9LRS | pdb_00009lrs

The structure of MRGPRX4 with PSB-18061

• PDB DOI: https://doi.org/10.2210/pdb9LRS/pdb
• EM Map EMD-63341: EMDB EMDataResource

• Classification: SIGNALING PROTEIN
• Organism(s): Escherichia coli, Homo sapiens, Mus musculus
• Expression System: Spodoptera frugiperda
• Mutation(s): Yes 


• Deposited: 2025-02-01 Released: 2026-02-04 
• Deposition Author(s): Cao, C., Roth, B.L.
• Funding Organization(s): National Institutes of Health/National Institute of Mental Health (NIH/NIMH), National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.83 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

The structure of MRGPRX4 with PSB-18061

Cao, C., Roth, B.L.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A1B1C1D1E1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 157.94 kDa 
• Atom Count: 8,137 
• Modeled Residue Count: 1,089 
• Deposited Residue Count: 1,414 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Soluble cytochrome b562,Mas-related G-protein coupled receptor member X4	A [auth R]	472	Escherichia coli, Homo sapiens This entity is chimeric	Mutation(s): 1  Gene Names: cybC, MRGPRX4, MRGX4, SNSR5, SNSR6
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli) Explore P0ABE7  Go to UniProtKB:  P0ABE7
Find proteins for Q96LA9 (Homo sapiens) Explore Q96LA9  Go to UniProtKB:  Q96LA9
PHAROS:  Q96LA9 GTEx:  ENSG00000179817
UniProt Groups	Q96LA9P0ABE7

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Gs-mini-Gq chimera	B	246	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	C	358	Homo sapiens	Mutation(s): 0  Gene Names: GNB1
UniProt & NIH Common Fund Data Resources
Find proteins for P62873 (Homo sapiens) Explore P62873  Go to UniProtKB:  P62873
PHAROS:  P62873 GTEx:  ENSG00000078369

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	D	71	Homo sapiens	Mutation(s): 0  Gene Names: GNG2
UniProt & NIH Common Fund Data Resources
Find proteins for P59768 (Homo sapiens) Explore P59768  Go to UniProtKB:  P59768
PHAROS:  P59768 GTEx:  ENSG00000186469

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
scFv16	E	267	Mus musculus	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
A1L7J (Subject of Investigation/LOI)	F [auth R]	4-[7-methyl-2,6-bis(oxidanylidene)-1-prop-2-ynyl-8-[2-[3-(trifluoromethyl)phenyl]ethyl]purin-3-yl]butylphosphonic acid C22 H24 F3 N4 O5 P HMTOKAHHYDQCJD-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.83 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.18.2_3874

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-02-04 
Deposition Author(s): Cao, C., Roth, B.L.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)	United States	RO1DA055656
National Natural Science Foundation of China (NSFC)	China	--

Revision History  

• Version 1.0: 2026-02-04
  Type: Initial release