2XQ4

Pentameric ligand gated ion channel GLIC in complex with tetramethylarsonium (TMAs)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.259 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of Open Channel Block in a Prokaryotic Pentameric Ligand-Gated Ion Channel

Hilf, R.J.C.Bertozzi, C.Zimmermann, I.Reiter, A.Trauner, D.Dutzler, R.

(2010) Nat.Struct.Mol.Biol. 17: 1330

  • DOI: 10.1038/nsmb.1933
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The flow of ions through cation-selective members of the pentameric ligand-gated ion channel family is inhibited by a structurally diverse class of molecules that bind to the transmembrane pore in the open state of the protein. To obtain insight into ...

    The flow of ions through cation-selective members of the pentameric ligand-gated ion channel family is inhibited by a structurally diverse class of molecules that bind to the transmembrane pore in the open state of the protein. To obtain insight into the mechanism of channel block, we have investigated the binding of positively charged inhibitors to the open channel of the bacterial homolog GLIC by using X-ray crystallography and electrophysiology. Our studies reveal the location of two regions for interactions, with larger blockers binding in the center of the membrane and divalent transition metal ions binding to the narrow intracellular pore entry. The results provide a structural foundation for understanding the interactions of the channel with inhibitors that is relevant for the entire family.


    Related Citations: 
    • Structure of a Potentially Open State of a Proton-Activated Pentameric Ligand-Gated Ion Channel.
      Hilf, R.J.C.,Dutzler, R.
      (2009) Nature 457: 115


    Organizational Affiliation

    Department of Biochemistry, University of Zürich, Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLR4197 PROTEIN
A, B, C, D, E
317Gloeobacter violaceus (strain PCC 7421)Mutation(s): 0 
Gene Names: glvI
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cys-Loop Receptor Family
Protein: 
Prokaryotic pentameric ligand-gated ion channel (GLIC)
Find proteins for Q7NDN8 (Gloeobacter violaceus (strain PCC 7421))
Go to UniProtKB:  Q7NDN8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ARS
Query on ARS

Download SDF File 
Download CCD File 
C
ARSENIC
As
RBFQJDQYXXHULB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.259 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 183.314α = 90.00
b = 128.310β = 104.04
c = 164.374γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-10
    Type: Initial release
  • Version 1.1: 2011-05-19
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance