23CS | pdb_000023cs

Cryo-EM structure of the MRGPRX4-miniGsq complex in the apo state

• PDB DOI: https://doi.org/10.2210/pdb23CS/pdb
• EM Map EMD-68868: EMDB EMDataResource

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


• Deposited: 2026-02-01 Released: 2026-10-14 
• Deposition Author(s): Cao, C., Wang, C., Zhang, M., Ji, Z.
• Funding Organization(s): Ministry of Science and Technology (MoST, China), National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.89 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of the MRGPRX4-miniGsq complex in the apo state

Zhang, M.

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: 157.43 kDa 
• Atom Count: 8,021 
• Modeled Residue Count: 1,077 
• Deposited Residue Count: 1,414 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Gs-mini-Gq chimera	A [auth B]	246	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	B [auth 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: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	C [auth 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: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
scFv16	D [auth E]	267	Mus musculus	Mutation(s): 0

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
Soluble cytochrome b562,Mas-related G-protein coupled receptor member X4	E [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	P0ABE7Q96LA9

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.89 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.2
RECONSTRUCTION	cryoSPARC	4.4.1

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-10-14 
Deposition Author(s): Cao, C., Wang, C., Zhang, M., Ji, Z.

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Funding Organization	Location	Grant Number
Ministry of Science and Technology (MoST, China)	China	2025YFA1309100
National Natural Science Foundation of China (NSFC)	China	82504820

Revision History  

• Version 1.0: 2026-10-14
  Type: Initial release