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https://hdl.handle.net/2440/75408
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Type: | Journal article |
Title: | Coupling of receptor conformation and ligand orientation determine graded activity |
Author: | Bruning, J. Parent, A. Gil, G. Zhao, M. Nowak, J. Pace, M. Smith, C. Afonine, P. Adams, P. Katzenellenbogen, J. Nettles, K. |
Citation: | Nature Chemical Biology, 2010; 6(11):837-843 |
Publisher: | Nature Publishing Group |
Issue Date: | 2010 |
ISSN: | 1552-4450 1552-4469 |
Statement of Responsibility: | John B. Bruning, Alexander A. Parent, German Gil, Min Zhao, Jason Nowak, Margaret C. Pace, Carolyn L. Smith, Pavel V. Afonine, Paul D. Adams, John A. Katzenellenbogen and Kendall W. Nettles |
Abstract: | Small molecules stabilize specific protein conformations from a larger ensemble, enabling molecular switches that control diverse cellular functions. We show here that the converse also holds true: the conformational state of the estrogen receptor can direct distinct orientations of the bound ligand. 'Gain-of-allostery' mutations that mimic the effects of ligand in driving protein conformation allowed crystallization of the partial agonist ligand WAY-169916 with both the canonical active and inactive conformations of the estrogen receptor. The intermediate transcriptional activity induced by WAY-169916 is associated with the ligand binding differently to the active and inactive conformations of the receptor. Analyses of a series of chemical derivatives demonstrated that altering the ensemble of ligand binding orientations changes signaling output. The coupling of different ligand binding orientations to distinct active and inactive protein conformations defines a new mechanism for titrating allosteric signaling activity. |
Keywords: | Cell Line, Tumor Humans Breast Neoplasms Pyrazoles Receptors, Estrogen Ligands Reverse Transcriptase Polymerase Chain Reaction Signal Transduction Allosteric Regulation Binding Sites Protein Conformation Dose-Response Relationship, Drug Mutation Time Factors |
Rights: | © 2010 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
DOI: | 10.1038/nchembio.451 |
Published version: | http://dx.doi.org/10.1038/nchembio.451 |
Appears in Collections: | Aurora harvest Molecular and Biomedical Science publications |
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