1DEN

PROTEINASE INHIBITOR HOMOLOGUES AS POTASSIUM CHANNEL BLOCKERS

• PDB DOI: https://doi.org/10.2210/pdb1DEN/pdb

• Classification: VENOM(POTASSIUM CHANNEL INHIBITOR)
• Organism(s): Dendroaspis polylepis polylepis
• Mutation(s): No 


• Deposited: 1994-03-07 Released: 1994-05-31 
• Deposition Author(s): Lancelin, J.-M., Foray, M.-F.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 29 

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

• PubMed: 7544683 
• 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.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 7.17 kDa 
• Atom Count: 500 
• Modelled Residue Count: 60 
• Deposited Residue Count: 60 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DENDROTOXIN I	A	60	Dendroaspis polylepis polylepis	Mutation(s): 0
UniProt
Find proteins for P00979 (Dendroaspis polylepis polylepis) Explore P00979  Go to UniProtKB:  P00979

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 29 

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-05-31 
Deposition Author(s): Lancelin, J.-M., Foray, M.-F.

Revision History  

• 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