JSRP1
Function
Involved in skeletal muscle excitation/contraction coupling (EC), probably acting as a regulator of the voltage-sensitive calcium channel CACNA1S. EC is a physiological process whereby an electrical signal (depolarization of the plasma membrane) is converted into a chemical signal, a calcium gradient, by the opening of ryanodine receptor calcium release channels. May regulate CACNA1S membrane targeting and activity.
Cellular localization
- Sarcoplasmic reticulum membrane
- Endoplasmic reticulum membrane
- Colocalizes with ryanodine receptors at the sarcoplasmic reticulum triad membranes.
Alternative names
JP45, JSRP1, Junctional sarcoplasmic reticulum protein 1, Junctional-face membrane protein of 45 kDa homolog, JP-45