1PEN

ALPHA-CONOTOXIN PNI1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.152 
  • R-Value Work: 0.127 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The 1.1 A crystal structure of the neuronal acetylcholine receptor antagonist, alpha-conotoxin PnIA from Conus pennaceus.

Hu, S.H.Gehrmann, J.Guddat, L.W.Alewood, P.F.Craik, D.J.Martin, J.L.

(1996) Structure 4: 417-423


  • PubMed Abstract: 
  • alpha-Conotoxins are peptide toxins, isolated from Conus snails, that block the nicotinic acetylcholine receptor (nAChR). The 16-residue peptides PnIA and PnIB from Conus pennaceus incorporate the same disulfide framework as other alpha-conotoxins bu ...

    alpha-Conotoxins are peptide toxins, isolated from Conus snails, that block the nicotinic acetylcholine receptor (nAChR). The 16-residue peptides PnIA and PnIB from Conus pennaceus incorporate the same disulfide framework as other alpha-conotoxins but differ in function from most alpha-conotoxins by blocking the neuronal nAChR, rather than the skeletal muscle subtype. The crystal structure determination of PnIA was undertaken to identify structural and surface features that might be important for biological activity.


    Related Citations: 
    • New Mollusc-Specific Alpha-Conotoxins Block Aplysia Neuronal Acetylcholine Receptors
      Fainzilber, M.,Hasson, A.,Oren, R.,Burlingame, A.L.,Gordon, D.,Spira, M.E.,Zlotkin, E.
      (1994) Biochemistry 33: 9523
    • Snb: Crystal Structure Determination Via Shake-and-Bake
      Miller, R.,Gallo, S.M.,Khalak, H.G.,Weeks, C.M.
      (1994) J.Appl.Crystallogr. 27: 613


    Organizational Affiliation

    Centre for Drug Design and Development, University of Queensland, St Lucia, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA-CONOTOXIN PNIA
A
17Conus pennaceusN/A
Find proteins for P50984 (Conus pennaceus)
Go to UniProtKB:  P50984
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: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.152 
  • R-Value Work: 0.127 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 15.000α = 90.00
b = 19.800β = 113.40
c = 16.500γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
DENZOdata reduction
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-04-21
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance