2WI6

Orally Active 2-Amino Thienopyrimidine Inhibitors of the Hsp90 Chaperone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.18 Å
  • R-Value Free: 
    0.304 (Depositor), 0.220 (DCC) 
  • R-Value Work: 
    0.233 (Depositor), 0.230 (DCC) 
  • R-Value Observed: 
    0.237 (Depositor) 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted ZZ6Click on this verticalbar to view details

This is version 1.2 of the entry. See complete history


Literature

Combining Hit Identification Strategies: Fragment- Based and in Silico Approaches to Orally Active 2-Aminothieno[2,3-D]Pyrimidine Inhibitors of the Hsp90 Molecular Chaperone.

Brough, P.A.Barril, X.Borgognoni, J.Chene, P.Davies, N.G.M.Davis, B.Drysdale, M.J.Dymock, B.Eccles, S.A.Garcia-Echeverria, C.Fromont, C.Hayes, A.Hubbard, R.E.Jordan, A.M.Jensen, M.R.Massey, A.Merrett, A.Padfield, A.Parsons, R.Radimerski, T.Raynaud, F.I.Robertson, A.Roughley, S.D.Schoepfer, J.Simmonite, H.Sharp, S.Y.Surgenor, A.Valenti, M.Walls, S.Webb, P.Wood, M.Workman, P.Wright, L.M.

(2009) J Med Chem 52: 4794

  • DOI: https://doi.org/10.1021/jm900357y
  • Primary Citation of Related Structures:  
    2WI1, 2WI2, 2WI3, 2WI4, 2WI5, 2WI6, 2WI7

  • PubMed Abstract: 

    Inhibitors of the Hsp90 molecular chaperone are showing considerable promise as potential molecular therapeutic agents for the treatment of cancer. Here we describe novel 2-aminothieno[2,3-d]pyrimidine ATP competitive Hsp90 inhibitors, which were designed by combining structural elements of distinct low affinity hits generated from fragment-based and in silico screening exercises in concert with structural information from X-ray protein crystallography. Examples from this series have high affinity (IC50 = 50-100 nM) for Hsp90 as measured in a fluorescence polarization (FP) competitive binding assay and are active in human cancer cell lines where they inhibit cell proliferation and exhibit a characteristic profile of depletion of oncogenic proteins and concomitant elevation of Hsp72. Several examples (34a, 34d and 34i) caused tumor growth regression at well tolerated doses when administered orally in a human BT474 human breast cancer xenograft model.


  • Organizational Affiliation

    Vernalis Ltd., Granta Park, Great Abington, Cambridge CB21 6GB, UK. p.brough@vernalis.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HEAT SHOCK PROTEIN, HSP90-ALPHA236Homo sapiensMutation(s): 0 
EC: 3.6.4.10
UniProt & NIH Common Fund Data Resources
Find proteins for P07900 (Homo sapiens)
Explore P07900 
Go to UniProtKB:  P07900
PHAROS:  P07900
GTEx:  ENSG00000080824 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07900
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZZ6
Query on ZZ6

Download Ideal Coordinates CCD File 
B [auth A]2-AMINO-4-(2,4-DICHLOROPHENYL)-N-ETHYLTHIENO[2,3-D]PYRIMIDINE-6-CARBOXAMIDE
C15 H12 Cl2 N4 O S
YPEOXUOUTBMBCX-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
ZZ6 BindingDB:  2WI6 IC50: 230 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.18 Å
  • R-Value Free:  0.304 (Depositor), 0.220 (DCC) 
  • R-Value Work:  0.233 (Depositor), 0.230 (DCC) 
  • R-Value Observed: 0.237 (Depositor) 
Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.93α = 90
b = 87.957β = 90
c = 99.132γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
d*TREKdata reduction
d*TREKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted ZZ6Click on this verticalbar to view details

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2009-07-28
    Type: Initial release
  • Version 1.1: 2011-08-10
    Changes: Database references, Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance
  • Version 1.2: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description