水解物
二肽基肽酶
IC50型
水解
乳清蛋白
化学
骆驼奶
肽
胰蛋白酶
酶
生物化学
色谱法
食品科学
体外
作者
Alice B. Nongonierma,Cloé Cadamuro,Aurélien Le Gouic,Priti Mudgil,Sajid Maqsood,Richard J. FitzGerald
标识
DOI:10.1016/j.foodchem.2018.11.142
摘要
Camel milk proteins contain dipeptidyl peptidase IV (DPP-IV) inhibitory peptides. A camel whey protein concentrate (WPC, 44.7 ± 3.4% (w/w) protein) was prepared and subsequently hydrolysed with trypsin at different temperatures, enzyme to substrate (E:S) ratios and hydrolysis times yielding fifteen hydrolysates (H1-H15). Their DPP-IV half maximal inhibitory concentrations (IC50) ranged from 0.55 ± 0.05 to 1.52 ± 0.16 mg L-1 for H8 and H6, respectively. E:S was the only factor having a significant effect on the DPP-IV IC50 value (p < 0.05). Relatively potent α-lactalbumin-derived DPP-IV inhibitory peptides (LAHKPL and ILDKEGIDY) were detected in selected hydrolysates. Additionally, three potent β-CN-derived peptides, VPV, YPI and VPF having DPP-IV IC50 values of 6.6 ± 0.5, 35.0 ± 2.0 and 55.1 ± 5.8 µM, respectively, were identified. After IPI, VPV is the second most potent DPP-IV inhibitory peptide identified to date, which supports the role of camel milk as an antidiabetic agent.
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