This gene encodes a member of the CSRP family of LIM domain proteins, which may be involved in regulatory processes important for development and cellular differentiation. The LIM/double zinc-finger motif found in this protein is found in a group of proteins with critical functions in gene regulation, cell growth, and somatic differentiation. Mutations in this gene are thought to cause heritable forms of hypertrophic cardiomyopathy (HCM) and dilated cardiomyopathy (DCM) in humans. Alternatively spliced transcript variants with different 5' UTR, but encoding the same protein, have been found for this gene. [provided by RefSeq, Jul 2008]
Function:
Positive 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.
Subcellular Location:
Nucleus. 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.
Tissue Specificity:
Cardiac and slow-twitch skeletal muscles.
DISEASE:
Defects 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.
Similarity:
Contains 2 LIM zinc-binding domains.
SWISS:
P50461
Gene ID:
8048
Database links:
Entrez Gene: 8048 Human
Entrez Gene: 540407 Cow
Entrez Gene: 13009 Mouse
Entrez Gene: 100337687 Pig
Entrez Gene: 117505 Rat
Omim: 600824 Human
SwissProt: Q4U0T9 Cow
SwissProt: P50461 Human
SwissProt: P50462 Mouse
SwissProt: P50463 Rat
Unigene: 83577 Human
Unigene: 17235 Mouse
Unigene: 11345 Rat
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