5MUR

X-ray structure of the F14'A mutant of GLIC in complex with propofol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 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
  • Structures With Same Primary Citation

  • 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. Electronic address: delarue@pasteur.fr.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proton-gated ion channel
A, B, C, D, E
317Gloeobacter violaceus PCC 7421Mutation(s): 1 
Gene Names: glvIglr4197
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cys-Loop Receptor Family
Protein: 
Prokaryotic pentameric ligand-gated ion channel (GLIC), H235Q apo mutant
Find proteins for Q7NDN8 (Gloeobacter violaceus (strain ATCC 29082 / PCC 7421))
Go to UniProtKB:  Q7NDN8
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PLC
Query on PLC

Download CCD File 
A, B, C, D, E
DIUNDECYL PHOSPHATIDYL CHOLINE
C32 H65 N O8 P
IJFVSSZAOYLHEE-SSEXGKCCSA-O
 Ligand Interaction
PFL
Query on PFL

Download CCD File 
B, E
2,6-BIS(1-METHYLETHYL)PHENOL
C12 H18 O
OLBCVFGFOZPWHH-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download CCD File 
A, B, C, D, E
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CL
Query on CL

Download CCD File 
A, B, C, D, E
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
NA
Query on NA

Download CCD File 
A, B, C, D, E
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.194 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 180.281α = 90
b = 132.972β = 102.1
c = 158.976γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
REFMACphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-02-14
    Type: Initial release
  • Version 1.1: 2018-06-20
    Changes: Data collection, Database references
  • Version 1.2: 2019-10-16
    Changes: Data collection