The extracellular surface of the GLP-1 receptor is a molecular trigger for biased agonism

Wootten, Denise, Reynolds, Christopher A., Smith, Kevin J., Mobarec, Juan C., Koole, Cassandra, Savage, Emilia E., Pabreja, Kavita, Simms, John, Sridhar, Rohan, Furness, Sebastian G.B., Liu, Mengjie, Thompson, Philip E., Miller, Laurence J., Christopoulos, Arthur and Sexton, Patrick M. (2016). The extracellular surface of the GLP-1 receptor is a molecular trigger for biased agonism. Cell, 165 (7), pp. 1632-1643.

Abstract

Ligand-directed signal bias offers opportunities for sculpting molecular events, with the promise of better, safer therapeutics. Critical to the exploitation of signal bias is an understanding of the molecular events coupling ligand binding to intracellular signaling. Activation of class B G protein-coupled receptors is driven by interaction of the peptide N terminus with the receptor core. To understand how this drives signaling, we have used advanced analytical methods that enable separation of effects on pathway-specific signaling from those that modify agonist affinity and mapped the functional consequence of receptor modification onto three-dimensional models of a receptor-ligand complex. This yields molecular insights into the initiation of receptor activation and the mechanistic basis for biased agonism. Our data reveal that peptide agonists can engage different elements of the receptor extracellular face to achieve effector coupling and biased signaling providing a foundation for rational design of biased agonists.

Publication DOI: https://doi.org/10.1016/j.cell.2016.05.023
Divisions: Life & Health Sciences > Biosciences
Additional Information: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funding: NHMRC (1061044; 1065410 and 1055134); BBSRC (BB/M006883/1); and MRC [Research Leader Fellowship (G1001812)]. Supplemental Information includes Supplemental Experimental Procedures, seven figures, six tables, one data file, and two movies and can be found with this article online at http://dx.doi.org/10.1016/j.cell.2016.05.023
Uncontrolled Keywords: Biochemistry, Genetics and Molecular Biology(all)
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2016-06-16
Authors: Wootten, Denise
Reynolds, Christopher A.
Smith, Kevin J.
Mobarec, Juan C.
Koole, Cassandra
Savage, Emilia E.
Pabreja, Kavita
Simms, John
Sridhar, Rohan
Furness, Sebastian G.B.
Liu, Mengjie
Thompson, Philip E.
Miller, Laurence J.
Christopoulos, Arthur
Sexton, Patrick M.

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