5XW6

Crystal structure of the chicken ATP-gated P2X7 receptor channel in the presence of competitive antagonist TNP-ATP at 3.1 Angstroms

  • Classification: MEMBRANE PROTEIN
  • Organism(s): Gallus gallus
  • Expression System: Homo sapiens
  • Mutation(s): 

  • Deposited: 2017-06-29 Released: 2017-10-25 
  • Deposition Author(s): Kasuya, G., Hattori, M., Nureki, O.
  • Funding Organization(s): Japan Society for the Promotion of Science; the Ministry of Science and Technology of China; the National Natural Science Foundation of China 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural insights into the competitive inhibition of the ATP-gated P2X receptor channel

Kasuya, G.Yamaura, T.Ma, X.B.Nakamura, R.Takemoto, M.Nagumo, H.Tanaka, E.Dohmae, N.Nakane, T.Yu, Y.Ishitani, R.Matsuzaki, O.Hattori, M.Nureki, O.

(2017) Nat Commun 8: 876-876

  • DOI: 10.1038/s41467-017-00887-9

  • PubMed Abstract: 
  • P2X receptors are non-selective cation channels gated by extracellular ATP, and the P2X7 receptor subtype plays a crucial role in the immune and nervous systems. Altered expression and dysfunctions of P2X7 receptors caused by genetic deletions, mutat ...

    P2X receptors are non-selective cation channels gated by extracellular ATP, and the P2X7 receptor subtype plays a crucial role in the immune and nervous systems. Altered expression and dysfunctions of P2X7 receptors caused by genetic deletions, mutations, and polymorphic variations have been linked to various diseases, such as rheumatoid arthritis and hypertension. Despite the availability of crystal structures of P2X receptors, the mechanism of competitive antagonist action for P2X receptors remains controversial. Here, we determine the crystal structure of the chicken P2X7 receptor in complex with the competitive P2X antagonist, TNP-ATP. The structure reveals an expanded, incompletely activated conformation of the channel, and identified the unique recognition manner of TNP-ATP, which is distinct from that observed in the previously determined human P2X3 receptor structure. A structure-based computational analysis furnishes mechanistic insights into the TNP-ATP-dependent inhibition. Our work provides structural insights into the functional mechanism of the P2X competitive antagonist.P2X receptors are nonselective cation channels that are gated by extracellular ATP. Here the authors present the crystal structure of chicken P2X7 with its bound competitive antagonist TNP-ATP and give mechanistic insights into TNP-ATP dependent inhibition through further computational analysis and electrophysiology measurements.


    Organizational Affiliation

    Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
P2X purinoceptor
C, A, B
327Gallus gallusMutation(s): 1 
Gene Names: P2RX7
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Other Ion Channels
Protein: 
ATP-gated P2X7 ion channel
Find proteins for E1C6P3 (Gallus gallus)
Go to Gene View: P2RX7
Go to UniProtKB:  E1C6P3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
128
Query on 128

Download SDF File 
Download CCD File 
A, B, C
SPIRO(2,4,6-TRINITROBENZENE[1,2A]-2O',3O'-METHYLENE-ADENINE-TRIPHOSPHATE
C16 H17 N8 O19 P3
XFMMHXLUHKBKQE-UHEGPQQHSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.220 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 113.038α = 90.00
b = 113.038β = 90.00
c = 333.472γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
MOLREPphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Society for the Promotion of ScienceJapan16H06294
Japan Society for the Promotion of ScienceJapan24227004
the Ministry of Science and Technology of ChinaChina2016YFA0502800
the National Natural Science Foundation of ChinaChina31570838
the National Natural Science Foundation of ChinaChina31650110469

Revision History 

  • Version 1.0: 2017-10-25
    Type: Initial release