天然产物研究与开发 ›› 2015, Vol. 27 ›› Issue (8): 1436-1440.doi: 10.16333/j.1001-6880.2015.08.023

• 开发研究 • 上一篇    下一篇

丝素肽的制备及其抗氧化活性研究

谷平平1,李琳琳2,娄小平1*,金歌1   

  1. 1 郑州大学第一附属医院,郑州 450000;2 许昌陶瓷职业学院,禹州 461670
  • 出版日期:2015-08-29 发布日期:2015-09-01

Preparation of Silk Fibroin Peptide and Its Antioxidant Activity

GU Ping-ping1, LI Lin-lin2, LOU Xiao-ping1*, JIN Ge1   

  1. 1 The First Affiliated Hospital of Zhengzhou University,Zhengzhou 450000,China;2 Xuchang Ceramics College,Yuzhou 461670,China
  • Online:2015-08-29 Published:2015-09-01

摘要: 本文以废蚕丝为原料,通过脱胶精炼、碱性蛋白酶Alcalase2.4降解后得到丝素肽溶液,并采用超氧自由基(O2·-)体系、羟基自由基(·OH)体系、二苯代苦味酰基自由基(DPPH·)体系考察了不同水解度丝素肽体外清除自由基的活性。结果表明,丝素蛋白溶液在底物浓度5%,加酶量([E]/[S])2%,反应温度60 ℃,pH值8.5时,通过控制反应时间可获得水解度为0~23.92%的丝素肽,在此范围内丝素肽清除自由基的能力随水解度的提高而不断增强,在水解度为23.92%时,丝素肽对超氧自由基(O2·-)的清除率达73.69%,对羟基自由基(·OH)的清除率为82.49%,对二苯代苦味酰基(DPPH·)的清除率为70.79%,抗氧化活性最好。

关键词: 丝素蛋白, 丝素肽, 酶解, 抗氧化活性

Abstract: Waste silk was used as raw material in this study.Fibroin peptide were prepared by degummed and hydrolyzed of Alcalase2.4L.In addition,superoxide anion free radical (O2·-),hydroxyl free radical (·OH) and DPPH free radical (DPPH·) assays were used to evaluate free radical scavenging activities of fibroin peptides.The results showed that fibroin peptides with DH value 0-23.92% can be obtained by controlling the reaction time under the following conditions:substrate concentration of 5%,enzyme dosage ([E]/[S]) of 2%,temperature of 60 ℃,pH 8.5.As the hydrolysis degree increased,scavenging rate of silk fibroin peptide was continuously enhanced in the range of DH.The silk fibroin had the highest antioxidant activity when the DH was 23.92%.The scavenging rates of silk fibroin peptide with DH 23.92% on O2·-,·OH and DPPH· were 73.69%,82.49% and 70.79%,respectively.

Key words: silk protein, silk fibroin peptide, antioxidant activity, enzymatic hydrolysis

中图分类号: 

Q51