1UL2 image
Deposition Date 2003-09-06
Release Date 2004-07-20
Last Version Date 2024-11-20
Entry Detail
PDB ID:
1UL2
Keywords:
TOXIN
Title:
Solution Conformation of alpha-Conotoxin GIC
Biological Source:
Source Organism:
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
50
Conformers Submitted:
20
Selection Criteria:
structures with the lowest energy
1UL2 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:alpha-conotoxin GIC
Chain IDs:A
Chain Length:17
Number of Molecules:1
Biological Source:
UniProt ID:Q86RB2 Pfam ID:PF07365
Ligand Molecules
NA
Primary Citation
Solution conformation of alpha-conotoxin GIC, a novel potent antagonist of alpha3beta2 nicotinic acetylcholine receptors
Biochem.J. 380 347 352 (2004)
PMID: 14992691 DOI: 10.1042/BJ20031792

Abstact

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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Primary Citation of related structures
1UL2