Ligand recognition and allosteric modulation of the human MRGPRX1 receptor

The human MAS-related G protein–coupled receptor X1 (MRGPRX1) is preferentially expressed in the small-diameter primary sensory neurons and involved in the mediation of nociception and pruritus. Central activation of MRGPRX1 by the endogenous opioid peptide fragment BAM8-22 and its positive alloster...

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Veröffentlicht in:Nature chemical biology 2023-04, Vol.19 (4), p.416-422
Hauptverfasser: Liu, Yongfeng, Cao, Can, Huang, Xi-Ping, Gumpper, Ryan H., Rachman, Moira M., Shih, Sheng-Luen, Krumm, Brian E., Zhang, Shicheng, Shoichet, Brian K., Fay, Jonathan F., Roth, Bryan L.
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container_issue 4
container_start_page 416
container_title Nature chemical biology
container_volume 19
creator Liu, Yongfeng
Cao, Can
Huang, Xi-Ping
Gumpper, Ryan H.
Rachman, Moira M.
Shih, Sheng-Luen
Krumm, Brian E.
Zhang, Shicheng
Shoichet, Brian K.
Fay, Jonathan F.
Roth, Bryan L.
description The human MAS-related G protein–coupled receptor X1 (MRGPRX1) is preferentially expressed in the small-diameter primary sensory neurons and involved in the mediation of nociception and pruritus. Central activation of MRGPRX1 by the endogenous opioid peptide fragment BAM8-22 and its positive allosteric modulator ML382 has been shown to effectively inhibit persistent pain, making MRGPRX1 a promising target for non-opioid pain treatment. However, the activation mechanism of MRGPRX1 is still largely unknown. Here we report three high-resolution cryogenic electron microscopy structures of MRGPRX1–Gαq in complex with BAM8-22 alone, with BAM8-22 and ML382 simultaneously as well as with a synthetic agonist compound-16. These structures reveal the agonist binding mode for MRGPRX1 and illuminate the structural requirements for positive allosteric modulation. Collectively, our findings provide a molecular understanding of the activation and allosteric modulation of the MRGPRX1 receptor, which could facilitate the structure-based design of non-opioid pain-relieving drugs. The cryo-EM structures of MRGPRX1–Gq complexes are reported, which revealed the activation and allosteric modulation mechanism of human MRGPRX1 receptor, which may enable the structure-based identification of novel analgesics.
doi_str_mv 10.1038/s41589-022-01173-6
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Central activation of MRGPRX1 by the endogenous opioid peptide fragment BAM8-22 and its positive allosteric modulator ML382 has been shown to effectively inhibit persistent pain, making MRGPRX1 a promising target for non-opioid pain treatment. However, the activation mechanism of MRGPRX1 is still largely unknown. Here we report three high-resolution cryogenic electron microscopy structures of MRGPRX1–Gαq in complex with BAM8-22 alone, with BAM8-22 and ML382 simultaneously as well as with a synthetic agonist compound-16. These structures reveal the agonist binding mode for MRGPRX1 and illuminate the structural requirements for positive allosteric modulation. Collectively, our findings provide a molecular understanding of the activation and allosteric modulation of the MRGPRX1 receptor, which could facilitate the structure-based design of non-opioid pain-relieving drugs. 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subjects 631/1647/2258
631/80/86
631/92/612/194
631/92/613
Agonists
Allosteric properties
Allosteric Regulation
Allosteric Site
Analgesics
Biochemical Engineering
Biochemistry
Bioorganic Chemistry
Cell Biology
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Drug development
Electron microscopy
Humans
Ligands
Modulation
Narcotics
Opioid receptors
Pain
Pain perception
Pruritus
Receptors
Receptors, G-Protein-Coupled - metabolism
Sensory neurons
title Ligand recognition and allosteric modulation of the human MRGPRX1 receptor
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