1DEM

PROTEINASE INHIBITOR HOMOLOGUES AS POTASSIUM CHANNEL BLOCKERS


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

Proteinase inhibitor homologues as potassium channel blockers.

Lancelin, J.M.Foray, M.F.Poncin, M.Hollecker, M.Marion, D.

(1994) Nat Struct Biol 1: 246-250

  • DOI: 10.1038/nsb0494-246
  • Primary Citation of Related Structures:  
    1DEN, 1DEM

  • PubMed Abstract: 
  • We report here the NMR structure of dendrotoxin I, a powerful potassium channel blocker from the venom of the African Elapidae snake Dendroaspis polylepis polylepis (black mamba), calculated from an experimentally-derived set of 719 geometric restraints. The backbone of the toxin superimposes on bovine pancreatic trypsin inhibitor (BPTI) with a root-mean-square deviation of < 1 ...

    We report here the NMR structure of dendrotoxin I, a powerful potassium channel blocker from the venom of the African Elapidae snake Dendroaspis polylepis polylepis (black mamba), calculated from an experimentally-derived set of 719 geometric restraints. The backbone of the toxin superimposes on bovine pancreatic trypsin inhibitor (BPTI) with a root-mean-square deviation of < 1.7 A. The surface electrostatic potential calculated for dendrotoxin I and BPTI, reveal an important difference which might account for the differences in function of the two proteins. These proteins may provide examples of adaptation for specific and diverse biological functions while at the same time maintaining the overall three-dimensional structure of a common ancestor.


    Related Citations: 
    • Sequence-Specific 1H-NMR Assignment and Secondary Structure of Black Mamba Dendrotoxin I, a Highly Selective Blocker of Voltage-Gated Potassium Channels
      Foray, M.-F., Lancelin, J.-M., Hollecker, M., Marion, D.
      (1993) Eur J Biochem 211: 813

    Organizational Affiliation

    Institute de Biologie Structurale CEA-CNRS, Grenoble, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DENDROTOXIN IA60Dendroaspis polylepis polylepisMutation(s): 0 
UniProt
Find proteins for P00979 (Dendroaspis polylepis polylepis)
Explore P00979 
Go to UniProtKB:  P00979
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

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

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-05-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance