Open AccessImprovement of chicken plasma protein hydrolysate angiotensin I‐converting enzyme inhibitory activity by optimizing plastein reaction
Author(s) -
Gao Dandan,
Guo Penghui,
Cao Xin,
Ge Lili,
Ma Hongxin,
Cheng Hao,
Ke Yiqiang,
Chen Shien,
Ding Gongtao,
Feng Ruofei,
Qiao Zilin,
Bai Jialin,
Nordin Nurul I.,
Ma Zhongren
Publication year - 2020
Publication title -
food science and nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 27
ISSN - 2048-7177
DOI - 10.1002/fsn3.1572
Subject(s) - hydrolysate , chemistry , trypsin , papain , leucine , hydrolysis , valine , chromatography , enzyme , histidine , amino acid , biochemistry
Abstract Chicken plasma protein hydrolysate (CPPH) was prepared by trypsin with angiotensin I‐converting enzyme (ACE) inhibitory activity of 53.5% ± 0.14% and the degree of hydrolysis (DH) of 16.22% ± 0.21% at 1 mg·ml −1 ; then, five proteases, including pepsin, trypsin, papain, alcalase, and neutrase, were employed to improve ACE inhibitory ability by catalyzing plastein reaction. The results indicated that trypsin‐catalyzed plastein reaction showed the highest ACE inhibitory activity. The exogenous amino acids of leucine, histidine, tyrosine, valine, and cysteine were selected to modify the CPPH. The leucine‐modified plastein reaction released the highest ACE inhibitory activity. The effects of four reaction parameters on plastein reaction were studied, and the optimal conditions with the purpose of obtaining the most powerful ACE inhibitory peptides from modified products were obtained by response surface methodology (RSM). The maximum ACE inhibition rate of the modified hydrolysate reached 82.07% ± 0.03% prepared at concentration of hydrolysates of 30%, reaction time of 4.9 hr, pH value of 8.0, temperature of 40°C, and E/S ratio of 5,681.62 U·g −1 . The results indicated that trypsin‐catalyzed plastein reaction increased ACE inhibitory activity of chicken plasma protein hydrolysates by 28.57%.