5SXU

X-ray structure of 2-bromoethanol bound to a pentameric ligand gated ion channel (ELIC) in a desensitized state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of Alcohol Inhibition of the Pentameric Ligand-Gated Ion Channel ELIC.

Chen, Q.Wells, M.M.Tillman, T.S.Kinde, M.N.Cohen, A.Xu, Y.Tang, P.

(2017) Structure 25: 180-187

  • DOI: 10.1016/j.str.2016.11.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The structural basis for alcohol modulation of neuronal pentameric ligand-gated ion channels (pLGICs) remains elusive. We determined an inhibitory mechanism of alcohol on the pLGIC Erwinia chrysanthemi (ELIC) through direct binding to the pore. X-ray ...

    The structural basis for alcohol modulation of neuronal pentameric ligand-gated ion channels (pLGICs) remains elusive. We determined an inhibitory mechanism of alcohol on the pLGIC Erwinia chrysanthemi (ELIC) through direct binding to the pore. X-ray structures of ELIC co-crystallized with 2-bromoethanol, in both the absence and presence of agonist, reveal 2-bromoethanol binding in the pore near T237(6') and the extracellular domain (ECD) of each subunit at three different locations. Binding to the ECD does not appear to contribute to the inhibitory action of 2-bromoethanol and ethanol as indicated by the same functional responses of wild-type ELIC and mutants. In contrast, the ELIC-α1β3GABAAR chimera, replacing the ELIC transmembrane domain (TMD) with the TMD of α1β3GABAAR, is potentiated by 2-bromoethanol and ethanol. The results suggest a dominant role of the TMD in modulating alcohol effects. The X-ray structures and functional measurements support a pore-blocking mechanism for inhibitory action of short-chain alcohols.


    Organizational Affiliation

    Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15260, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Gamma-aminobutyric-acid receptor subunit beta-1
A, B, C, D, E, F, G, H, I, J
322Dickeya dadantii (strain 3937)Mutation(s): 0 
Find proteins for E0SJQ4 (Dickeya dadantii (strain 3937))
Go to UniProtKB:  E0SJQ4
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
C, J
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
3CN
Query on 3CN

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
3-AMINOPROPANE
C3 H9 N
WGYKZJWCGVVSQN-UHFFFAOYSA-N
 Ligand Interaction
BRJ
Query on BRJ

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
2-BROMOETHANOL
C2 H5 Br O
LDLCZOVUSADOIV-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 105.903α = 90.00
b = 266.791β = 107.13
c = 111.109γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PHENIXrefinement
XDSdata scaling
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR01GM066358
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR01GM056257
National Institutes of Health/National Institute of General Medical SciencesUnited StatesT32GM075770
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR37GM049202

Revision History 

  • Version 1.0: 2017-06-21
    Type: Initial release
  • Version 1.1: 2017-09-13
    Type: Author supporting evidence
  • Version 1.2: 2017-11-22
    Type: Refinement description