Drying technology of angiotensin converting enzyme （ACE） inhibitory peptides derived from bovine casein was investigated. No significance was observed on ACE inhibitory activity of products prepared by spay drying a...Drying technology of angiotensin converting enzyme （ACE） inhibitory peptides derived from bovine casein was investigated. No significance was observed on ACE inhibitory activity of products prepared by spay drying and freeze drying （P〉0.05）. Spay drying was the best drying process for practical industry production. The inlet temperature ranged from 140℃ to 160℃ and the exit temperature ranged from 70 ℃ to 90 ℃ during the spay drying process. Under the optimal conditions, scale-up of angiotensin converted enzyme inhibitory peptide from 1 L to 10 L and the experiment was successively conducted. Peptide yield was 29% and half inhibitory concentration （IC50） was 0.53 g. L^-1.展开更多
本研究采用表面等离子体共振技术,以血管紧张素转换酶(angiotensin I converting enzyme,ACE)为蛋白配体,分析马氏珠母贝肉蛋白酶解产物(protein hydrolysate of Pinctada martensii,PHPM)超滤组分与配体的结合情况,利用质谱鉴定结合肽...本研究采用表面等离子体共振技术,以血管紧张素转换酶(angiotensin I converting enzyme,ACE)为蛋白配体,分析马氏珠母贝肉蛋白酶解产物(protein hydrolysate of Pinctada martensii,PHPM)超滤组分与配体的结合情况,利用质谱鉴定结合肽段的氨基酸序列后,筛选潜在抑制ACE活性强的肽段进行合成,研究其体外ACE抑制活性、抑制类型及多肽与ACE蛋白的相互作用。结果显示,PHPM分子质量在3 000~5 000 Da的超滤组分与ACE蛋白具有较强的结合信号,在结合物质的肽序列中优选出4种具有潜在活性的ACE抑制肽进行合成,其中多肽SLPWPMKPMNLIE的半数抑制浓度最低,并且通过氢键与ACE蛋白C端结构域的疏水口袋结合。展开更多
基金Supported by Scientific Research Foundation for Young Scholars of Heilongjiang Province of China (QC07C25)The National High Technology Research and Development Program of China (2008AA10Z315)
文摘Drying technology of angiotensin converting enzyme （ACE） inhibitory peptides derived from bovine casein was investigated. No significance was observed on ACE inhibitory activity of products prepared by spay drying and freeze drying （P〉0.05）. Spay drying was the best drying process for practical industry production. The inlet temperature ranged from 140℃ to 160℃ and the exit temperature ranged from 70 ℃ to 90 ℃ during the spay drying process. Under the optimal conditions, scale-up of angiotensin converted enzyme inhibitory peptide from 1 L to 10 L and the experiment was successively conducted. Peptide yield was 29% and half inhibitory concentration （IC50） was 0.53 g. L^-1.
