Calpain-Dependent Protein Degradation Contributes to CASQ2-R33Q CPVT
Couplon protein loss in CPVT associated with CASQ2-R33Q is mediated by coordinated but distinct proteolytic pathways, with calpain-dependent TRDN degradation representing a key pathogenic event that promotes CASQ2 destabilization and arrhythmogenesis.