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The best of both worlds? Bitopic orthosteric/allosteric ligands of g protein-coupled receptors

Valant, Celine; Lane, Jonathan R; Sexton, Patrick M; Christopoulos, Arthur


Celine Valant

Jonathan R Lane

Patrick M Sexton

Arthur Christopoulos


It is now acknowledged that G protein-coupled receptors, the largest class of drug targets, adopt multiple active states that can be preferentially stabilized by orthosteric ligands or allosteric modulators, thus giving rise to the phenomenon of pathway-biased signaling. In the past few years, researchers have begun to explore the potential of linking orthosteric and allosteric pharmacophores to yield bitopic hybrid ligands. This approach is an extension of the more traditional bivalent ligand concept and shares some of the same challenges, including the choice and role of the linker between the two pharmacophores and the validation of mechanism of action. Nonetheless, the promise of bitopic ligands is the generation of novel chemical tools that have improved affinity and/or selectivity profiles. Previously identified functionally selective compounds (and medicines) also may act via a bitopic mechanism, suggesting that the phenomenon is more widespread than currently appreciated.

Journal Article Type Review
Online Publication Date Sep 9, 2011
Publication Date 2012-02
Deposit Date Apr 22, 2020
Print ISSN 0362-1642
Publisher Annual Reviews
Peer Reviewed Peer Reviewed
Volume 52
Pages 153-178
Public URL
Publisher URL

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