Crystal structure of an Hsp90-geldanamycin complex: targeting of a protein chaperone by an antitumor agent.Stebbins, C.E., Russo, A.A., Schneider, C., Rosen, N., Hartl, F.U., Pavletich, N.P.
(1997) Cell 89: 239-250
- PubMed: 9108479
- Primary Citation of Related Structures:  1YER, 1YES
- PubMed Abstract:
- Inhibition of Heat Shock Protein Hsp90-Pp60V-Src Heteroprotein Complex Formation by Benzoquinone Ansamycins: Essential Role for Stress Proteins in Oncogenic Transformation
Whitesell, L.,Mimnaugh, E.G.,De Costa, B.,Myers, C.E.,Neckers, L.M.
(1994) Proc.Natl.Acad.Sci.USA 91: 8324
- Geldanamycin, a New Antibiotic
Deboer, C.,Meulman, P.A.,Wnuk, R.J.,Peterson, D.H.
(1970) J.Antibiot. 23: 442
The Hsp90 chaperone is required for the activation of several families of eukaryotic protein kinases and nuclear hormone receptors, many of which are protooncogenic and play a prominent role in cancer. The geldanamycin antibiotic has antiproliferativ ...
The Hsp90 chaperone is required for the activation of several families of eukaryotic protein kinases and nuclear hormone receptors, many of which are protooncogenic and play a prominent role in cancer. The geldanamycin antibiotic has antiproliferative and antitumor effects, as it binds to Hsp90, inhibits the Hsp90-mediated conformational maturation/refolding reaction, and results in the degradation of Hsp90 substrates. The structure of the geldanamycin-binding domain of Hsp90 (residues 9-232) reveals a pronounced pocket, 15 A deep, that is highly conserved across species. Geldanamycin binds inside this pocket, adopting a compact structure similar to that of a polypeptide chain in a turn conformation. This, and the pocket's similarity to substrate-binding sites, suggest that the pocket binds a portion of the polypeptide substrate and participates in the conformational maturation/refolding reaction.
Department of Biochemistry and Structural Biology, Cornell University Graduate School of Medical Sciences, New York, New York 10021, USA.