Crystal Structure of Benzamide Tetrahydro-4H-carbazol-4-one bound to Hsp90
[HS90A_HUMAN] Molecular chaperone that promotes the maturation, structural maintenance and proper regulation of specific target proteins involved for instance in cell cycle control and signal transduction. Undergoes a functional cycle that is linked to its ATPase activity. This cycle probably induces conformational changes in the client proteins, thereby causing their activation. Interacts dynamically with various co-chaperones that modulate its substrate recognition, ATPase cycle and chaperone function. 
Publication Abstract from PubMed
Hsp90 maintains the conformational stability of multiple proteins implicated in oncogenesis and has emerged as a target for chemotherapy. We report here the discovery of a novel small molecule scaffold that inhibits Hsp90. X-ray data show that the scaffold binds competitively at the ATP site on Hsp90. Cellular proliferation and client assays demonstrate that members of the series are able to inhibit Hsp90 at nanomolar concentrations.
Discovery of benzamide tetrahydro-4H-carbazol-4-ones as novel small molecule inhibitors of Hsp90.,Barta TE, Veal JM, Rice JW, Partridge JM, Fadden RP, Ma W, Jenks M, Geng L, Hanson GJ, Huang KH, Barabasz AF, Foley BE, Otto J, Hall SE Bioorg Med Chem Lett. 2008 Jun 15;18(12):3517-21. Epub 2008 May 9. PMID:18511277
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.