Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction | Predict Membrane 

Global Symmetry: Cyclic - C4  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 519.60 kDa 
• Atom Count: 30469 
• Modelled Residue Count: 3720 
• Deposited Residue Count: 4480 
• Unique protein chains: 1

7WRF

Mouse TRPM8 in lipid nanodiscs in the presence of calcium, icilin and PI(4,5)P2

• PDB DOI: 10.2210/pdb7WRF/pdb
• EM Map EMD-32725: EMDB EMDataResource

• Classification: TRANSPORT PROTEIN
• Organism(s): Mus musculus
• Expression System: Homo sapiens
• Mutation(s): No 
• Membrane Protein: Yes  PDBTM


• Deposited: 2022-01-26 Released: 2022-06-22 
• Deposition Author(s): Zhao, C., Xie, Y., Guo, J.
• Funding Organization(s): Ministry of Science and Technology (MoST, China)

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.04 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structures of a mammalian TRPM8 in closed state.

Zhao, C., Xie, Y., Xu, L., Ye, F., Xu, X., Yang, W., Yang, F., Guo, J.

(2022) Nat Commun 13: 3113-3113

• PubMed: 35662242 
• DOI: 10.1038/s41467-022-30919-y
• Primary Citation of Related Structures:  
  7WRA, 7WRB, 7WRC, 7WRD, 7WRE, 7WRF


• PubMed Abstract: 
  

Transient receptor potential melastatin 8 (TRPM8) channel is a Ca ²⁺ -permeable non-selective cation channel that acts as the primary cold sensor in humans. TRPM8 is also activated by ligands such as menthol, icilin, and phosphatidylinositol 4,5-bisphosphate (PIP ₂ ), and desensitized by Ca ²⁺ . Here we have determined electron cryo-microscopy structures of mouse TRPM8 in the absence of ligand, and in the presence of Ca ²⁺ and icilin at 2.5-3.2 Å resolution. The ligand-free state TRPM8 structure represents the full-length structure of mammalian TRPM8 channels with a canonical S4-S5 linker and the clearly resolved selectivity filter and outer pore loop. TRPM8 has a short but wide selectivity filter which may account for its permeability to hydrated Ca ²⁺ . Ca ²⁺ and icilin bind in the cytosolic-facing cavity of the voltage-sensing-like domain of TRPM8 but induce little conformational change. All the ligand-bound TRPM8 structures adopt the same closed conformation as the ligand-free structure. This study reveals the overall architecture of mouse TRPM8 and the structural basis for its ligand recognition.

---

Organizational Affiliation: 

Cancer Center, Zhejiang University, Hangzhou, Zhejiang, 310058, China. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transient receptor potential cation channel subfamily M member 8	A, B, C, D	1120	Mus musculus	Mutation(s): 0  Gene Names: Trpm8, Ltrpc6, Trpp8 Membrane Entity: Yes
UniProt
Find proteins for Q8R4D5 (Mus musculus) Explore Q8R4D5  Go to UniProtKB:  Q8R4D5

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
KX7 (Subject of Investigation/LOI)	G [auth A], I [auth B], K [auth C], M [auth D]	Icilin C16 H13 N3 O4 RCEFMOGVOYEGJN-UHFFFAOYSA-N
CA (Subject of Investigation/LOI)	E [auth A], H [auth B], J [auth C], L [auth D]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
NA (Subject of Investigation/LOI)	F [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.04 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2022-01-26 
• Released Date: 2022-06-22 
Deposition Author(s): Zhao, C., Xie, Y., Guo, J.

---

Funding Organization	Location	Grant Number
Ministry of Science and Technology (MoST, China)	China	2020YFA0908501
Ministry of Science and Technology (MoST, China)	China	2018YFA0508100

Revision History  

• Version 1.0: 2022-06-22
  Type: Initial release