Catalytic activity:Broad endopeptidase specificity. ,cofactor:Binds 3 calcium ions. ,enzyme regulation:Activated by micromolar concentrations of calcium and inhibited by calpastatin. ,Function:Calcium-regulated non-lysosomal thiol-protease which catalyze limited proteolysis of substrates involved in cytoskeletal remodeling and signal transduction. ,online information:Calpain ,similarity:Belongs to the peptidase C2 family. ,similarity:Contains 1 calpain catalytic domain. ,similarity:Contains 4 EF-hand domains. ,subcellular location:Translocates to the plasma membrane upon Ca (2+) binding. ,subunit:Forms a heterodimer with a small (regulatory) subunit (CAPNS1) . ,tissue specificity:Ubiquitous. ,
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