| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
In this research, we found the important basic knowledge to clarify the mechanism of fish muscle softening during storage. From the results of proteomics of red sea bream muscle, myosin heavy chain was degraded and solubilized, while tropomyosin was degraded during storage. The degradation products were detected after storage of the fish. In addition, we tried to figure out the protease which related to degrade each myofibrillar protein. Our results suggested that endogenous serine proteases and metalloproteinases were involved in degradation of most of the myofibrillar components (including myosin heavy chain, tropomyosin) while α-actinin was hydrolyzed only by cysteine proteases in red sea bream muscle. Moreover, we investigated structure and function of endogenous proteases from fish muscle by purification and molecular cloning of the enzymes. From these results, the antibodies against the endogenous proteases were produced and chosen to detect them by immunohistochemistry.
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