Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8502767 | Meat Science | 2018 | 6 Pages |
Abstract
The effects of nitric oxide (NO) and its induced protein nitrosylation on calpain-1 activation and protein proteolysis in beef during postmortem aging were investigated. Five semimembranosus muscles were removed from beef cattle carcass. Beef samples were incubated with one of following treatments for 24â¯h at 4â¯Â°C: control (normal saline), NO donor (100, 200 and 400â¯Î¼Mâ¯S-nitrosoglutathione (GSNO)) or nitric oxide synthase (NOS) inhibitor (0.05, 0.1 and 0.15â¯M NÏ-Nitro-l-arginine methyl ester hydrochloride (L-NAME)). After incubation, the beef samples were vacuum-packaged and aged at 4â¯Â°C for 1, 4, and 7â¯days. Results showed that GSNO decreased and L-NAME increased the extent of calpain-1 autolysis at d 1. Degradation of desmin and troponin-T was increased by L-NAME while decreased by GSNO. These results suggest that NO could regulate calpain-1 autolysis and its proteolysis activity during postmortem aging in beef SM muscle.
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Authors
Chaoyang Zhang, Rui Liu, Anran Wang, Dacheng Kang, Guanghong Zhou, Wangang Zhang,