响应面法优化酶法制备驴血红蛋白源二肽基肽酶Ⅳ抑制活性肽
2021-05-17刘丹吴晓彤
刘丹 吴晓彤



摘 要:食源性二肽基肽酶Ⅳ(dipeptidyl peptidase Ⅳ,DPP-Ⅳ)抑制活性肽成为近年来健康产品研究的方向之一。本研究以驴血红蛋白为原料,采用计算机模拟蛋白水解方法筛选最佳蛋白酶,研究酶解时间、温度和加酶量对蛋白水解度(degree of hydrolysis,DH)和酶解产物DPP-Ⅳ抑制率的影响,响应面优化酶解法制备DPP-Ⅳ抑制活性肽的工艺条件。结果表明,最佳蛋白酶为蛋白酶K,驴血红蛋白源制备DPP-Ⅳ抑制活性肽的最佳酶解条件为:底物质量浓度1 g/100 mL、酶解时间3.15 h、温度65 ℃、pH 8、加酶量400 U/g,此条件下2 mg/mL酶解产物对DPP-Ⅳ的抑制率为53.44%。
关键词:驴血红蛋白;蛋白酶K;响应面分析法;二肽基肽酶Ⅳ抑制活性肽
Optimization of Enzymatic Preparation of Dipeptidyl Peptidase-Ⅳ Inhibitory Peptides from Donkey Hemoglobin
LIU Dan, WU Xiaotong*
(School of Life Sciences, Inner Mongolia University, Hohhot 010000, China)
Abstract: Food-derived dipeptidyl peptidase (DPP) Ⅳ inhibitory peptide has become an important direction of research on dietary supplements in recent years. In this study, donkey hemoglobin was hydrolyzed with proteases to produce DPP-Ⅳ inhibitory peptide. The best protease was selected by computer simulation of protein hydrolysis. The effects of hydrolysis time, temperature and enzyme dosage on the degree of hydrolysis and DPP-Ⅳ inhibitory activity were studied. The process conditions were optimized by response surface methodology. The results showed that protease K was the best enzyme for the production of DPP-Ⅳ inhibitory peptide. The optimal enzymatic hydrolysis conditions were as follows: substrate concentration 1%, hydrolysis time 3.15 h, temperature 65 ℃, pH 8.00, and enzyme dosage 400 U/g. The inhibition rate of DPP-Ⅳ by 2 mg/mL of the hydrolysate prepared using these conditions was 53.44%.
Keywords: donkey hemoglobin; protease K; response surface analysis; dipeptidyl peptidase Ⅳ inhibitory peptides
DOI:10.7506/rlyj1001-8123-20201225-296
中圖分类号:TS251.9 文献标志码:A 文章编号:1001-8123(2021)02-0019-06
引文格式:
刘丹, 吴晓彤. 响应面法优化酶法制备驴血红蛋白源二肽基肽酶-Ⅳ抑制活性肽[J]. 肉类研究, 2021, 35(2): 19-24. DOI:10.7506/rlyj1001-8123-20201225-296. http://www.rlyj.net.cn
LIU Dan, WU Xiaotong. Optimization of enzymatic preparation of dipeptidyl peptidase-Ⅳ inhibitory peptides from donkey hemoglobin[J]. Meat Research, 2021, 35(2): 19-24. DOI:10.7506/rlyj1001-8123-20201225-296. http://www.rlyj.net.cn
随着社会经济的飞速发展,人们的生活方式特别是饮食习惯发生巨大变化,营养摄入的不均衡导致肥胖和糖尿病等慢性代谢疾病的发生率逐年上升。糖尿病已逐渐成为世界范围内日益严重的社会健康问题,预计到2040年,将会有6.42亿成年人患糖尿病[1]。
二肽基肽酶Ⅳ(dipeptidyl peptidase Ⅳ,DPP-Ⅳ)抑制剂是新型糖尿病治疗药物[2]。然而,长期服用合成的DPP-Ⅳ抑制剂会产生耐药性和肝肾损伤等副作用[3]。生物活性肽是对生物机体生命活动有益或是具有生理作用的肽类化合物,是一类分子质量小于6 000 Da,具有多种生物学功能的多肽[4],其分子结构复杂程度不一,介于氨基酸与蛋白质之间,由2 个至数十个氨基酸通过肽键连接而成[5]。DPP-Ⅳ抑制活性肽主要来源于天然动植物,具有生物活性高、副作用低等优点,在高效性和安全性等方面具有突出优势[6],具有辅助控制血糖水平的潜力[7]。……
