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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Ohno S, Minoshima S, Kudoh J, Fukuyama R, Shimizu Y, Ohmi-Imajoh S, Shimizu N, Suzuki K (1990). "Four genes for the calpain family locate on four distinct human chromosomes". Cytogenet. Cell Genet. 53 (4): 225–9. doi:10.1159/000132937. PMID2209092.
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.
Dinçer P, Leturcq F, Richard I, Piccolo F, Yalnizoglu D, de Toma C, Akçören Z, Broux O, Deburgrave N, Brenguier L, Roudaut C, Urtizberea JA, Jung D, Tan E, Jeanpierre M, Campbell KP, Kaplan JC, Beckmann JS, Topaloglu H (1997). "A biochemical, genetic, and clinical survey of autosomal recessive limb girdle muscular dystrophies in Turkey". Ann. Neurol. 42 (2): 222–9. doi:10.1002/ana.410420214. PMID9266733. S2CID28524591.
