4A97

X-ray structure of a pentameric ligand gated ion channel from Erwinia chrysanthemi (ELIC) in complex with zopiclone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.343 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Pentameric Ligand-Gated Ion Channel Elic is Activated by Gaba and Modulated by Benzodiazepines.

Spurny, R.Ramerstorfer, J.Price, K.Brams, M.Ernst, M.Nury, H.Verheij, M.Legrand, P.Bertrand, D.Bertrand, S.Dougherty, D.A.De Esch, I.J.P.Corringer, P.Sieghart, W.Lummis, S.C.R.Ulens, C.

(2012) Proc.Natl.Acad.Sci.USA 109: E3028

  • DOI: 10.1073/pnas.1208208109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • GABA(A) receptors are pentameric ligand-gated ion channels involved in fast inhibitory neurotransmission and are allosterically modulated by the anxiolytic, anticonvulsant, and sedative-hypnotic benzodiazepines. Here we show that the prokaryotic homo ...

    GABA(A) receptors are pentameric ligand-gated ion channels involved in fast inhibitory neurotransmission and are allosterically modulated by the anxiolytic, anticonvulsant, and sedative-hypnotic benzodiazepines. Here we show that the prokaryotic homolog ELIC also is activated by GABA and is modulated by benzodiazepines with effects comparable to those at GABA(A) receptors. Crystal structures reveal important features of GABA recognition and indicate that benzodiazepines, depending on their concentration, occupy two possible sites in ELIC. An intrasubunit site is adjacent to the GABA-recognition site but faces the channel vestibule. A second intersubunit site partially overlaps with the GABA site and likely corresponds to a low-affinity benzodiazepine-binding site in GABA(A) receptors that mediates inhibitory effects of the benzodiazepine flurazepam. Our study offers a structural view how GABA and benzodiazepines are recognized at a GABA-activated ion channel.


    Organizational Affiliation

    Department of Cellular and Molecular Medicine, Laboratory of Structural Neurobiology, Catholic University of Leuven, 3000 Leuven, Belgium.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYS-LOOP LIGAND-GATED ION CHANNEL
A, B, C, D, E, F, G, H, I, J
307Dickeya chrysanthemiMutation(s): 0 
Find proteins for P0C7B7 (Dickeya chrysanthemi)
Go to UniProtKB:  P0C7B7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZPC
Query on ZPC

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
(5R)-6-(5-chloropyridin-2-yl)-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-yl 4-methylpiperazine-1-carboxylate
R-ZOPICLONE
C17 H17 Cl N6 O3
GBBSUAFBMRNDJC-MRXNPFEDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.343 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.205 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 105.400α = 90.00
b = 266.830β = 109.20
c = 110.760γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2012-11-14
    Type: Database references