Abstract
Calpains are ubiquitous intracellular calcium- and thiol-dependent proteases. Their over activation, resulting in the degradation of various substrates, has been implicated in a number of cardiovascular and neurological disorders. Here, we present the first structural characterization of LSEAL penta-peptide, a potent calpain inhibitor, bound to the calmodulin-like domain of calpain. Our in vitro binding data supports the idea that domains other than calpain’s active site may be suitable targets for future development of therapeutic agents to be used to treat heart attack, traumatic brain injuries or a variety of neurodegenerative conditions, such as ischemic stroke.
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