title: The Hsp90 molecular chaperone: an open and shut case for treatment.
abstract: The molecular chaperone Hsp90 (90 kDa heat-shock protein) is a remarkably versatile protein involved in the stress response and in normal homoeostatic control mechanisms. It interacts with 'client proteins', including protein kinases, transcription factors and others, and either facilitates their stabilization and activation or directs them for proteasomal degradation. By this means, Hsp90 displays a multifaceted ability to influence signal transduction, chromatin remodelling and epigenetic regulation, development and morphological evolution. Hsp90 operates as a dimer in a conformational cycle driven by ATP binding and hydrolysis at the N-terminus. The cycle is also regulated by a group of co-chaperones and accessory proteins. Here we review the biology of the Hsp90 molecular chaperone, emphasizing recent progress in our understanding of structure-function relationships and the identification of new client proteins. In addition we describe the exciting progress that has been made in the development of Hsp90 inhibitors, which are now showing promise in the clinic for cancer treatment. We also identify the gaps in our current understanding and highlight important topics for future research.
authors.affiliation: Section of Structural Biology, The Institute of Cancer Research, Chester Beatty Laboratories, 237 Fulham Road, London SW3 6JB, UK. laurence.pearl@icr.ac.uk
authors.forename: Laurence H
authors.initials: LH
authors.lastname: Pearl
authors.forename: Chrisostomos
authors.initials: C
authors.lastname: Prodromou
authors.forename: Paul
authors.initials: P
authors.lastname: Workman
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D018841:HSP90 Heat-Shock Proteins / Q000737:chemistry / Q000502:physiology*; D006801:Humans; D006868:Hydrolysis; D011487:Protein Conformation
chemical_list: D018841:HSP90 Heat-Shock Proteins; D000255:Adenosine Triphosphate