Calsequestrin 2 Proteins

Protein Information

Calsequestrin (CASQ) is a Ca2+-binding protein present primarily in junctional sarcoplasmic reticulum of skeletal and cardiac muscle; the cardiac form (CASQ2) is encoded by a separate gene. The primary role of CASQ2 is buffering of the sarcoplasmic reticulum Ca2+ ions, but another role for CASQ2 has emerged recently: CASQ2 regulates the open probability of ryanodine receptor 2 (RyR2). Mutations in CASQ2 cause stress-induced polymorphic ventricular tachycardia, also referred to as catecholaminergic polymorphic ventricular tachycardia 2 (CPVT2), a disease characterized by bidirectional ventricular tachycardia that may lead to cardiac arrest.

Synonyms

AA033488; AW146219; calsequestrin; calsequestrin 2; calsequestrin 2 (cardiac muscle); calsequestrin 2, fast-twitch, cardiac muscle; calsequestrin, cardiac muscle isoform; Calsequestrin-2; cardCSQ; cardiac calsequestrin; Casq2; cCSQ; Csq2; ESTM52; LOW QUALITY PROTEIN: calsequestrin-2; PDIB2; SR calcium binding protein