The human Nav1.1 sodium channel: Structure, Function, Drug Binding and Molecular Dynamics of Homologues Bearing Disease-Related Mutations

Professor Bonnie Ann Wallace (primary)
Biological Sciences
Birkbeck
Dr. Martin Ulmschneider (secondary)
Chemistry
Kings College London

Abstract

Voltage-gated sodium channels (Navs) play essential roles in nerve signal transmission, as their opening initiates the action potential. Mutations in the human hNav1.1 isoform produce a range of diseases, including epilepsy. hNav1.1 therefore represents a key target for pharmaceutical drug development. Using the prokaryotic NavMs (whose crystal structure we have determined), which has highly similar structural and functional properties to hNav1.1, the student will create mutants associated with hNav1.1 diseases, and examine their effects on a molecular level using crystallography, cryoEM, molecular dynamics calculations, and biophysical, biochemical, and functional characterizations, using this information to explore potential new drug candidates.


References

Sula, A., Booker, J., Ng, L.C.T., Naylor, C.E., DeCaen, P.G., and Wallace, B.A. (2017) The complete structure of an activated open
sodium channel. Nature Comms. 8:14205.
Ireland, S.M., Sula, A., and Wallace, B.A. (2018) Thermal Melt Circular Dichroism Spectroscopic Studies for Identifying Stabilising
Amphipathic Molecules for the Voltage-Gated Sodium Channel NavMs. Biopolymers, DOI: 10.1002/bip.23067
Sula, A. and Wallace, B.A (2017). Interpreting the functional role of a novel interaction motif in prokaryotic sodium channels. J. Gen.
Phys. 149:613-622.
Penny, C.J., Rahman, T., Sula, A., Miles, A.J., Wallace, B.A. Patel, S. (2016) Isolated pores dissected from
human two-pore channel 2 are functional. Scientific Reports 6:38426.
Naylor, C.E., Bagnéris, C., DeCaen, P.G., Sula, A., Scaglione, A., Clapham, D.E. and Wallace, B.A. (2016) Molecular basis of ion
permeability in a voltage-gated sodium channel. EMBO J 35:820-830.
Miles, A.J., and Wallace, B.A. (2016) Circular dichroism spectroscopy of membrane proteins. Chem. Soc. Reviews 45:4859-4872. Ulmschneider, M.B., Bagnéris, C., McCusker, E.C., DeCaen, P.G., Delling, M., Clapham, D.E., Ulmschneider, J.P. and Wallace,
B.A. (2013) Molecular dynamics of ion transport through the open conformation of a bacterial voltage-gated sodium channel.
Proc. Nat. Acad. Sci. USA 110, 6364-6369.


BBSRC Area
Molecules, cells and industrial biotechnology
Area of Biology
BiotechnologyStructural Biology
Techniques & Approaches
BiochemistryBioinformaticsBiophysicsChemistryImage ProcessingMicroscopy / ElectrophysiologyMolecular BiologySimulation / Modelling