4J6I

Discovery of thiazolobenzoxepin PI3-kinase inhibitors that spare the PI3-kinase beta isoform


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Discovery of thiazolobenzoxepin PI3-kinase inhibitors that spare the PI3-kinase beta isoform.

Staben, S.T.Ndubaku, C.Blaquiere, N.Belvin, M.Bull, R.J.Dudley, D.Edgar, K.Gray, D.Heald, R.Heffron, T.P.Jones, G.E.Jones, M.Kolesnikov, A.Lee, L.Lesnick, J.Lewis, C.Murray, J.McLean, N.J.Nonomiya, J.Olivero, A.G.Ord, R.Pang, J.Price, S.Prior, W.W.Rouge, L.Salphati, L.Sampath, D.Wallin, J.Wang, L.Wei, B.Weismann, C.Wu, P.

(2013) Bioorg.Med.Chem.Lett. 23: 2606-2613

  • DOI: 10.1016/j.bmcl.2013.02.102

  • PubMed Abstract: 
  • A series of suitable five-membered heterocyclic alternatives to thiophenes within a thienobenzoxepin class of PI3-kinase (PI3K) inhibitors was discovered. Specific thiazolobenzoxepin 8-substitution was identified that increased selectivity over PI3Kβ ...

    A series of suitable five-membered heterocyclic alternatives to thiophenes within a thienobenzoxepin class of PI3-kinase (PI3K) inhibitors was discovered. Specific thiazolobenzoxepin 8-substitution was identified that increased selectivity over PI3Kβ. PI3Kβ-sparing compound 27 (PI3Kβ Ki,app/PI3Kα Ki,app=57) demonstrated dose-dependent knockdown of pAKT, pPRAS40 and pS6RP in vivo as well as differential effects in an in vitro proliferation cell line screen compared to pan PI3K inhibitor GDC-0941. A new structure-based hypothesis for reducing inhibition of the PI3K β isoform while maintaining activity against α, δ and γ isoforms is presented.


    Organizational Affiliation

    Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, USA. stevents@gene.com




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): 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 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1JV
Query on 1JV

Download SDF File 
Download CCD File 
A
2-methyl-1-(4-{2-[1-(2,2,2-trifluoroethyl)-1H-1,2,4-triazol-5-yl]-4,5-dihydro[1]benzoxepino[5,4-d][1,3]thiazol-8-yl}-1H-pyrazol-1-yl)propan-2-ol
C22 H21 F3 N6 O2 S
VRJUJTMBOARYOG-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1JVIC50: 1.4 nM (100) BINDINGDB
1JVIC50: 1.4 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 143.671α = 90.00
b = 67.161β = 95.43
c = 106.655γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
ADSCdata collection
SCALEPACKdata scaling
PHENIXrefinement
HKL-3000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-08-28
    Type: Initial release