乳业科学与技术 ›› 2025, Vol. 48 ›› Issue (5): 0-0.

• 基础研究 •    

不同蛋白酶处理对乳蛋白浓缩物溶解度的影响

黎雨婷1,高达2,淦永祥3,张富科3,崔强1,张志清1   

  1. 1. 四川农业大学
    2. 新希望乳业股份有限公司
    3. 四川农业大学食品学院
  • 收稿日期:2025-06-09 修回日期:2025-07-31 出版日期:2025-09-01 发布日期:2025-10-05
  • 通讯作者: 崔强
  • 基金资助:
    四川省科技计划支助-中央引导地方科;四川省自然科学基金

Effect of different protease treatments on the solubility of milk protein concentrates

  • Received:2025-06-09 Revised:2025-07-31 Published:2025-09-01 Online:2025-10-05

摘要: 乳蛋白浓缩物(Milk protein concentrate,MPC)是优质的食品配方原料,但在贮藏过程中MPC溶解度的降低会严重影响其在食品中应用。本文采用外切蛋白酶(Flavourzyme 500MG)、内切蛋白酶(Alcalase 2.4L FG、Formea CTL 300BG、Neutrase 5.0 BG)和同时具有外切和内切活性的蛋白酶(Protamex 1.6、ProteAXH、Protease A 2SD)分别对MPC进行酶解处理,旨在探究不同蛋白酶水解对MPC聚集体和溶解度的影响。结果表明,不同蛋白酶水解提高MPC溶解性的效果不同。所有酶解样品的溶解度都高于对照组(54%),其中内切蛋白酶作用效果最好,Alcalase 2.4L FG、Formea CTL 300BG和Neutrase 5.0 BG最佳条件水解后溶解度分别达到88.93%、91.91%和62.39%。外切蛋白酶(Flavourzyme 500MG)水解效果最差,溶解度最高为59.98%,且水解后出现大量的蛋白沉淀。Protamex 1.6和Flavourzyme 500MG酶解样品的溶解度随酶解时间的延长先增加后减小。

关键词: 浓缩乳蛋白, 蛋白酶, 水解, 聚集体, 溶解性

Abstract: Milk protein concentrate (MPC) are high-quality ingredients for food formulations, but the reduction of MPC solubility during storage can seriously affect their use in food applications. This paper uses exogenous protease (Flavourzyme 500MG), endonoline protease(Alcalase 2.4L FG、Formea CTL 300BG、Neutrase 5.0 BG) and protease with both excis and endogenous activity(Protamex 1.6、ProteAXH、Protease A 2SD) to enzymatically treat MPC respectively, aiming to explore the effects of different protease hydrolysis on MPC aggregates and solubility.The results showed that hydrolysis by different proteases improved MPC solubility differently.The solubility of all enzymatically solubilized samples was higher than that of the control (54%), with the endoprotease acting the best, reaching 88.93%, 91.91% and 62.39% solubility after hydrolysis under optimal conditions for Alcalase 2.4L FG, Formea CTL 300BG and Neutrase 5.0 BG, respectively.The exonuclease (Flavourzyme 500MG) was the least effective in hydrolysis, with a maximum solubility of 59.98% and a large amount of protein precipitation after hydrolysis. The solubility of Protamex 1.6 and Flavourzyme 500MG digested samples firstly increased and then decreased with the prolongation of the digestion time.

Key words: Milk protein concentrate, proteases, hydrolysis, aggregate, solubility