Junctophilin-1 (JPH1)

Junctophilins contribute to the formation of junctional membrane complexes (JMCs) which connect the plasma membrane with the endoplasmic or sarcoplasmic reticulum in excitable cells. Provides a structural base for functional cross-talk between the cell surface and intracellular calcium release channels.

JPH1 contributes to the building of the skeletal muscle triad by linking the t-tubule (transverse-tubule) and SR (sarcoplasmic reticulum) membranes. .