1DTX

CRYSTAL STRUCTURE OF ALPHA-DENDROTOXIN FROM THE GREEN MAMBA VENOM AND ITS COMPARISON WITH THE STRUCTURE OF BOVINE PANCREATIC TRYPSIN INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Crystal structure of alpha-dendrotoxin from the green mamba venom and its comparison with the structure of bovine pancreatic trypsin inhibitor.

Skarzynski, T.

(1992) J Mol Biol 224: 671-683

  • DOI: 10.1016/0022-2836(92)90552-u
  • Primary Citation of Related Structures:  
    1DTX

  • PubMed Abstract: 
  • The three-dimensional structure of alpha-dendrotoxin (alpha-DTX) from the green mamba (Dendroaspis angusticeps) venom has been determined crystallographically using the method of isomorphous replacement and refined at 2.2 A resolution using a restrained least-squares method ...

    The three-dimensional structure of alpha-dendrotoxin (alpha-DTX) from the green mamba (Dendroaspis angusticeps) venom has been determined crystallographically using the method of isomorphous replacement and refined at 2.2 A resolution using a restrained least-squares method. The crystallographic R-factor is 0.169 for all 3451 measured reflections between 7.0 and 2.2 A. Although the main-chain fold of alpha-DTX is similar to that of homologous bovine pancreatic trypsin inhibitor (BPTI), there are significant differences involving segments of the polypeptide chain close to the "antiprotease site" of BPTI. Comparison of the structure of alpha-DTX with the existing models of BPTI and its complexes with trypsin and kallikrein reveals structural differences that explain the inability of alpha-DTX to inhibit trypsin and chymotrypsin.


    Related Citations: 
    • The Amino Acid Sequences of Two Proteinase Inhibitor Homologues from Dendroaspis Augusticeps Venom
      Joubert, F.J., Taljaard, N.
      (1980) Hoppe Seylers Z Physiol Chem 361: 661

    Organizational Affiliation

    Blackett Laboratory, Imperial College, London, England.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-DENDROTOXINA59Dendroaspis angusticepsMutation(s): 0 
UniProt
Find proteins for P00980 (Dendroaspis angusticeps)
Explore P00980 
Go to UniProtKB:  P00980
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
AL-PEPTIDE LINKINGC5 H7 N O3GLN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Observed: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.53α = 90
b = 39.06β = 90
c = 23.15γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 1991-04-29 
  • Released Date: 1992-01-15 
  • Deposition Author(s): Skarzynski, T.

Revision History  (Full details and data files)

  • Version 1.0: 1992-01-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2019-12-25
    Changes: Derived calculations, Other, Polymer sequence