5FJV

Crystal structure of the extracellular domain of alpha2 nicotinic acetylcholine receptor in pentameric assembly


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of a Human Neuronal Nachr Extracellular Domain in Pentameric Assembly: Ligand-Bound Alpah2 Homopentamer.

Kouvatsos, N.Giastas, P.Chroni-Tzartou, D.Poulopoulou, C.Tzartos, S.J.

(2016) Proc.Natl.Acad.Sci.USA 113: 9635

  • DOI: 10.1073/pnas.1602619113

  • PubMed Abstract: 
  • In this study we report the X-ray crystal structure of the extracellular domain (ECD) of the human neuronal α2 nicotinic acetylcholine receptor (nAChR) subunit in complex with the agonist epibatidine at 3.2 Å. Interestingly, α2 was crystallized as a ...

    In this study we report the X-ray crystal structure of the extracellular domain (ECD) of the human neuronal α2 nicotinic acetylcholine receptor (nAChR) subunit in complex with the agonist epibatidine at 3.2 Å. Interestingly, α2 was crystallized as a pentamer, revealing the intersubunit interactions in a wild type neuronal nAChR ECD and the full ligand binding pocket conferred by two adjacent α subunits. The pentameric assembly presents the conserved structural scaffold observed in homologous proteins, as well as distinctive features, providing unique structural information of the binding site between principal and complementary faces. Structure-guided mutagenesis and electrophysiological data confirmed the presence of the α2(+)/α2(-) binding site on the heteromeric low sensitivity α2β2 nAChR and validated the functional importance of specific residues in α2 and β2 nAChR subunits. Given the pathological importance of the α2 nAChR subunit and the high sequence identity with α4 (78%) and other neuronal nAChR subunits, our findings offer valuable information for modeling several nAChRs and ultimately for structure-based design of subtype specific drugs against the nAChR associated diseases.


    Organizational Affiliation

    Department of Neurobiology, Hellenic Pasteur Institute, 11521 Athens, Greece; nkouvatsos@pasteur.gr tzartos@pasteur.gr.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NEURONAL ACETYLCHOLINE RECEPTOR SUBUNIT ALPHA-2
A, B, C, D, E
213Homo sapiensMutation(s): 0 
Gene Names: CHRNA2
Find proteins for Q15822 (Homo sapiens)
Go to Gene View: CHRNA2
Go to UniProtKB:  Q15822
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPJ
Query on EPJ

Download SDF File 
Download CCD File 
A, B, C, D, E
EPIBATIDINE
(2R)-2-(6-CHLOROPYRIDIN-3-YL)-7-AZABICYCLO[2.2.1]HEPTANE
C11 H13 Cl N2
NLPRAJRHRHZCQQ-IVZWLZJFSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
EPJKi: 10.2 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.224 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 101.524α = 90.00
b = 116.559β = 90.00
c = 129.546γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
PHENIXrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-10
    Type: Initial release
  • Version 1.1: 2016-08-17
    Type: Database references
  • Version 1.2: 2016-09-28
    Type: Database references