Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

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This is version 1.3 of the entry. See complete history


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: https://doi.org/10.1038/nsb0494-246
  • Primary Citation of Related Structures:  
    1DEM, 1DEN

  • 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 < 1.7 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.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DENDROTOXIN I60Dendroaspis polylepis polylepisMutation(s): 0 
Find proteins for P00979 (Dendroaspis polylepis polylepis)
Explore P00979 
Go to UniProtKB:  P00979
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00979
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

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
  • Version 1.3: 2022-02-16
    Changes: Data collection, Database references, Derived calculations, Other