Download MendeleyCharacterisation of Elevenin-Vc1 from the Venom of Conus victoriae : A Structural Analogue of alpha-Conotoxins.
Krishnarjuna, B., Sunanda, P., Seow, J., Tae, H.S., Robinson, S.D., Belgi, A., Robinson, A.J., Safavi-Hemami, H., Adams, D.J., Norton, R.S.(2023) Mar Drugs 21
- PubMed: 36827123
- DOI: https://doi.org/10.3390/md21020081
- Primary Citation of Related Structures:
8F04 - PubMed Abstract:
Elevenins are peptides found in a range of organisms, including arthropods, annelids, nematodes, and molluscs. They consist of 17 to 19 amino acid residues with a single conserved disulfide bond. The subject of this study, elevenin-Vc1, was first identified in the venom of the cone snail Conus victoriae ( Gen. Comp. Endocrinol. 2017 , 244 , 11-18). Although numerous elevenin sequences have been reported, their physiological function is unclear, and no structural information is available. Upon intracranial injection in mice, elevenin-Vc1 induced hyperactivity at doses of 5 or 10 nmol. The structure of elevenin-Vc1, determined using nuclear magnetic resonance spectroscopy, consists of a short helix and a bend region stabilised by the single disulfide bond. The elevenin-Vc1 structural fold is similar to that of α-conotoxins such as α-RgIA and α-ImI, which are also found in the venoms of cone snails and are antagonists at specific subtypes of nicotinic acetylcholine receptors (nAChRs). In an attempt to mimic the functional motif, Asp-Pro-Arg, of α-RgIA and α-ImI, we synthesised an analogue, designated elevenin-Vc1-DPR. However, neither elevenin-Vc1 nor the analogue was active at six different human nAChR subtypes (α1β1εδ, α3β2, α3β4, α4β2, α7, and α9α10) at 1 µM concentrations.
Organizational Affiliation:
Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia.
