4UXU

Crystal Structure of the Extracellular Domain of the Human Alpha9 Nicotinic Acetylcholine Receptor In Complex with Methyllycaconitine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.71 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal Structures of Free and Antagonist-Bound States of Human Alpha9 Nicotinic Receptor Extracellular Domain

Zouridakis, M.Giastas, P.Zarkadas, E.Chroni-Tzartou, D.Bregestovski, P.Tzartos, S.J.

(2014) Nat.Struct.Mol.Biol. 21: 976

  • DOI: 10.1038/nsmb.2900
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We determined the X-ray crystal structures of the extracellular domain (ECD) of the monomeric state of human neuronal α9 nicotinic acetylcholine receptor (nAChR) and of its complexes with the antagonists methyllycaconitine and α-bungarotoxin at resol ...

    We determined the X-ray crystal structures of the extracellular domain (ECD) of the monomeric state of human neuronal α9 nicotinic acetylcholine receptor (nAChR) and of its complexes with the antagonists methyllycaconitine and α-bungarotoxin at resolutions of 1.8 Å, 1.7 Å and 2.7 Å, respectively. The structure of the monomeric α9 ECD superimposed well with the structures of homologous proteins in pentameric assemblies, denoting native folding, despite the absence of a complementary subunit and transmembrane domain. The interaction motifs of both antagonists were similar to those in the complexes with homologous pentameric proteins, thus highlighting the major contribution of the principal side of α9 ECD to their binding. The structures revealed a functionally important β7-β10 strand interaction in α9-containing nAChRs, involving their unique Thr147, a hydration pocket similar to that of mouse α1 ECD and a membrane-facing network coordinated by the invariant Arg210.


    Organizational Affiliation

    Department of Neurobiology, Hellenic Pasteur Institute, Athens, Greece.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NEURONAL ACETYLCHOLINE RECEPTOR SUBUNIT ALPHA-9
A, B
218Homo sapiensMutation(s): 0 
Gene Names: CHRNA9 (NACHRA9)
Find proteins for Q9UGM1 (Homo sapiens)
Go to Gene View: CHRNA9
Go to UniProtKB:  Q9UGM1
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

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Download CCD File 
A, B
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
HEPES
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

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Download CCD File 
A, B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
MLK
Query on MLK

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Download CCD File 
A, B
METHYLLYCACONITINE
C37 H50 N2 O10
XLTANAWLDBYGFU-VTLKBQQISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.71 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.206 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 63.434α = 90.00
b = 66.246β = 102.76
c = 75.191γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-01
    Type: Initial release
  • Version 1.1: 2014-10-08
    Type: Database references
  • Version 1.2: 2014-10-15
    Type: Database references
  • Version 1.3: 2014-11-19
    Type: Database references