4Z91

ELIC cocrystallized with isofluorane in a desensitized state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3915 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Direct Pore Binding as a Mechanism for Isoflurane Inhibition of the Pentameric Ligand-gated Ion Channel ELIC.

Chen, Q.Kinde, M.N.Arjunan, P.Wells, M.M.Cohen, A.E.Xu, Y.Tang, P.

(2015) Sci Rep 5: 13833-13833

  • DOI: 10.1038/srep13833
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Pentameric ligand-gated ion channels (pLGICs) are targets of general anesthetics, but molecular mechanisms underlying anesthetic action remain debatable. We found that ELIC, a pLGIC from Erwinia chrysanthemi, can be functionally inhibited by isoflura ...

    Pentameric ligand-gated ion channels (pLGICs) are targets of general anesthetics, but molecular mechanisms underlying anesthetic action remain debatable. We found that ELIC, a pLGIC from Erwinia chrysanthemi, can be functionally inhibited by isoflurane and other anesthetics. Structures of ELIC co-crystallized with isoflurane in the absence or presence of an agonist revealed double isoflurane occupancies inside the pore near T237(6') and A244(13'). A pore-radius contraction near the extracellular entrance was observed upon isoflurane binding. Electrophysiology measurements with a single-point mutation at position 6' or 13' support the notion that binding at these sites renders isoflurane inhibition. Molecular dynamics simulations suggested that isoflurane binding was more stable in the resting than in a desensitized pore conformation. This study presents compelling evidence for a direct pore-binding mechanism of isoflurane inhibition, which has a general implication for inhibitory action of general anesthetics on pLGICs.


    Organizational Affiliation

    Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, 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 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
4LJ
Query on 4LJ

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
1.7.6 3-bromanylpropan-1-amine
C3 H8 Br N
ZTGQZSKPSJUEBU-UHFFFAOYSA-N
 Ligand Interaction
4LE
Query on 4LE

Download SDF File 
Download CCD File 
A, E, F, J
(2R)-2-chloro-2-(difluoromethoxy)-1,1,1-trifluoroethane
C3 H2 Cl F5 O
PIWKPBJCKXDKJR-SFOWXEAESA-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: 3.3915 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 105.761α = 90.00
b = 267.595β = 107.80
c = 111.368γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXrefinement
Aimlessdata scaling
PHASERphasing

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

Revision History 

  • Version 1.0: 2015-09-16
    Type: Initial release
  • Version 1.1: 2017-09-06
    Type: Author supporting evidence, Derived calculations