Structure of PI3K gamma in complex with 1-[6-(5-methoxypyridin-3-yl)-1,3-benzothiazol-2-yl]-3-[2-(1-propyl-1H-imidazol-4-yl)ethyl]urea

Experimental Data Snapshot

  • Resolution: 2.90 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.214 

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Structural Basis for Isoform Selectivity in a Class of Benzothiazole Inhibitors of Phosphoinositide 3-Kinase gamma.

Collier, P.N.Martinez-Botella, G.Cornebise, M.Cottrell, K.M.Doran, J.D.Griffith, J.P.Mahajan, S.Maltais, F.Moody, C.S.Huck, E.P.Wang, T.Aronov, A.M.

(2015) J Med Chem 58: 517-521

  • DOI: https://doi.org/10.1021/jm500362j
  • Primary Citation of Related Structures:  
    4PS3, 4PS7, 4PS8

  • PubMed Abstract: 

    Phosphoinositide 3-kinase γ (PI3Kγ) is an attractive target to potentially treat a range of disease states. Herein, we describe the evolution of a reported phenylthiazole pan-PI3K inhibitor into a family of potent and selective benzothiazole inhibitors. Using X-ray crystallography, we discovered that compound 22 occupies a previously unreported hydrophobic binding cleft adjacent to the ATP binding site of PI3Kγ, and achieves its selectivity by exploiting natural sequence differences among PI3K isoforms in this region.

  • Organizational Affiliation

    Vertex Pharmaceuticals Inc. , 50 Northern Avenue, Boston, Massachusetts 02210, 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 isoform966Homo sapiensMutation(s): 0 
Gene Names: PI3K gammaPIK3CG
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
PHAROS:  P48736
GTEx:  ENSG00000105851 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP48736
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 2WH

Download Ideal Coordinates CCD File 
B [auth A]1-[6-(5-methoxypyridin-3-yl)-1,3-benzothiazol-2-yl]-3-[2-(1-propyl-1H-imidazol-4-yl)ethyl]urea
C22 H24 N6 O2 S
Binding Affinity Annotations 
IDSourceBinding Affinity
2WH BindingDB:  4PS3 Ki: 2 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.90 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.214 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 143.689α = 90
b = 67.788β = 96.16
c = 106.12γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-05-14
    Type: Initial release
  • Version 1.1: 2015-01-21
    Changes: Database references
  • Version 1.2: 2024-02-28
    Changes: Data collection, Database references, Derived calculations