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'''GELDANAMYCIN BOUND TO THE HSP90 GELDANAMYCIN-BINDING DOMAIN''' | '''GELDANAMYCIN BOUND TO THE HSP90 GELDANAMYCIN-BINDING DOMAIN''' | ||
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[[Category: Russo, A A.]] | [[Category: Russo, A A.]] | ||
[[Category: Stebbins, C E.]] | [[Category: Stebbins, C E.]] | ||
[[Category: | [[Category: Chaperone protein]] | ||
[[Category: | [[Category: Geldanamycin]] | ||
[[Category: | [[Category: Heat shock]] | ||
[[Category: | [[Category: Signal transduction]] | ||
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Revision as of 13:14, 3 May 2008
GELDANAMYCIN BOUND TO THE HSP90 GELDANAMYCIN-BINDING DOMAIN
Overview
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.
About this Structure
1YET is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure of an Hsp90-geldanamycin complex: targeting of a protein chaperone by an antitumor agent., Stebbins CE, Russo AA, Schneider C, Rosen N, Hartl FU, Pavletich NP, Cell. 1997 Apr 18;89(2):239-50. PMID:9108479 Page seeded by OCA on Sat May 3 16:14:03 2008
