6MIX

Human TRPM2 ion channel in apo state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures and gating mechanism of human TRPM2.

Wang, L.Fu, T.M.Zhou, Y.Xia, S.Greka, A.Wu, H.

(2018) Science 362

  • DOI: 10.1126/science.aav4809
  • Primary Citation of Related Structures:  
    6MJ2, 6MIZ, 6MIX

  • PubMed Abstract: 
  • Transient receptor potential (TRP) melastatin 2 (TRPM2) is a cation channel associated with numerous diseases. It has a C-terminal NUDT9 homology (NUDT9H) domain responsible for binding adenosine diphosphate (ADP)-ribose (ADPR), and both ADPR and calcium (Ca 2+ ) are required for TRPM2 activation ...

    Transient receptor potential (TRP) melastatin 2 (TRPM2) is a cation channel associated with numerous diseases. It has a C-terminal NUDT9 homology (NUDT9H) domain responsible for binding adenosine diphosphate (ADP)-ribose (ADPR), and both ADPR and calcium (Ca 2+ ) are required for TRPM2 activation. Here we report cryo-electron microscopy structures of human TRPM2 alone, with ADPR, and with ADPR and Ca 2+ NUDT9H forms both intra- and intersubunit interactions with the N-terminal TRPM homology region (MHR1/2/3) in the apo state but undergoes conformational changes upon ADPR binding, resulting in rotation of MHR1/2 and disruption of the intersubunit interaction. The binding of Ca 2+ further engages transmembrane helices and the conserved TRP helix to cause conformational changes at the MHR arm and the lower gating pore to potentiate channel opening. These findings explain the molecular mechanism of concerted TRPM2 gating by ADPR and Ca 2+ and provide insights into the gating mechanism of other TRP channels.


    Organizational Affiliation

    Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transient receptor potential cation channel subfamily M member 2A, B, C, D1503Homo sapiensMutation(s): 0 
Gene Names: TRPM2EREG1KNP3LTRPC2TRPC7
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for O94759 (Homo sapiens)
Explore O94759 
Go to UniProtKB:  O94759
PHAROS:  O94759
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-12-12
    Type: Initial release
  • Version 1.1: 2019-01-02
    Changes: Data collection, Database references