1DG2

SOLUTION CONFORMATION OF A-CONOTOXIN AUIB


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: BACK CALCULATED DATA AGREE WITH EXPERIMENTAL NOESY SPECTRUM,STRUCTURES WITH ACCEPTABLE COVALENT GEOMETRY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Nuclear magnetic resonance solution conformation of alpha-conotoxin AuIB, an alpha(3)beta(4) subtype-selective neuronal nicotinic acetylcholine receptor antagonist.

Cho, J.H.Mok, K.H.Olivera, B.M.McIntosh, J.M.Park, K.H.Han, K.H.

(2000) J.Biol.Chem. 275: 8680-8685


  • PubMed Abstract: 
  • The neuronal nicotinic acetylcholine receptors constitute a highly diverse group, with subtypes consisting of pentameric combinations of alpha and beta subunits. alpha-Conotoxins are a homologous series of small peptides that antagonize these recepto ...

    The neuronal nicotinic acetylcholine receptors constitute a highly diverse group, with subtypes consisting of pentameric combinations of alpha and beta subunits. alpha-Conotoxins are a homologous series of small peptides that antagonize these receptors. We present the three-dimensional solution structure of alpha-conotoxin AuIB, the first 15-residue alpha-conotoxin known to selectively block the alpha(3)beta(4) nicotinic acetylcholine receptor subtype. The pairwise backbone and heavy-atom root mean square deviation for an ensemble of 20 structures are 0.269 and 0.720 A, respectively. The overall fold of alpha-conotoxin AuIB closely resembles that of the alpha4/7 subfamily alpha-conotoxins. However, the absence of Tyr(15), normally present in other alpha4/7 members, results in tight bending of the backbone at the C terminus and effectively renders Asp(14) to assume the spatial location of Tyr(15) present in other neuronal alpha4/7 alpha-conotoxins. Structural comparison of alpha-conotoxin AuIB with the alpha(3)beta(2) subtype-specific alpha-conotoxin MII shows different electrostatic surface charge distributions, which may be important in differential receptor subtype recognition.


    Organizational Affiliation

    Protein Engineering Laboratory, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon 305-600, Republic of Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
A-CONOTOXIN AUIB
A
16Conus aulicusN/A
Find proteins for P56640 (Conus aulicus)
Go to UniProtKB:  P56640
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: BACK CALCULATED DATA AGREE WITH EXPERIMENTAL NOESY SPECTRUM,STRUCTURES WITH ACCEPTABLE COVALENT GEOMETRY 
  • Olderado: 1DG2 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-02-25
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance