1FAS

1.9 ANGSTROM RESOLUTION STRUCTURE OF FASCICULIN 1, AN ANTI-ACETYLCHOLINESTERASE TOXIN FROM GREEN MAMBA SNAKE VENOM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Work: 0.149 
  • R-Value Observed: 0.149 

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This is version 1.3 of the entry. See complete history


Literature

1.9-A resolution structure of fasciculin 1, an anti-acetylcholinesterase toxin from green mamba snake venom.

le Du, M.H.Marchot, P.Bougis, P.E.Fontecilla-Camps, J.C.

(1992) J Biol Chem 267: 22122-22130

  • DOI: 10.2210/pdb1fas/pdb
  • Primary Citation of Related Structures:  
    1FAS

  • PubMed Abstract: 
  • The crystal structure of fasciculin 1, a potent acetylcholinesterase inhibitor from green mamba snake venom, has been solved by the multiple isomorphous replacement method complemented with anomalous scattering and subsequently refined at 1.9-A resolution ...

    The crystal structure of fasciculin 1, a potent acetylcholinesterase inhibitor from green mamba snake venom, has been solved by the multiple isomorphous replacement method complemented with anomalous scattering and subsequently refined at 1.9-A resolution. The overall structure of fasciculin is similar to those of the short alpha-neurotoxins and cardiotoxins, with a dense core rich in disulfide bridges and three long loops disposed as the central fingers of a hand. A comparison of these three prototypic toxin types shows that fasciculin 1 has structural features that are intermediate between those of the other two molecules. Its core region, which can be defined as a continuous stretch of conserved residues, is very similar to that of erabutoxin b, whereas the orientation of its long loops resembles that of cardiotoxin VII4. This result introduces a new element in the study of phylogenetic relationships of snake toxins and suggests that, after divergency from an ancestral gene, convergent evolution may have played an important factor in the evolution of these proteins. In fasciculin 1, several arginine and lysine residues are well ordered and relatively exposed to the solvent medium and may play a role in the binding to the peripheral site of acetylcholinesterases.


    Related Citations: 
    • Crystals of Fasciculin 2 from Green Mamba Snake Venom. Preparation and Preliminary X-Ray Analysis
      Le Du, M.H., Marchot, P., Bougis, P.E., Fontecilla-Camps, J.C.
      (1989) J Biol Chem 264: 21401

    Organizational Affiliation

    Laboratoire de Cristallographie et Cristallogénèse des Protéines, Département d'Ingéniérie et d'Etudes des Protéines, DSV, CENG, Grenoble, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FASCICULIN 1A61Dendroaspis angusticepsMutation(s): 0 
UniProt
Find proteins for P0C1Y9 (Dendroaspis angusticeps)
Explore P0C1Y9 
Go to UniProtKB:  P0C1Y9
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Work: 0.149 
  • R-Value Observed: 0.149 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.3α = 90
b = 40.3β = 90
c = 81.3γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1993-10-31
    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: 2017-11-29
    Changes: Advisory, Derived calculations, Other