Preparation,isolation and hypothermia protection activity of antifreeze peptides from shark skin collagen |
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Authors: | Shaoyun Wang Jun Zhao Lin Chen Yanfu Zhou Jinhong Wu |
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Affiliation: | 1. Department of Food Science, College of Biological Science and Technology, Fuzhou University, Fuzhou 350002, China;2. Department of Food Science and engineering, Bor S. Luh Food Safety Research Center, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China |
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Abstract: | Antifreeze proteins have characteristics of inhibiting the growth of crystals, decreasing the injury of cells and can retain the structure, texture and quality of productions. The purpose of this study is to obtain natural, safe, high activity antifreeze peptides using various separating means, and to detect their hypothermia protect activity on Lactobacillus bulgaricus. Collagen derived from shark skin was hydrolyzed with Acid Protease. Then the hydrolysate was subsequently added on to SP-Sephadex C-25 column, Sephadex G-50 gel filtration column and C18 Reversed-phase high performance liquid chromatography to acquire a pure component. A purified hydrophilic peptide, named SsC-AFP, with the characteristic of pI < 5.0 and molecular weight of 906 Da, was obtained. The amino acid sequence of SsC-AFP was GAIGPAGPLGP, which consisted of Gly–Pro–x tripeptide repeat sequence. When the concentration of SsC-AFP was 250 μg/mL, the survival rate of L. bulgaricus was up to 90.28%. |
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Keywords: | Antifreeze peptides Isolation Hypothermia protection Shark skin collagen Amino acid sequence Lactobacillus bulgaricus |
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