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Cryo-EM structure of the human histamine H(1) receptor/G(q) complex

Histamine receptors play important roles in various pathophysiological conditions and are effective targets for anti-allergy treatment, however the mechanism of receptor activation remain elusive. Here, we present the cryo-electron microscopy (cryo-EM) structure of the human H(1)R in complex with a...

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Autores principales: Xia, Ruixue, Wang, Na, Xu, Zhenmei, Lu, Yang, Song, Jing, Zhang, Anqi, Guo, Changyou, He, Yuanzheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8027608/
https://www.ncbi.nlm.nih.gov/pubmed/33828102
http://dx.doi.org/10.1038/s41467-021-22427-2
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author Xia, Ruixue
Wang, Na
Xu, Zhenmei
Lu, Yang
Song, Jing
Zhang, Anqi
Guo, Changyou
He, Yuanzheng
author_facet Xia, Ruixue
Wang, Na
Xu, Zhenmei
Lu, Yang
Song, Jing
Zhang, Anqi
Guo, Changyou
He, Yuanzheng
author_sort Xia, Ruixue
collection PubMed
description Histamine receptors play important roles in various pathophysiological conditions and are effective targets for anti-allergy treatment, however the mechanism of receptor activation remain elusive. Here, we present the cryo-electron microscopy (cryo-EM) structure of the human H(1)R in complex with a G(q) protein in an active conformation via a NanoBiT tethering strategy. The structure reveals that histamine activates receptor via interacting with the key residues of both transmembrane domain 3 (TM3) and TM6 to squash the binding pocket on the extracellular side and to open the cavity on the intracellular side for G(q) engagement in a model of “squash to activate and expand to deactivate”. The structure also reveals features for G(q) coupling, including the interaction between intracellular loop 2 (ICL2) and the αN-β junction of G(q/11) protein. The detailed analysis of our structure will provide a framework for understanding G-protein coupling selectivity and clues for designing novel antihistamines.
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spelling pubmed-80276082021-04-21 Cryo-EM structure of the human histamine H(1) receptor/G(q) complex Xia, Ruixue Wang, Na Xu, Zhenmei Lu, Yang Song, Jing Zhang, Anqi Guo, Changyou He, Yuanzheng Nat Commun Article Histamine receptors play important roles in various pathophysiological conditions and are effective targets for anti-allergy treatment, however the mechanism of receptor activation remain elusive. Here, we present the cryo-electron microscopy (cryo-EM) structure of the human H(1)R in complex with a G(q) protein in an active conformation via a NanoBiT tethering strategy. The structure reveals that histamine activates receptor via interacting with the key residues of both transmembrane domain 3 (TM3) and TM6 to squash the binding pocket on the extracellular side and to open the cavity on the intracellular side for G(q) engagement in a model of “squash to activate and expand to deactivate”. The structure also reveals features for G(q) coupling, including the interaction between intracellular loop 2 (ICL2) and the αN-β junction of G(q/11) protein. The detailed analysis of our structure will provide a framework for understanding G-protein coupling selectivity and clues for designing novel antihistamines. Nature Publishing Group UK 2021-04-07 /pmc/articles/PMC8027608/ /pubmed/33828102 http://dx.doi.org/10.1038/s41467-021-22427-2 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Xia, Ruixue
Wang, Na
Xu, Zhenmei
Lu, Yang
Song, Jing
Zhang, Anqi
Guo, Changyou
He, Yuanzheng
Cryo-EM structure of the human histamine H(1) receptor/G(q) complex
title Cryo-EM structure of the human histamine H(1) receptor/G(q) complex
title_full Cryo-EM structure of the human histamine H(1) receptor/G(q) complex
title_fullStr Cryo-EM structure of the human histamine H(1) receptor/G(q) complex
title_full_unstemmed Cryo-EM structure of the human histamine H(1) receptor/G(q) complex
title_short Cryo-EM structure of the human histamine H(1) receptor/G(q) complex
title_sort cryo-em structure of the human histamine h(1) receptor/g(q) complex
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8027608/
https://www.ncbi.nlm.nih.gov/pubmed/33828102
http://dx.doi.org/10.1038/s41467-021-22427-2
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