Predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.

Understanding the binding mode of agonists to adrenergic receptors is crucial to enabling improved rational design of new therapeutic agents. However, so far the high conformational flexibility of G protein-coupled receptors has been an obstacle to obtaining structural information on agonist binding...

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Autores principales:	Stefano Vanni, Marilisa Neri, Ivano Tavernelli, Ursula Rothlisberger
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/793fc65429c64147b03e9fcb0b17908d
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spelling	oai:doaj.org-article:793fc65429c64147b03e9fcb0b17908d2021-11-18T05:50:47ZPredicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.1553-734X1553-735810.1371/journal.pcbi.1001053https://doaj.org/article/793fc65429c64147b03e9fcb0b17908d2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21253557/pdf/?tool=EBIhttps://doaj.org/toc/1553-734Xhttps://doaj.org/toc/1553-7358Understanding the binding mode of agonists to adrenergic receptors is crucial to enabling improved rational design of new therapeutic agents. However, so far the high conformational flexibility of G protein-coupled receptors has been an obstacle to obtaining structural information on agonist binding at atomic resolution. In this study, we report microsecond classical molecular dynamics simulations of β(1) and β(2) adrenergic receptors bound to the full agonist isoprenaline and in their unliganded form. These simulations show a novel agonist binding mode that differs from the one found for antagonists in the crystal structures and from the docking poses reported by in silico docking studies performed on rigid receptors. Internal water molecules contribute to the stabilization of novel interactions between ligand and receptor, both at the interface of helices V and VI with the catechol group of isoprenaline as well as at the interface of helices III and VII with the ethanolamine moiety of the ligand. Despite the fact that the characteristic N-C-C-OH motif is identical in the co-crystallized ligands and in the full agonist isoprenaline, the interaction network between this group and the anchor site formed by Asp(3.32) and Asn(7.39) is substantially different between agonists and inverse agonists/antagonists due to two water molecules that enter the cavity and contribute to the stabilization of a novel network of interactions. These new binding poses, together with observed conformational changes in the extracellular loops, suggest possible determinants of receptor specificity.Stefano VanniMarilisa NeriIvano TavernelliUrsula RothlisbergerPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Computational Biology, Vol 7, Iss 1, p e1001053 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Stefano Vanni Marilisa Neri Ivano Tavernelli Ursula Rothlisberger Predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.
description	Understanding the binding mode of agonists to adrenergic receptors is crucial to enabling improved rational design of new therapeutic agents. However, so far the high conformational flexibility of G protein-coupled receptors has been an obstacle to obtaining structural information on agonist binding at atomic resolution. In this study, we report microsecond classical molecular dynamics simulations of β(1) and β(2) adrenergic receptors bound to the full agonist isoprenaline and in their unliganded form. These simulations show a novel agonist binding mode that differs from the one found for antagonists in the crystal structures and from the docking poses reported by in silico docking studies performed on rigid receptors. Internal water molecules contribute to the stabilization of novel interactions between ligand and receptor, both at the interface of helices V and VI with the catechol group of isoprenaline as well as at the interface of helices III and VII with the ethanolamine moiety of the ligand. Despite the fact that the characteristic N-C-C-OH motif is identical in the co-crystallized ligands and in the full agonist isoprenaline, the interaction network between this group and the anchor site formed by Asp(3.32) and Asn(7.39) is substantially different between agonists and inverse agonists/antagonists due to two water molecules that enter the cavity and contribute to the stabilization of a novel network of interactions. These new binding poses, together with observed conformational changes in the extracellular loops, suggest possible determinants of receptor specificity.
format	article
author	Stefano Vanni Marilisa Neri Ivano Tavernelli Ursula Rothlisberger
author_facet	Stefano Vanni Marilisa Neri Ivano Tavernelli Ursula Rothlisberger
author_sort	Stefano Vanni
title	Predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.
title_short	Predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.
title_full	Predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.
title_fullStr	Predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.
title_full_unstemmed	Predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.
title_sort	predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/793fc65429c64147b03e9fcb0b17908d
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Predicting novel binding modes of agonists to β adrenergic receptors using all-atom molecular dynamics simulations.

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