Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 6.82 kDa 
• Atom Count: 575 
• Modelled Residue Count: 61 
• Deposited Residue Count: 61 
• Unique protein chains: 1

1FAS

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

• DOI: 10.2210/pdb1FAS/pdb

• Classification: TOXIN
• Organism(s): Dendroaspis angusticeps
• Mutation(s): No 


• Deposited: 1992-08-07 Released: 1993-10-31 
• Deposition Author(s): Le Du, M.H., Marchot, P., Bougis, P.E., Fontecilla-Camps, J.C.

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Experimental Data Snapshot

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

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

• PubMed: 1429564 
• 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 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.

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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

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FASCICULIN 1	A	61	Dendroaspis angusticeps	Mutation(s): 0
Find proteins for P0C1Y9 (Dendroaspis angusticeps) Explore P0C1Y9  Go to UniProtKB:  P0C1Y9

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 = 40.3	α = 90
b = 40.3	β = 90
c = 81.3	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1992-08-07 
• Released Date: 1993-10-31 
Deposition Author(s): Le Du, M.H., Marchot, P., Bougis, P.E., Fontecilla-Camps, J.C.

Revision History  

• 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