Download MendeleyDevelopment of a mu O-Conotoxin Analogue with Improved Lipid Membrane Interactions and Potency for the Analgesic Sodium Channel NaV1.8.
Deuis, J.R., Dekan, Z., Inserra, M.C., Lee, T.H., Aguilar, M.I., Craik, D.J., Lewis, R.J., Alewood, P.F., Mobli, M., Schroeder, C.I., Henriques, S.T., Vetter, I.(2016) J Biol Chem 291: 11829-11842
- PubMed: 27026701
- DOI: https://doi.org/10.1074/jbc.M116.721662
- Primary Citation of Related Structures:
2N7F - PubMed Abstract:
The μO-conotoxins MrVIA, MrVIB, and MfVIA inhibit the voltage-gated sodium channel NaV1.8, a well described target for the treatment of pain; however, little is known about the residues or structural elements that define this activity. In this study, we determined the three-dimensional structure of MfVIA, examined its membrane binding properties, performed alanine-scanning mutagenesis, and identified residues important for its activity at human NaV1.8. A second round of mutations resulted in (E5K,E8K)MfVIA, a double mutant with greater positive surface charge and greater affinity for lipid membranes compared with MfVIA. This analogue had increased potency at NaV1.8 and was analgesic in the mouse formalin assay.
Organizational Affiliation:
From the Institute for Molecular Bioscience and School of Pharmacy, The University of Queensland, Woolloongabba, Queensland 4102, Australia, and.
