4UY2

Crystal structure of the complex of the extracellular domain of human alpha9 nAChR with alpha-bungarotoxin.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.331 
  • R-Value Work: 0.258 
  • R-Value Observed: 0.262 

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Ligand Structure Quality Assessment 


This is version 1.4 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:  
    4D01, 4UXU, 4UY2

  • 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 resolutions of 1 ...

    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

    1] Department of Neurobiology, Hellenic Pasteur Institute, Athens, Greece. [2] Department of Pharmacy, University of Patras, Rio, Greece.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NEURONAL ACETYLCHOLINE RECEPTOR SUBUNIT ALPHA-9A, B218Homo sapiensMutation(s): 0 
Gene Names: CHRNA9NACHRA9
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UGM1 (Homo sapiens)
Explore Q9UGM1 
Go to UniProtKB:  Q9UGM1
PHAROS:  Q9UGM1
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-BUNGAROTOXIN ISOFORM V31C, D74Bungarus multicinctusMutation(s): 0 
UniProt
Find proteins for P60616 (Bungarus multicinctus)
Explore P60616 
Go to UniProtKB:  P60616
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG (Subject of Investigation/LOI)
Query on NAG

Download Ideal Coordinates CCD File 
E [auth A], F [auth A], G [auth B], H [auth B]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.331 
  • R-Value Work: 0.258 
  • R-Value Observed: 0.262 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.319α = 90
b = 119.348β = 103.02
c = 79.107γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-01
    Type: Initial release
  • Version 1.1: 2014-10-08
    Changes: Database references
  • Version 1.2: 2014-10-15
    Changes: Database references
  • Version 1.3: 2014-11-19
    Changes: Database references
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Other, Structure summary