5KXI

X-ray structure of the human Alpha4Beta2 nicotinic receptor

  • Classification: TRANSPORT PROTEIN
  • Organism(s): Homo sapiens
  • Expression System: Homo sapiens

  • Deposited: 2016-07-20 Released: 2016-09-28 
  • Deposition Author(s): Morales-Perez, C.L., Noviello, C.M., Hibbs, R.E.
  • Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke; Howard Hughes Medical Institute; National Institutes of Health/National Institute on Drug Abuse; Welch Foundation; McKnight Scholar Award; Klingenstein-Simons Fellowship Award 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.941 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.285 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

X-ray structure of the human alpha 4 beta 2 nicotinic receptor.

Morales-Perez, C.L.Noviello, C.M.Hibbs, R.E.

(2016) Nature 538: 411-415

  • DOI: 10.1038/nature19785

  • PubMed Abstract: 
  • Nicotinic acetylcholine receptors are ligand-gated ion channels that mediate fast chemical neurotransmission at the neuromuscular junction and have diverse signalling roles in the central nervous system. The nicotinic receptor has been a model system ...

    Nicotinic acetylcholine receptors are ligand-gated ion channels that mediate fast chemical neurotransmission at the neuromuscular junction and have diverse signalling roles in the central nervous system. The nicotinic receptor has been a model system for cell-surface receptors, and specifically for ligand-gated ion channels, for well over a century. In addition to the receptors' prominent roles in the development of the fields of pharmacology and neurobiology, nicotinic receptors are important therapeutic targets for neuromuscular disease, addiction, epilepsy and for neuromuscular blocking agents used during surgery. The overall architecture of the receptor was described in landmark studies of the nicotinic receptor isolated from the electric organ of Torpedo marmorata. Structures of a soluble ligand-binding domain have provided atomic-scale insights into receptor-ligand interactions, while high-resolution structures of other members of the pentameric receptor superfamily provide touchstones for an emerging allosteric gating mechanism. All available high-resolution structures are of homopentameric receptors. However, the vast majority of pentameric receptors (called Cys-loop receptors in eukaryotes) present physiologically are heteromeric. Here we present the X-ray crystallographic structure of the human α4β2 nicotinic receptor, the most abundant nicotinic subtype in the brain. This structure provides insights into the architectural principles governing ligand recognition, heteromer assembly, ion permeation and desensitization in this prototypical receptor class.


    Organizational Affiliation

    Departments of Neuroscience and Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neuronal acetylcholine receptor subunit alpha-4
A, D
386Homo sapiensMutation(s): 0 
Gene Names: CHRNA4 (NACRA4)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cys-Loop Receptor Family
Protein: 
Nicotinic Acetylcholine α4β2 Receptor
Find proteins for P43681 (Homo sapiens)
Go to Gene View: CHRNA4
Go to UniProtKB:  P43681
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Neuronal acetylcholine receptor subunit beta-2
B, C, E
403Homo sapiensMutation(s): 0 
Gene Names: CHRNB2
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cys-Loop Receptor Family
Protein: 
Nicotinic Acetylcholine α4β2 Receptor
Find proteins for P17787 (Homo sapiens)
Go to Gene View: CHRNB2
Go to UniProtKB:  P17787
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NCT
Query on NCT

Download SDF File 
Download CCD File 
A, D
(S)-3-(1-METHYLPYRROLIDIN-2-YL)PYRIDINE
(S)-(-)-NICOTINE, 3-[(2S)-1-METHYL-2-PYRROLIDINYL] PYRIDINE
C10 H14 N2
SNICXCGAKADSCV-JTQLQIEISA-N
 Ligand Interaction
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C, D, E
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
NCTIC50: 1.6 nM (94) BINDINGDB
NCTKi: 0.8 - 6690 nM (94) BINDINGDB
NCTEC50: 590 - 6600 nM (94) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.941 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.285 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 127.099α = 90.00
b = 132.633β = 90.00
c = 202.440γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
PHENIXphasing
HKL-2000data 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 Neurological Disorders and StrokeUnited StatesT32 NS069562
Howard Hughes Medical InstituteUnited StatesGilliam Fellowship
National Institutes of Health/National Institute on Drug AbuseUnited StatesDA037492
National Institutes of Health/National Institute of Neurological Disorders and StrokeUnited StatesNS077983
National Institutes of Health/National Institute of Neurological Disorders and StrokeUnited StatesNS095899
Welch FoundationUnited StatesI-1812
McKnight Scholar AwardUnited States--
Klingenstein-Simons Fellowship AwardUnited States--
National Institutes of Health/National Institute on Drug AbuseUnited StatesDA042072

Revision History 

  • Version 1.0: 2016-09-28
    Type: Initial release
  • Version 1.1: 2016-10-19
    Type: Database references
  • Version 1.2: 2016-11-02
    Type: Database references
  • Version 1.3: 2017-09-27
    Type: Author supporting evidence, Database references, Derived calculations