5OSC

GLIC-GABAAR alpha1 chimera crystallized in complex with pregnenolone sulfate at pH 4.5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of a GABAA-receptor chimera reveal new endogenous neurosteroid-binding sites.

Laverty, D.Thomas, P.Field, M.Andersen, O.J.Gold, M.G.Biggin, P.C.Gielen, M.Smart, T.G.

(2017) Nat. Struct. Mol. Biol. 24: 977-985

  • DOI: 10.1038/nsmb.3477
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • γ-Aminobutyric acid receptors (GABAARs) are vital for controlling excitability in the brain. This is emphasized by the numerous neuropsychiatric disorders that result from receptor dysfunction. A critical component of most native GABAARs is the α sub ...

    γ-Aminobutyric acid receptors (GABAARs) are vital for controlling excitability in the brain. This is emphasized by the numerous neuropsychiatric disorders that result from receptor dysfunction. A critical component of most native GABAARs is the α subunit. Its transmembrane domain is the target for many modulators, including endogenous brain neurosteroids that impact anxiety, stress and depression, and for therapeutic drugs, such as general anesthetics. Understanding the basis for the modulation of GABAAR function requires high-resolution structures. Here we present the first atomic structures of a GABAAR chimera at 2.8-Å resolution, including those bound with potentiating and inhibitory neurosteroids. These structures define new allosteric binding sites for these modulators that are associated with the α-subunit transmembrane domain. Our findings will enable the exploitation of neurosteroids for therapeutic drug design to regulate GABAARs in neurological disorders.


    Organizational Affiliation

    Department of Neuroscience, Physiology & Pharmacology, University College London, London, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proton-gated ion channel,Gamma-aminobutyric acid receptor subunit alpha-2,Gamma-aminobutyric acid receptor subunit alpha-1
A, B, C, D, E
336Mus musculusGloeobacter violaceus (strain ATCC 29082 / PCC 7421)
This entity is chimeric
Mutation(s): 0 
Gene Names: Gabra1 (Gabra-1), glvI
Find proteins for P62812 (Mus musculus)
Go to UniProtKB:  P62812
Find proteins for Q7NDN8 (Gloeobacter violaceus (strain ATCC 29082 / PCC 7421))
Go to UniProtKB:  Q7NDN8
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
Y01
Query on Y01

Download SDF File 
Download CCD File 
A, B, D, E
CHOLESTEROL HEMISUCCINATE
C31 H50 O4
WLNARFZDISHUGS-MIXBDBMTSA-N
 Ligand Interaction
ACT
Query on ACT

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

Download SDF File 
Download CCD File 
A, B, C, D, E
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
A8W
Query on A8W

Download SDF File 
Download CCD File 
A, B, C, D, E
Pregnenolone sulfate
pregn-5-en-3beta-ol-20-one-3beta-sulfate
C21 H32 O5 S
DIJBBUIOWGGQOP-QGVNFLHTSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.211 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 183.310α = 90.00
b = 133.180β = 102.71
c = 161.860γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
xia2data reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMR/K005537/1
Royal SocietyUnited Kingdom104194/Z/14/Z
Engineering and Physical Sciences Research CouncilUnited KingdomEP/J003921/1
Engineering and Physical Sciences Research CouncilUnited KingdomEP/L000253/1

Revision History 

  • Version 1.0: 2017-10-11
    Type: Initial release
  • Version 1.1: 2017-11-15
    Type: Database references
  • Version 1.2: 2018-01-31
    Type: Author supporting evidence