2VCI image
Entry Detail
PDB ID:
2VCI
Keywords:
Title:
4,5 Diaryl Isoxazole Hsp90 Chaperone Inhibitors: Potential Therapeutic Agents for the Treatment of Cancer
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2007-09-24
Release Date:
2007-12-11
Method Details:
Experimental Method:
Resolution:
2.00 Å
R-Value Free:
0.27
R-Value Work:
0.20
R-Value Observed:
0.21
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

Abstact

Inhibitors of the Hsp90 molecular chaperone are showing considerable promise as potential chemotherapeutic agents for cancer. Here, we describe the structure-based design, synthesis, structure-activity relationships and pharmacokinetics of potent small-molecule inhibitors of Hsp90 based on the 4,5-diarylisoxazole scaffold. Analogues from this series have high affinity for Hsp90, as measured in a fluorescence polarization (FP) competitive binding assay, and are active in cancer cell lines where they inhibit proliferation and exhibit a characteristic profile of depletion of oncogenic proteins and concomitant elevation of Hsp72. Compound 40f (VER-52296/NVP-AUY922) is potent in the Hsp90 FP binding assay (IC50 = 21 nM) and inhibits proliferation of various human cancer cell lines in vitro, with GI50 averaging 9 nM. Compound 40f is retained in tumors in vivo when administered i.p., as evaluated by cassette dosing in tumor-bearing mice. In a human colon cancer xenograft model, 40f inhibits tumor growth by approximately 50%.

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