The Affection of Calpastatin to Meat Quality

Calpain system consists of u-calpain,m-calpain,the calcium-dependent neutral proteases,and their endogenous inhibitor,calpastatin.Calpain system is probably the major proteolytic in protein degradation,Calpastatin(CAST)is the endogenous inhibitor of calpain system,which plays an important role in myofibrillar protein degradation.The muscle growth and postmortem tenderization of meat are highly related to the degree of Calpastatin,so the activity of Calpastatin has an important effect on muscle growth and meat tenderness.This paper reviews the structure,function and regulation of Calpastatin and the relationship between Calpastatin and meat tenderness and gene orientation.