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      • Differentially Rice Protein Expression Between Rice Bran and Endosperm

        ( Ting-yu Chen ),( De-min Wu ),( Ji-jyun Lai ),( Chang-yue Li ),( Hui-fen Liao ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

        Rice (Oryza sativa L.), the major staple food for more than 60% of the world’s population, offer nutritional and health-enhancing properties. Therefore, breeding of new rice species has been fueled by the rising interest in Asian, Latin cuisines, and many countries. In Asia, rice and rice-based ingredients also appeal to both consumers and processors due to their unique combination of taste, nutrition, texture, and biological properties. Proteins and starch in rice are the two major components in rice seed, with approximately 8 and 80%, respectively. Especially in traditional Asian diet, rice seed contributes to about 28-54% of the protein source. The major rice proteins, including structural, metabolic, protective, and storage proteins, serve as sources of nitrogen, sulfur, and carbon for several important physiological functions. In our previous study also demonstrated that rice protein prolamin activated human mononuclear cells to produce cytokines and enhance anti-leukemic immunity. The present study aimed to compare the differentially expression of rice proteins with bran and endosperm by 2-dimentional electrophoresis (2-DE) and mass spectrometric assay. Several protein spots in 2-DE gel with different expression were isolated and identified. The results showed that the major proteins were metabolic, transporter, storage, antioxidant, disease resistant, and development-related proteins. Further investigation to clarify the different manifestations and functions of these proteins might contribute to development of new rice varieties and breeding with unique features.

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