6BCQ | pdb_00006bcq

cryo-EM structure of TRPM4 in ATP bound state with long coiled coil at 3.3 angstrom resolution

• PDB DOI: https://doi.org/10.2210/pdb6BCQ/pdb
• EM Map EMD-7085: EMDB EMDataResource

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


• Deposited: 2017-10-20 Released: 2017-12-13 
• Deposition Author(s): Guo, J., She, J., Chen, Q., Bai, X., Jiang, Y.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), Welch Foundation, Howard Hughes Medical Institute (HHMI)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.25 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structures of the calcium-activated, non-selective cation channel TRPM4.

Guo, J., She, J., Zeng, W., Chen, Q., Bai, X.C., Jiang, Y.

(2017) Nature 552: 205-209

• PubMed: 29211714 
• DOI: https://doi.org/10.1038/nature24997
• Primary Citation Related Structures: 
  6BCJ, 6BCL, 6BCO, 6BCQ


• PubMed Abstract: 
  

  TRPM4 is a calcium-activated, phosphatidylinositol-4,5-bisphosphate (PtdIns(4,5)P ₂ ) -modulated, non-selective cation channel that belongs to the family of melastatin-related transient receptor potential (TRPM) channels. Here we present the electron cryo-microscopy structures of the mouse TRPM4 channel with and without ATP. TRPM4 consists of multiple transmembrane and cytosolic domains, which assemble into a three-tiered architecture. The N-terminal nucleotide-binding domain and the C-terminal coiled-coil participate in the tetrameric assembly of the channel; ATP binds at the nucleotide-binding domain and inhibits channel activity. TRPM4 has an exceptionally wide filter but is only permeable to monovalent cations; filter residue Gln973 is essential in defining monovalent selectivity. The S1-S4 domain and the post-S6 TRP domain form the central gating apparatus that probably houses the Ca ²⁺ - and PtdIns(4,5)P ₂ -binding sites. These structures provide an essential starting point for elucidating the complex gating mechanisms of TRPM4 and reveal the molecular architecture of the TRPM family.

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Organizational Affiliation: 
• Department of Physiology, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9040, USA.
Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas 75390-8816, USA.
Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9040, USA.
Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9039, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 565.72 kDa 
• Atom Count: 31,048 
• Modeled Residue Count: 3,932 
• Deposited Residue Count: 5,016 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transient receptor potential cation channel subfamily M member 4	A [auth B], B [auth A], C, D	1,254	Mus musculus	Mutation(s): 0  Gene Names: Trpm4, Ltrpc4 Membrane Entity: Yes
UniProt
Find proteins for Q7TN37 (Mus musculus) Explore Q7TN37  Go to UniProtKB:  Q7TN37

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ATP	E [auth B], F [auth A], G [auth C], H [auth D]	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.25 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX
RECONSTRUCTION	RELION	2

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2017-12-13 
Deposition Author(s): Guo, J., She, J., Chen, Q., Bai, X., Jiang, Y.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM079179
Welch Foundation	United States	I-1578
Howard Hughes Medical Institute (HHMI)	United States	--

Revision History  

• Version 1.0: 2017-12-13
  Type: Initial release
  
• Version 1.1: 2017-12-20
  Changes: Database references
• Version 1.2: 2017-12-27
  Changes: Database references
• Version 1.3: 2018-07-18
  Changes: Data collection
• Version 1.4: 2019-11-20
  Changes: Author supporting evidence, Data collection
• Version 1.5: 2024-10-16
  Changes: Data collection, Database references, Structure summary
• Version 1.6: 2025-05-21
  Changes: Data collection