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http://dx.doi.org/10.5851/kosfa.2021.e27

Endogenous Proteolytic Systems and Meat Tenderness: Influence of Post-Mortem Storage and Processing  

Kaur, Lovedeep (School of Food and Advanced Technology, Massey University)
Hui, Seah Xin (School of Food and Advanced Technology, Massey University)
Morton, James D. (Department of Wine Food and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University)
Kaur, Ramandeep (School of Food and Advanced Technology, Massey University)
Chian, Feng Ming (School of Food and Advanced Technology, Massey University)
Boland, Mike (Riddet Institute, Massey University)
Publication Information
Food Science of Animal Resources / v.41, no.4, 2021 , pp. 589-607 More about this Journal
Abstract
Meat proteolytic systems play a crucial role in meat tenderisation. Understanding the effects of processing technologies and post-mortem storage conditions on these systems is important due to their crucial role in determining the quality characteristics of meat and meat products. It has recently been proposed that tenderisation occurs due to the synergistic action of numerous endogenous proteolytic systems. There is strong evidence suggesting the importance of μ-calpain during the initial post-mortem aging phase, while m-calpain may have a role during long-term aging. The caspase proteolytic system is also a candidate for cell degradation in the initial stages of conversion of muscle to meat. The role of cathepsins, which are found in the lysosomes, in post-mortem aging is controversial. Lysosomes need to be ruptured, through aging, or other forms of processing to release cathepsins into the cytosol for participation in proteolysis. A combination of optimum storage conditions along with suitable processing may accelerate protease activity within meat, which can potentially lead to improved meat tenderness. Processing technologies such as high pressure, ultrasound, and shockwave processing have been reported to disrupt muscle structure, which can facilitate proteolysis and potentially enhance the aging process. This paper reviews the recent literature on the impacts of processing technologies along with post-mortem storage conditions on the activities of endogenous proteases in meat. The information provided in the review may be helpful in selecting optimum post-mortem meat storage and processing conditions to achieve improved muscle tenderness within shorter aging and cooking times.
Keywords
meat; endogenous enzymes; processing; post-mortem storage;
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