Journal
EUROPEAN JOURNAL OF BIOCHEMISTRY
Volume 271, Issue 12, Pages 2320-2326Publisher
WILEY
DOI: 10.1111/j.1432-1033.2004.04148.x
Keywords
NMR; peptide; X-ray crystallography
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alpha-Conotoxins that target the neuronal nicotinic acetylcholine receptor have a range of potential therapeutic applications and are valuable probes for examining receptor subtype selectivity. The three-dimensional structures of about half of the known neuronal specific alpha-conotoxins have now been determined and have a consensus fold containing a helical region braced by two conserved disulfide bonds. These disulfide bonds define the two-loop framework characteristic for alpha-conotoxins, CCXmCXnC, where loop 1 comprises four residues (m = 4) and loop 2 between three and seven residues (n = 3, 6 or 7). Structural studies, particularly using NMR spectroscopy have provided an insight into the role and spatial location of residues implicated in receptor binding and biological activity.
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