Nav1.5 is a sodium channel that is primarily found in cardiac muscle where it is responsible for action potential generation/cardiac muscle contraction. Nav1.5 is not a classic cannabinoid receptor but its activity is modulated by cannabinoids. Since cannabinoids have a physiological effect on Nav1.5 it is effectively a cannabinoid receptor.
Hill, A.J., Jones, N.A., Smith, I., Hill, C.L., Williams, C.M., Stephens, G.J., and Whalley, B.J. (2014). Voltage-gated sodium (NaV) channel blockade by plant cannabinoids does not confer anticonvulsant effects per se. Neurosci. Lett. 566, 269–274.
Nav1.5 is predominantly present in cardiac muscle.
For an interactive version, please visit https://www.proteinatlas.org