6BQV

Human TRPM4 ion channel in lipid nanodiscs in a calcium-bound state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.1 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the human TRPM4 ion channel in a lipid nanodisc.

Autzen, H.E.Myasnikov, A.G.Campbell, M.G.Asarnow, D.Julius, D.Cheng, Y.

(2018) Science 359: 228-232

  • DOI: 10.1126/science.aar4510
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Transient receptor potential (TRP) melastatin 4 (TRPM4) is a widely expressed cation channel associated with a variety of cardiovascular disorders. TRPM4 is activated by increased intracellular calcium in a voltage-dependent manner but, unlike many o ...

    Transient receptor potential (TRP) melastatin 4 (TRPM4) is a widely expressed cation channel associated with a variety of cardiovascular disorders. TRPM4 is activated by increased intracellular calcium in a voltage-dependent manner but, unlike many other TRP channels, is permeable to monovalent cations only. Here we present two structures of full-length human TRPM4 embedded in lipid nanodiscs at ~3-angstrom resolution, as determined by single-particle cryo-electron microscopy. These structures, with and without calcium bound, reveal a general architecture for this major subfamily of TRP channels and a well-defined calcium-binding site within the intracellular side of the S1-S4 domain. The structures correspond to two distinct closed states. Calcium binding induces conformational changes that likely prime the channel for voltage-dependent opening.


    Organizational Affiliation

    Department of Physiology, University of California, San Francisco, CA 94143, USA.,Department of Molecular Biology and Genetics, University of Aarhus, 8000 Aarhus, Denmark.,Howard Hughes Medical Institute, University of California, San Francisco, CA 94143, USA.,Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143, 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
1218Homo 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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
Y01
Query on Y01

Download SDF File 
Download CCD File 
A, B, C, D
CHOLESTEROL HEMISUCCINATE
C31 H50 O4
WLNARFZDISHUGS-MIXBDBMTSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.1 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR01GM098672
National Institutes of Health/Office of the DirectorUnited StatesS10OD020054
National Institutes of Health/Office of the DirectorUnited StatesS10OD021741
National Institutes of Health/National Institute of Neurological Disorders and StrokeUnited StatesR01NS047723
Danish Council of Independent ResearchDenmarkDFF-5051-00085

Revision History 

  • Version 1.0: 2017-12-20
    Type: Initial release
  • Version 1.1: 2018-01-17
    Type: Author supporting evidence
  • Version 1.2: 2018-01-24
    Type: Database references
  • Version 1.3: 2018-08-22
    Type: Data collection, Database references