机构地区: 广州大学化学化工学院
出 处: 《广州大学学报(自然科学版)》 2007年第6期41-44,共4页
摘 要: 以扇贝裙边的酶解产物——蛋白多肽对ACE活性的抑制率作为控制水解程度的指标,确定制备ACE活性抑制肽的最佳酶种及酶解工艺技术条件.通过胰蛋白酶、胃蛋白酶、木瓜蛋白酶、复合风味酶、枯草杆菌蛋白酶5种酶酶解扇贝裙边得到的蛋白多肽对ACE抑制能力的比较发现,5种酶在不同酶解时间所得到的酶解蛋白多肽都具有一定的ACE抑制能力,其中胃蛋白酶酶解蛋白多肽的ACE抑制率最高,为91.33%;再经L9(3)4正交实验对胃蛋白酶酶解工艺条件进行优化,确定酶解反应最佳条件是酶量400 U.g-底1物,pH 2.5,温度32℃,底物浓度(原料∶水)1∶2,酶解时间3 h;试验结果还表明,单酶(胃蛋白酶)的酶解蛋白多肽比复合酶(复合风味酶)和双酶(胃蛋白酶+木瓜蛋白酶)的酶解蛋白多肽对ACE活性的抑制能力都强. The inhibitory rate to angiotensin converting enzyme ( ACE ) activity is induced by the protein hydrolysates and catalyzed by trypsin, pepsin, papain, flavourzyme, subtilisin. The results show that hydrolysate produced by pepsin has the highest ACE inhibitory activity among those five ,which is about 91.33% and its optimal technology condition is obtained. They are 400 U·g^-1, temp. 32℃, pH 2.5, the ratio of solid to liquid 1:2, and 3 h time. The conclusion of experiments suggested that the hydrolysate produced by one single enzyme has higher ACE inhibitory activity than that by two or mixed enzyme.