5NKJ

X-ray structure of the N239C mutant of GLIC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.74 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for a Bimodal Allosteric Mechanism of General Anesthetic Modulation in Pentameric Ligand-Gated Ion Channels.

Fourati, Z.Howard, R.J.Heusser, S.A.Hu, H.Ruza, R.R.Sauguet, L.Lindahl, E.Delarue, M.

(2018) Cell Rep 23: 993-1004

  • DOI: 10.1016/j.celrep.2018.03.108
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ion channel modulation by general anesthetics is a vital pharmacological process with implications for receptor biophysics and drug development. Functional studies have implicated conserved sites of both potentiation and inhibition in pentameric liga ...

    Ion channel modulation by general anesthetics is a vital pharmacological process with implications for receptor biophysics and drug development. Functional studies have implicated conserved sites of both potentiation and inhibition in pentameric ligand-gated ion channels, but a detailed structural mechanism for these bimodal effects is lacking. The prokaryotic model protein GLIC recapitulates anesthetic modulation of human ion channels, and it is accessible to structure determination in both apparent open and closed states. Here, we report ten X-ray structures and electrophysiological characterization of GLIC variants in the presence and absence of general anesthetics, including the surgical agent propofol. We show that general anesthetics can allosterically favor closed channels by binding in the pore or favor open channels via various subsites in the transmembrane domain. Our results support an integrated, multi-site mechanism for allosteric modulation, and they provide atomic details of both potentiation and inhibition by one of the most common general anesthetics.


    Organizational Affiliation

    Unit of Structural Dynamics of Macromolecules, Institut Pasteur and UMR 3528 du CNRS, 75015 Paris, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proton-gated ion channel
A, B, C, D, E
317Gloeobacter violaceus (strain ATCC 29082 / PCC 7421)Mutation(s): 1 
Gene Names: glvI
Find proteins for Q7NDN8 (Gloeobacter violaceus (strain ATCC 29082 / PCC 7421))
Go to UniProtKB:  Q7NDN8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.74 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.234 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 176.140α = 90.00
b = 134.690β = 99.99
c = 158.620γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
SCALAdata scaling
XDSdata reduction
BUSTERphasing
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-06-20
    Type: Initial release
  • Version 1.1: 2019-05-08
    Type: Advisory, Data collection, Derived calculations