7S8N image
Entry Detail
PDB ID:
7S8N
EMDB ID:
Title:
CryoEM structure of Gq-coupled MRGPRX2 with small molecule agonist (R)-Zinc-3573
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2021-09-18
Release Date:
2021-11-17
Method Details:
Experimental Method:
Resolution:
2.90 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Gs-mini-Gq chimera
Chain IDs:A (auth: B)
Chain Length:246
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Chain IDs:B (auth: C)
Chain Length:345
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Chain IDs:C (auth: D)
Chain Length:71
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:scFv16
Chain IDs:E
Chain Length:257
Number of Molecules:1
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Description:Mas-related G-protein coupled receptor member X2
Chain IDs:D (auth: R)
Chain Length:331
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation

Abstact

The MRGPRX family of receptors (MRGPRX1-4) is a family of mas-related G-protein-coupled receptors that have evolved relatively recently1. Of these, MRGPRX2 and MRGPRX4 are key physiological and pathological mediators of itch and related mast cell-mediated hypersensitivity reactions2-5. MRGPRX2 couples to both Gi and Gq in mast cells6. Here we describe agonist-stabilized structures of MRGPRX2 coupled to Gi1 and Gq in ternary complexes with the endogenous peptide cortistatin-14 and with a synthetic agonist probe, respectively, and the development of potent antagonist probes for MRGPRX2. We also describe a specific MRGPRX4 agonist and the structure of this agonist in a complex with MRGPRX4 and Gq. Together, these findings should accelerate the structure-guided discovery of therapeutic agents for pain, itch and mast cell-mediated hypersensitivity.

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Protein

Chemical

Disease

Primary Citation of related structures