1UL2 | pdb_00001ul2

Solution Conformation of alpha-Conotoxin GIC

• PDB DOI: https://doi.org/10.2210/pdb1UL2/pdb
• BMRB: 5985

• Classification: TOXIN
• Organism(s): Conus geographus
• Mutation(s): No 


• Deposited: 2003-09-06 Released: 2004-07-20 
• Deposition Author(s): Chi, S.-W., Kim, D.-H., Olivera, B.M., McIntosh, J.M., Han, K.-H.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Solution conformation of alpha-conotoxin GIC, a novel potent antagonist of alpha3beta2 nicotinic acetylcholine receptors

Chi, S.-W., Kim, D.-H., Olivera, B.M., McIntosh, J.M., Han, K.-H.

(2004) Biochem J 380: 347-352

• PubMed: 14992691 
• DOI: https://doi.org/10.1042/BJ20031792
• Primary Citation Related Structures: 
  1UL2


• PubMed Abstract: 
  

  Alpha-conotoxin GIC is a 16-residue peptide isolated from the venom of the cone snail Conus geographus. Alpha-conotoxin GIC potently blocks the alpha3beta2 subtype of human nicotinic acetylcholine receptor, showing a high selectivity for neuronal versus muscle subtype [McIntosh, Dowell, Watkins, Garrett, Yoshikami, and Olivera (2002) J. Biol. Chem. 277, 33610-33615]. We have now determined the three-dimensional solution structure of alpha-conotoxin GIC by NMR spectroscopy. The structure of alpha-conotoxin GIC is well defined with backbone and heavy atom root mean square deviations (residues 2-16) of 0.53 A and 0.96 A respectively. Structure and surface comparison of alpha-conotoxin GIC with the other alpha4/7 subfamily conotoxins reveals unique structural aspects of alpha-conotoxin GIC. In particular, the structural comparison between alpha-conotoxins GIC and MII indicates molecular features that may confer their similar receptor specificity profile, as well as those that provide the unique binding characteristics of alpha-conotoxin GIC.

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Organizational Affiliation: 
• Laboratory of Protein Analysis and Design, Division of Drug Discovery, Korea Research Institute of Bioscience and Biotechnology, Yusong P.O. Box 115, Daejon, Korea.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 1.61 kDa 
• Atom Count: 109 
• Modeled Residue Count: 17 
• Deposited Residue Count: 17 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
alpha-conotoxin GIC	A	17	N/A	Mutation(s): 0
UniProt
Find proteins for Q86RB2 (Conus geographus) Explore Q86RB2  Go to UniProtKB:  Q86RB2

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-07-20 
Deposition Author(s): Chi, S.-W., Kim, D.-H., Olivera, B.M., McIntosh, J.M., Han, K.-H.

Revision History  

• Version 1.0: 2004-07-20
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2023-12-27
  Changes: Data collection
• Version 1.5: 2024-11-20
  Changes: Structure summary