Download MendeleyCrystal 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
- DOI: https://doi.org/10.1016/s0092-8674(00)80203-2
- Primary Citation of Related Structures:
1YER, 1YES, 1YET - PubMed Abstract:
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.
Organizational Affiliation:
Department of Biochemistry and Structural Biology, Cornell University Graduate School of Medical Sciences, New York, New York 10021, USA.
