1KL8

NMR STRUCTURAL ANALYSIS OF THE COMPLEX FORMED BETWEEN ALPHA-BUNGAROTOXIN AND THE PRINCIPAL ALPHA-NEUROTOXIN BINDING SEQUENCE ON THE ALPHA7 SUBUNIT OF A NEURONAL NICOTINIC ACETYLCHOLINE RECEPTOR


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR structural analysis of alpha-bungarotoxin and its complex with the principal alpha-neurotoxin-binding sequence on the alpha 7 subunit of a neuronal nicotinic acetylcholine receptor.

Moise, L.Piserchio, A.Basus, V.J.Hawrot, E.

(2002) J.Biol.Chem. 277: 12406-12417

  • DOI: 10.1074/jbc.M110320200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We report a new, higher resolution NMR structure of alpha-bungarotoxin that defines the structure-determining disulfide core and beta-sheet regions. We further report the NMR structure of the stoichiometric complex formed between alpha-bungarotoxin a ...

    We report a new, higher resolution NMR structure of alpha-bungarotoxin that defines the structure-determining disulfide core and beta-sheet regions. We further report the NMR structure of the stoichiometric complex formed between alpha-bungarotoxin and a recombinantly expressed 19-mer peptide ((178)IPGKRTESFYECCKEPYPD(196)) derived from the alpha7 subunit of the chick neuronal nicotinic acetylcholine receptor. A comparison of these two structures reveals binding-induced stabilization of the flexible tip of finger II in alpha-bungarotoxin. The conformational rearrangements in the toxin create an extensive binding surface involving both sides of the alpha7 19-mer hairpin-like structure. At the contact zone, Ala(7), Ser(9), and Ile(11) in finger I and Arg(36), Lys(38), Val(39), and Val(40) in finger II of alpha-bungarotoxin interface with Phe(186), Tyr(187), Glu(188), and Tyr(194) in the alpha7 19-mer underscoring the importance of receptor aromatic residues as critical neurotoxin-binding determinants. Superimposing the structure of the complex onto that of the acetylcholine-binding protein (1I9B), a soluble homologue of the extracellular domain of the alpha7 receptor, places alpha-bungarotoxin at the peripheral surface of the inter-subunit interface occluding the agonist-binding site. The disulfide-rich core of alpha-bungarotoxin is suggested to be tilted in the direction of the membrane surface with finger II extending into the proposed ligand-binding cavity.


    Related Citations: 
    • Chimeric Analysis of a Neuronal Nicotinic Acetylcholine Receptor Reveals Amino Acids Conferring Sensitivity to Alpha-Bungarotoxin.
      Levandoski, M.M.,Lin, Y.,Moise, L.,Mclaughlin, J.T.,Cooper, E.,Hawrot, E.
      (1999) J.Biol.Chem. 274: 26113
    • Structural Studies of Alpha-Bungarotoxin. 1. Sequence-Specific 1H NMR Resonance Assignments.
      Basus, V.J.,Billeter, M.,Love, R.A.,Stroud, R.M.,Kuntz, I.D.
      (1988) Biochemistry 27: 2763
    • Identification of Sequence Segments Forming the Alpha-Bungarotoxin Binding Sites on Two Nicotinic Acetylcholine Receptor Alpha Subunits from the Avian Brain.
      Mclane, K.E.,Wu, X.D.,Schoepfer, R.,Lindstrom, J.M.,Conti-Tronconi, B.M.
      (1991) J.Biol.Chem. 266: 15230


    Organizational Affiliation

    Department of Molecular Pharmacology, Brown University, Providence, Rhode Island 02912, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA-BUNGAROTOXIN
A
74Bungarus multicinctusMutation(s): 0 
Find proteins for P60615 (Bungarus multicinctus)
Go to UniProtKB:  P60615
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NEURONAL ACETYLCHOLINE RECEPTOR PROTEIN, ALPHA-7 CHAIN
B
20Gallus gallusMutation(s): 1 
Gene Names: CHRNA7
Find proteins for P22770 (Gallus gallus)
Go to Gene View: CHRNA7
Go to UniProtKB:  P22770
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HSL
Query on HSL
B
L-PEPTIDE LINKINGC4 H7 N O2SER
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-03-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance