2BR7

Crystal Structure of Acetylcholine-binding Protein (AChBP) from Aplysia californica in complex with HEPES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal Structure of Nicotinic Acetylcholine Receptor Homolog Achbp in Complex with an Alpha- Conotoxin Pnia Variant

Celie, P.H.N.Kasheverov, I.E.Mordvintsev, D.Y.Hogg, R.C.Van Nierop, P.Van Elk, R.Van Rossum-Fikkert, S.E.Zhmak, M.N.Bertrand, D.Tsetlin, V.Sixma, T.K.Smit, A.B.

(2005) Nat Struct Mol Biol 12: 582

  • DOI: 10.1038/nsmb951
  • Primary Citation of Related Structures:  
    2BR7, 2BR8

  • PubMed Abstract: 
  • Conotoxins (Ctx) form a large family of peptide toxins from cone snail venoms that act on a broad spectrum of ion channels and receptors. The subgroup alpha-Ctx specifically and selectively binds to subtypes of nicotinic acetylcholine receptors (nAChRs), which are targets for treatment of several neurological disorders ...

    Conotoxins (Ctx) form a large family of peptide toxins from cone snail venoms that act on a broad spectrum of ion channels and receptors. The subgroup alpha-Ctx specifically and selectively binds to subtypes of nicotinic acetylcholine receptors (nAChRs), which are targets for treatment of several neurological disorders. Here we present the structure at a resolution of 2.4 A of alpha-Ctx PnIA (A10L D14K), a potent blocker of the alpha(7)-nAChR, bound with high affinity to acetylcholine binding protein (AChBP), the prototype for the ligand-binding domains of the nAChR superfamily. Alpha-Ctx is buried deep within the ligand-binding site and interacts with residues on both faces of adjacent subunits. The toxin itself does not change conformation, but displaces the C loop of AChBP and induces a rigid-body subunit movement. Knowledge of these contacts could facilitate the rational design of drug leads using the Ctx framework and may lead to compounds with increased receptor subtype selectivity.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SOLUBLE ACETYLCHOLINE RECEPTORA, B, C, D, E217Aplysia californicaMutation(s): 0 
UniProt
Find proteins for Q8WSF8 (Aplysia californica)
Explore Q8WSF8 
Go to UniProtKB:  Q8WSF8
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download Ideal Coordinates CCD File 
F [auth A], G [auth B], H [auth C], I [auth D]4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.178 
  • Space Group: I 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 204.203α = 90
b = 204.203β = 90
c = 204.203γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-06-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance