Mediates the voltage-dependent sodium ion permeability of excitable membranes. Assuming opened or closed conformations in response to the voltage difference across the membrane, the protein forms a sodium-selective channel through which Na+ ions may pass in accordance with their electrochemical gradient. It is a tetrodotoxin-sensitive Na+ channel isoform. Plays a role in pain mechanisms, especially in the development of inflammatory pain By similarity.
Klugbauer N., EMBO J. 14:1084-1090(1995).
Cox J.J., Nature 444:894-898(2006).
Raymond C.K., J. Biol. Chem. 279:46234-46241(2004).