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Position: Home > Articles > Study on Preparation of Polypeptide from Peanut Protein by Immobilized Trypsin Hydrolysis FOOD SCIENCE 2008,29 (8) 164-168

固定化胰蛋白酶水解花生蛋白制备多肽的研究

作  者:
高明侠;苗敬芝;曹泽虹;董玉玮;吕兆启
单  位:
徐州工程学院生物工程学院
关键词:
固定化;胰蛋白酶;海藻酸钠;花生蛋白;多肽
摘  要:
以海藻酸钠为载体,戊二醛为交联剂固定化胰蛋白酶,考察固定化工艺的选择、固定化酶水解花生蛋白的优化条件及固定化酶的稳定性。结果表明:海藻酸钠固定化胰蛋白酶的最佳条件为:海藻酸钠浓度3%、加酶量4%、戊二醛浓度3%、氯化钙浓度0.2mol/L。此条件下酶活力回收率为50.34%。水解花生蛋白的最佳条件为:固液化1:20、pH7.5、温度60℃、时间6h、加酶量5%,此条件下氨基氮含量最高为1.57mg/ml。固定化酶重复使用7次,酶活力仍保持50%以上。
译  名:
Study on Preparation of Polypeptide from Peanut Protein by Immobilized Trypsin Hydrolysis
作  者:
GAO Ming-xia,MIAO Jing-zhi,CAO Ze-hong,DONG Yu-wei,L Zhao-qi(School of Bioengineering,Xuzhou Institute of Technology,Xuzhou 221008,China)
关键词:
immobilization;trypsin;sodium acetylide;peanut protein;polypeptide ..
摘  要:
Sodium acetylide was used as carrier and glutaraldehyde was used as cross-linking agent for immobilization of trypsion. The immobilized conditions of trypsin and stability of immobilized trypsin as well as its application in hydrolyzing peanut protein were studied. The results showed that the optimal conditions for immobilizing trypsin are sodium acetylide concentration 3%,quantity of trypsin 4%,glutaraldehyde concentration 3% and CaCl2 concentration 0.2 mol/L. Under these conditions,the recovery rate of trypsin activity is 50.34%. The optimal conditions for hydrolyzing peanut protein are ratio of solid to liquid(W/V) 1:20,pH 7.5,temperature 60 ℃ and quantity of immobilized trypsin 5%. Under these conditions,the highest amount of amino nitrogen is 1.57 mg/ml. After being used for 7 times repeatedly,more than 50% activity of immobilized trypsin remains.

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