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How calpain is activated by calcium

The discovery of two unexpected Ca2+-binding sites in the structure of a minimal catalytic domain of μ-calpain reveals a new mechanism underlying the Ca2+-dependent activation of calpains.

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Figure 1: Schematic diagram of human m-calpain.
Figure 2: Ribbon drawings of the protease domain (dII) of calpain in a, the absence6 and b, the presence4 of calcium.

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Correspondence to Mitsuhiko Ikura.

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Khorchid, A., Ikura, M. How calpain is activated by calcium. Nat Struct Mol Biol 9, 239–241 (2002). https://doi.org/10.1038/nsb0402-239

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