Calpain-3 is a protein that in humans is encoded by the CAPN3gene.[1][2]
Function
Calpain, a heterodimer consisting of a large and a small subunit, is a major intracellular protease, although its function has not been well established. This gene encodes a muscle-specific member of the calpain large subunit family that specifically binds to titin. Mutations in this gene are associated with limb-girdle muscular dystrophies type 2A. Alternate promoters and alternative splicing result in multiple transcript variants encoding different isoforms and some variants are ubiquitously expressed.[3]
In melanocytic cells CAPN3 gene expression may be regulated by MITF.[4]
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Corasaniti MT, Navarra M, Catani MV, Melino G, Nisticò G, Finazzi-Agrò A (1996). "NMDA and HIV-1 coat protein, GP120, produce necrotic but not apoptotic cell death in human CHP100 neuroblastoma cultures via a mechanism involving calpain". Biochem. Biophys. Res. Commun. 229 (1): 299–304. doi:10.1006/bbrc.1996.1796. PMID8954122.
Kinbara K, Sorimachi H, Ishiura S, Suzuki K (1997). "Muscle-specific calpain, p94, interacts with the extreme C-terminal region of connectin, a unique region flanked by two immunoglobulin C2 motifs". Arch. Biochem. Biophys. 342 (1): 99–107. doi:10.1006/abbi.1997.0108. PMID9185618.
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