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:  
    1KC4, 1KFH, 1KL8

  • 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
    • 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
    • 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

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-BUNGAROTOXINA74Bungarus multicinctusMutation(s): 0 
Find proteins for P60615 (Bungarus multicinctus)
Explore P60615 
Go to UniProtKB:  P60615
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
NEURONAL ACETYLCHOLINE RECEPTOR PROTEIN, ALPHA-7 CHAINB20Gallus gallusMutation(s): 1 
Gene Names: CHRNA7
Find proteins for P22770 (Gallus gallus)
Explore P22770 
Go to UniProtKB:  P22770
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HSL
Query on HSL
BL-PEPTIDE LINKINGC4 H7 N O2SER
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • OLDERADO: 1KL8 Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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