5WP6

Cryo-EM structure of a human TRPM4 channel in complex with calcium and decavanadate


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Electron cryo-microscopy structure of a human TRPM4 channel.

Winkler, P.A.Huang, Y.Sun, W.Du, J.Lu, W.

(2017) Nature 552: 200-204

  • DOI: 10.1038/nature24674

  • PubMed Abstract: 
  • Ca <sup>2+ </sup>-activated, non-selective (CAN) ion channels sense increases of the intracellular Ca <sup>2+ </sup> concentration, producing a flux of Na <sup>+ </sup> and/or K <sup>+ </sup> ions that depolarizes the cell, thus modulating cellular C ...

    Ca 2+ -activated, non-selective (CAN) ion channels sense increases of the intracellular Ca 2+ concentration, producing a flux of Na + and/or K + ions that depolarizes the cell, thus modulating cellular Ca 2+ entry. CAN channels are involved in cellular responses such as neuronal bursting activity and cardiac rhythm. Here we report the electron cryo-microscopy structure of the most widespread CAN channel, human TRPM4, bound to the agonist Ca 2+ and the modulator decavanadate. Four cytosolic C-terminal domains form an umbrella-like structure with a coiled-coil domain for the 'pole' and four helical 'ribs' spanning the N-terminal TRPM homology regions (MHRs), thus holding four subunits in a crown-like architecture. We observed two decavanadate-binding sites, one in the C-terminal domain and another in the intersubunit MHR interface. A glutamine in the selectivity filter may be an important determinant of monovalent selectivity. Our structure provides new insights into the function and pharmacology of both the CAN and the TRPM families.


    Organizational Affiliation

    Van Andel Institute, 333 Bostwick Avenue N.E., Grand Rapids, Michigan 49503, USA.,Janelia Research Campus, 19700 Helix Drive, Ashburn, Virginia 20147, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transient receptor potential cation channel subfamily M member 4
A, B, C, D
1214Homo sapiensMutation(s): 0 
Gene Names: TRPM4 (LTRPC4)
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Transient Receptor Potential (TRP)
Protein: 
TRPM4 Ca2+-activated transient receptor potential channel
Find proteins for Q8TD43 (Homo sapiens)
Go to Gene View: TRPM4
Go to UniProtKB:  Q8TD43
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DVT
Query on DVT

Download SDF File 
Download CCD File 
A, B, C, D
DECAVANADATE
O28 V10
WOYKCMUEHQAMTC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-12-13
    Type: Initial release
  • Version 1.1: 2017-12-20
    Type: Database references
  • Version 1.2: 2017-12-27
    Type: Database references