizational Affiliation

    Department of Chemistry Research and Discovery, Amgen Inc., Thousand Oaks, California 91320-1799, United States. nobukon@amgen.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit gamma isoform960Homo sapiensMutation(s): 0 
Gene Names: PIK3CG
EC: 2.7.1.153
UniProt & NIH Common Fund Data Resources
Find proteins for P48736 (Homo sapiens)
Explore P48736 
Go to UniProtKB:  P48736
PHAROS:  P48736
GTEx:  ENSG00000105851 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP48736
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
2NQ BindingDB:  3S2A IC50: 8.1 (nM) from 1 assay(s)
PDBBind:  3S2A IC50: 8.1 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 144.465α = 90
b = 68.169β = 94.8
c = 107.347γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
BOSdata collection
HKL-2000data reduction
AMoREphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-07-20
    Changes: Database references
  • Version 1.3: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description