食品科学 ›› 2007, Vol. 28 ›› Issue (12): 350-354.

• 生物工程 • 上一篇    下一篇

pH吸附法纯化戊糖乳杆菌素31-1的研究

 张金兰, 程万鹏, 畅晓渊, 高岩, 李平兰   

  1. 中国农业大学食品科学与营养工程学院; 中国农业大学食品科学与营养工程学院 北京100083; 北京100083山西农业大学食品科学与工程学院; 山西太谷030801; 北京100083;
  • 出版日期:2007-12-15 发布日期:2011-11-22

Study on Purification of Pentocin 31-1 by pH-adsorption

 ZHANG  Jin-Lan, CHENG  Wan-Peng, CHANG  Xiao-Yuan, GAO  Yan, LI  Ping-Lan   

  1. 1.College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; 2.College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
  • Online:2007-12-15 Published:2011-11-22

摘要: 戊糖乳杆菌素31-1,由分离自宣威火腿的戊糖乳杆菌31-1产生,随pH的改变可以选择性的吸附于产生菌细胞表面,pH5.0时吸附率达75%,而在pH3.0以下,7.0以上吸附率为0。基于以上规律,通过调整pH值,戊糖乳杆菌素31-1在pH5.0吸附、pH7.0释放于产生菌细胞,达到了较好的分离纯化效果,戊糖乳杆菌素31-1回收率为45%,纯化倍数为33。经Tricine-SDS-PAGE进行分子量的估测及纯度鉴定,证实戊糖乳杆菌素31-1的分子量在6400~14000D之间。该纯化方法简便、高效,具有工业生产的潜力。

关键词: 细菌素, 吸附-解吸, 纯化, Tricine-SDS-PAGE

Abstract: Pentocin 31-1, produced by Lactobacillus pentosus 31-1 isolated from the traditional China fermented Xuan-Wei Ham, coud be adsorbed selectively on its producer at different pH conditions. At pH5.0, the adsorption rate was 75%, while below pH 3.0 or above pH7.0, Pentocin 31-1 wasn’t adsorbed at all. On the basis of this property, by changing pH, Pentocin 31-1 was adsorbed at pH5.0 and released at pH7.0. The efficiency of isolation and purification was high. The specific activity of Pentocin 31-1was increased 33 fold with a yield of 45%. The active extract was further subjected to Tricine-SDS-PAGE. The result showed that two bands appeared, where most of the activity corresponded to the band with molecular weight between 6400~ 14000 D. It is simple and effective, could be used as commercial preparations for food industry.

Key words: bacteriocin, adsorption-desorption, purification, Tricine-SDS-PAGE