1I9B

X-RAY STRUCTURE OF ACETYLCHOLINE BINDING PROTEIN (ACHBP)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.260 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of an ACh-binding protein reveals the ligand-binding domain of nicotinic receptors.

Brejc, K.van Dijk, W.J.Klaassen, R.V.Schuurmans, M.van Der Oost, J.Smit, A.B.Sixma, T.K.

(2001) Nature 411: 269-276

  • DOI: 10.1038/35077011
  • Also Cited By: 1UV6, 1UW6, 1UX2

  • PubMed Abstract: 
  • Pentameric ligand gated ion-channels, or Cys-loop receptors, mediate rapid chemical transmission of signals. This superfamily of allosteric transmembrane proteins includes the nicotinic acetylcholine (nAChR), serotonin 5-HT3, gamma-aminobutyric-acid ...

    Pentameric ligand gated ion-channels, or Cys-loop receptors, mediate rapid chemical transmission of signals. This superfamily of allosteric transmembrane proteins includes the nicotinic acetylcholine (nAChR), serotonin 5-HT3, gamma-aminobutyric-acid (GABAA and GABAC) and glycine receptors. Biochemical and electrophysiological information on the prototypic nAChRs is abundant but structural data at atomic resolution have been missing. Here we present the crystal structure of molluscan acetylcholine-binding protein (AChBP), a structural and functional homologue of the amino-terminal ligand-binding domain of an nAChR alpha-subunit. In the AChBP homopentamer, the protomers have an immunoglobulin-like topology. Ligand-binding sites are located at each of five subunit interfaces and contain residues contributed by biochemically determined 'loops' A to F. The subunit interfaces are highly variable within the ion-channel family, whereas the conserved residues stabilize the protomer fold. This AChBP structure is relevant for the development of drugs against, for example, Alzheimer's disease and nicotine addiction.


    Related Citations: 
    • A glia-derived acetylcholine-binding protein that modulates synaptic transmission
      Smit, A.B.,Syed, N.I.,Schaap, D.,van Minnen, J.,Klumperman, J.,Kits, K.S.,Lodder, H.,van der Schors, R.C.,van Elk, R.,Sorgedrager, B.,Brejc, K.,Sixma, T.K.,Geraerts, W.P.M.
      (2001) Nature 411: 261


    Organizational Affiliation

    Division of Molecular Carcinogenesis, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACETYLCHOLINE BINDING PROTEIN
A, B, C, D, E
217Lymnaea stagnalisN/A
Find proteins for P58154 (Lymnaea stagnalis)
Go to UniProtKB:  P58154
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download SDF File 
Download CCD File 
A, B, C, D, E
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
HEPES
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C, D, E
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.260 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 141.660α = 90.00
b = 141.660β = 90.00
c = 120.870γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
SOLVEphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-05-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance