6PUU

Human TRPM2 bound to 8-Br-cADPR and calcium

  • Classification: TRANSPORT PROTEIN
  • Organism(s): Homo sapiens
  • Expression System: Homo sapiens

  • Deposited: 2019-07-18 Released: 2019-09-25 
  • Deposition Author(s): Du, J., Lu, W., Huang, Y.
  • Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS) 

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.7 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

Ligand recognition and gating mechanism through three ligand-binding sites of human TRPM2 channel.

Huang, Y.Roth, B.Lu, W.Du, J.

(2019) Elife 8: --

  • DOI: 10.7554/eLife.50175
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • TRPM2 is critically involved in diverse physiological processes including core temperature sensing, apoptosis, and immune response. TRPM2's activation by Ca <sup>2+ </sup> and ADP ribose (ADPR), an NAD <sup>+ </sup>-metabolite produced under oxidativ ...

    TRPM2 is critically involved in diverse physiological processes including core temperature sensing, apoptosis, and immune response. TRPM2's activation by Ca 2+ and ADP ribose (ADPR), an NAD + -metabolite produced under oxidative stress and neurodegenerative conditions, suggests a role in neurological disorders. We provide a central concept between triple-site ligand binding and the channel gating of human TRPM2. We show consecutive structural rearrangements and channel activation of TRPM2 induced by binding of ADPR in two indispensable locations, and the binding of Ca 2+ in the transmembrane domain. The 8-Br-cADPR-an antagonist of cADPR-binds only to the MHR1/2 domain and inhibits TRPM2 by stabilizing the channel in an apo-like conformation. We conclude that MHR1/2 acts as a orthostatic ligand-binding site for TRPM2. The NUDT9-H domain binds to a second ADPR to assist channel activation in vertebrates, but not necessary in invertebrates. Our work provides insights into the gating mechanism of human TRPM2 and its pharmacology.


    Organizational Affiliation

    Van Andel Institute, Grand Rapids, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transient receptor potential cation channel subfamily M member 2
A, B, C, D
1512Homo sapiensMutation(s): 0 
Gene Names: TRPM2 (EREG1, KNP3, LTRPC2, TRPC7)
Find proteins for O94759 (Homo sapiens)
Go to Gene View: TRPM2
Go to UniProtKB:  O94759
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CV1
Query on CV1

Download SDF File 
Download CCD File 
A, B, C, D
(2R,3R,4S,5R,13R,14S,15R,16R)-24-amino-18-bromo-3,4,14,15-tetrahydroxy-7,9,11,25,26-pentaoxa-17,19,22-triaza-1-azonia-8,10-diphosphapentacyclo[18.3.1.1^2,5^.1^13,16^.0^17,21^]hexacosa-1(24),18,20,22-tetraene-8,10-diolate 8,10-dioxide
8-BROMO-CYCLIC-ADP-RIBOSE
C15 H21 Br N5 O13 P2
WDGMEOAIDHHBSJ-AIKIOGRUSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2019-07-18 
  • Released Date: 2019-09-25 
  • Deposition Author(s): Du, J., Lu, W., Huang, Y.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesR01NS111031

Revision History 

  • Version 1.0: 2019-09-25
    Type: Initial release
  • Version 1.1: 2019-12-18
    Type: Author supporting evidence