Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 3565.05 
• Atom Count: 244 
• Residue Count: 31 
• Unique protein chains: 1

1CMR

NMR SOLUTION STRUCTURE OF A CHIMERIC PROTEIN, DESIGNED BY TRANSFERRING A FUNCTIONAL SNAKE BETA-HAIRPIN INTO A SCORPION ALPHA/BETA SCAFFOLD (PH 3.5, 20C), NMR, 18 STRUCTURES

• DOI: 10.2210/pdb1CMR/pdb

• Classification: CURAREMIMETIC PROTEIN
• Organism(s): Leiurus hebraeus
• Mutation(s): 8 


• Deposited: 1996-03-15 Released: 1996-08-01 
• Deposition Author(s): Zinn-Justin, S., Guenneugues, M., Drakopoulou, E., Gilquin, B., Vita, C., Menez, A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 18 

Literature

Transfer of a beta-hairpin from the functional site of snake curaremimetic toxins to the alpha/beta scaffold of scorpion toxins: three-dimensional solution structure of the chimeric protein.

Zinn-Justin, S., Guenneugues, M., Drakopoulou, E., Gilquin, B., Vita, C., Menez, A.

(1996) Biochemistry 35: 8535-8543

• PubMed: 8679614 
• DOI: 10.1021/bi960466n


• PubMed Abstract: 
  

The alpha/beta scorpion fold is shared by scorpion toxins, insect defensins, and plant thionins. This small and functionally versatile template contains an alpha-helix and a triple beta-sheet linked by three disulfide bridges. With the view to introduce novel functional centers within this fold, we replaced the sequence (the cysteines and glycines excepted) of the original beta-hairpin of a scorpion toxin by the sequence of a beta-hairpin that forms part of the site by which snake neurotoxins bind to nicotinic acetylcholine receptors (AcChOR). The resulting chimeric protein, synthesized by chemical means, binds to AcChOR, though with a lower affinity than the snake toxins [Drakopoulou; E., Zinn-Justin, S., Guenneugues, M., Gilquin, B., Ménez, A., & Vita, C. (1996) J. Biol. Chem. 271, 11979-11987]. The work described in this paper is an attempt to clarify the structural consequences associated with the transfer of the beta-hairpin. We report the determination of the three-dimensional solution structure of the chimeric protein by proton NMR spectroscopy and molecular dynamics calculations. Comparison of the structure of the chimera with those of the scorpion alpha/beta toxin and of the snake neurotoxin shows that (i) the new protein folds as an alpha/beta motif and (ii) the beta-hairpins of the chimera and of the curaremimetic toxin adopt a similar conformation. A closer inspection of the differences between the structures of the original and transferred beta-hairpins allows rationalization of the biological properties of the chimera.

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Related Citations: 

• Changing the Structural Context of a Functional Beta-Hairpin. Synthesis and Characterization of a Chimera Containing the Curaremimetic Loop of a Snake Toxin in the Scorpion Alpha/Beta Scaffold
  Drakopoulou, E.,Zinn-Justin, S.,Guenneugues, M.,Gilquin, B.,Vita, C.,Menez, A.
  () TO BE PUBLISHED --: --




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Organizational Affiliation: 

CEA, Département d'Ingénierie et d'Etude des Protéines, Gif-sur-Yvette, France. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CHARYBDOTOXIN, ALPHA CHIMERA	A	31	Leiurus hebraeus	Mutation(s): 8
Find proteins for P13487 (Leiurus hebraeus) Go to UniProtKB:  P13487

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 18 
• Olderado: 1CMR Olderado

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-03-15 
• Released Date: 1996-08-01 
• Deposition Author(s): Zinn-Justin, S., Guenneugues, M., Drakopoulou, E., Gilquin, B., Vita, C., Menez, A.

Revision History 

• Version 1.0: 1996-08-01
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-11-29
  Type: Derived calculations, Other