title: Direct Targeting of the Ras GTPase Superfamily Through Structure- Based Design.
abstract: The Ras superfamily of small monomeric GTPases includes some of the most prominent cancer targets for which no selective therapeutic agent has yet been successfully developed. The turn of the millennium saw a resurgence of efforts to target these enzymes using new and improved biophysical techniques to overcome the perceived difficulties of insurmountably high affinity for guanosine nucleotides and flat, flexible topology lacking suitable pockets for small molecule inhibitors. Further, recent investigations have begun to probe the dynamic conformational status of GTP-bound Ras, opening up new mechanisms of inhibition. While much of the literature has focused on the oncogenic Ras proteins, particularly K-Ras, these represent only a small minority of therapeutically interesting targets within the superfamily; for example, the Rab GTPases are the largest subfamily of about 70 members, and present an as yet untapped class of potential targets. The present review documents the key methodologies employed to date in structure-guided attempts to drug the Ras GTPases, and forecasts their transferability to other similarly challenging proteins in the superfamily.
authors.forename: Wenye
authors.initials: W
authors.lastname: Zhao
authors.forename: Mostafa
authors.initials: M
authors.lastname: Jamshidiha
authors.forename: Thomas
authors.initials: T
authors.lastname: Lanyon-Hogg
authors.forename: Chiara
authors.initials: C
authors.lastname: Recchi
authors.forename: Ernesto
authors.initials: E
authors.lastname: Cota
authors.affiliation: Department of Chemistry, Imperial College London, London SW7 2AZ, United Kingdom. e.tate@imperial.ac.uk.
authors.forename: Edward W
authors.initials: EW
authors.lastname: Tate
mesh_terms: D016503:Drug Delivery Systems; D015195:Drug Design; D015394:Molecular Structure; D018631:ras Proteins / Q000737:chemistry / Q000187:drug effects*
chemical_list: D018631:ras Proteins