Dihydroxylphenyl amides as inhibitors of the Hsp90 molecular chaperone
[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
Information from X-ray crystal structures were used to optimize the potency of a HTS hit in a Hsp90 competitive binding assay. A class of novel and potent small molecule Hsp90 inhibitors were thereby identified. Enantio-pure compounds 31 and 33 were potent in PGA-based competitive binding assay and inhibited proliferation of various human cancer cell lines in vitro, with IC(50) values averaging 20 nM.
Dihydroxylphenyl amides as inhibitors of the Hsp90 molecular chaperone.,Kung PP, Funk L, Meng J, Collins M, Zhou JZ, Johnson MC, Ekker A, Wang J, Mehta P, Yin MJ, Rodgers C, Davies JF 2nd, Bayman E, Smeal T, Maegley KA, Gehring MR Bioorg Med Chem Lett. 2008 Dec 1;18(23):6273-8. Epub 2008 Sep 26. PMID:18929486
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.