2WI4 image
Entry Detail
PDB ID:
2WI4
Keywords:
Title:
Orally Active 2-Amino Thienopyrimidine Inhibitors of the Hsp90 Chaperone
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2009-05-08
Release Date:
2009-07-28
Method Details:
Experimental Method:
Resolution:
2.40 Å
R-Value Free:
0.28
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
I 2 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:HEAT SHOCK PROTEIN, HSP 90-ALPHA
Chain IDs:A
Chain Length:236
Number of Molecules:1
Biological Source:HOMO SAPIENS
Ligand Molecules
Primary Citation
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.
J.Med.Chem. 52 4794 ? (2009)
PMID: 19610616 DOI: 10.1021/JM900357Y

Abstact

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.

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