FunctionPositive regulator of myogenesis. Plays a crucial and specific role in the organization of cytosolic structures in cardiomyocytes. Could play a role in mechanical stretch sensing. May be a scaffold protein that promotes the assembly of interacting proteins at Z-line structures. It is essential for calcineurin anchorage to the Z line. Required for stress-induced calcineurin-NFAT activation.
Tissue specificityCardiac and slow-twitch skeletal muscles.
Involvement in diseaseDefects in CSRP3 are the cause of cardiomyopathy dilated type 1M (CMD1M) [MIM:607482]. Dilated cardiomyopathy is a disorder characterized by ventricular dilation and impaired systolic function, resulting in congestive heart failure and arrhythmia. Patients are at risk of premature death. Defects in CSRP3 are the cause of cardiomyopathy familial hypertrophic type 12 (CMH12) [MIM:612124]. Familial hypertrophic cardiomyopathy is a hereditary heart disorder characterized by ventricular hypertrophy, which is usually asymmetric and often involves the interventricular septum. The symptoms include dyspnea, syncope, collapse, palpitations, and chest pain. They can be readily provoked by exercise. The disorder has inter- and intrafamilial variability ranging from benign to malignant forms with high risk of cardiac failure and sudden cardiac death.
Cellular localizationNucleus. Cytoplasm. Cytoplasm > cytoskeleton. Cytoplasm > myofibril > sarcomere > Z line. Mainly cytoplasmic (By similarity). In the nucleus it associates with the actin cytoskeleton (Potential). In the Z line, found associated with GLRX3.