食品科学 ›› 2009, Vol. 30 ›› Issue (18 ): 159-162.doi: 10.7506/spkx1002-6300-200918033

• 工艺技术 • 上一篇    下一篇

双水相萃取法分离低温α- 淀粉酶的研究

房耀维1,刘 姝1,吕明生1,徐炜枫2,王淑军1 ,* ,陈 丽1,焦豫良1   

  1. 1.淮海工学院海洋学院,江苏省海洋生物技术重点实验室 2.江苏省农产品质检中心
  • 收稿日期:2009-06-27 出版日期:2009-09-15 发布日期:2010-12-29
  • 通讯作者: 王淑军 E-mail:shujunwang@163.com
  • 基金资助:

    连云港市科技局资助项目(CG0714)

Aqueous Two-phase Extraction of Cold-adapted α-Amylase from Fermentation Culture Supernatant of Pseudoalteromonas arctic GS230

FANG Yao-wei1,LIU Shu1,LU Ming-sheng1,XU Wei-feng2,WANG Shu-jun1,*, CHEN Li1,JIAO Yu-liang   

  1. 1. Jiangsu Key Laboratory of Marine Biotechnology, School of Marine Science and Technology, Huaihai Institute of Technology,
    Lianyungang 222005, China ;2. Jiangsu Agro-product Quality Text Center, Nanjing 210036, China
  • Received:2009-06-27 Online:2009-09-15 Published:2010-12-29
  • Contact: WANG Shu-jun E-mail:shujunwang@163.com

摘要:

对利用聚乙二醇(polyethylene glycol,PEG)- 磷酸盐双水相体系从Pseudoalteromonas arctic GS230 发酵液中直接萃取分离低温α- 淀粉酶进行研究。探讨PEG 分子量、相浓度、pH 值对低温α- 淀粉酶在PEG- 磷酸盐双水相中分配系数、纯化系数及回收率的影响,并进行直线放大实验。结果表明:在pH5.0,PEG-1000 15%- 磷酸盐15% 的双水相体系中,低温α- 淀粉酶的纯化系数及回收率分别为4.8 和87%。

关键词: 双水相体系, 分离, 低温α- 淀粉酶

Abstract:

An aqueous two-phase system consisting of polyethylene glycol and phosphate was applied to extract cold-adapted α -amylase from fermentation culture supernatant of Pseudoalteromonas arctic GS230. The effects of phase composition, molecular weight of PEG and pH on enzyme partitioning and selective enrichment were studied, and the extraction procedure established was verified by linear scale-up experiments. A maximum purification fold of 4.8 and enzyme activity recovery of 87% were obtained when an aqueous 15% PEG-15% phosphate system at pH 5.0 was used for the extraction.

Key words: aqueous two-phase system (ATPS), extraction, cold-adapted α-amylase

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