食品科学 ›› 2011, Vol. 32 ›› Issue (2 ): 244-247.doi: 10.7506/spkx1002-6630-201102057

• 分析检测 • 上一篇    下一篇

细胞转化液γ-氨基丁酸的精制

杨胜远1,陆兆新2 ,* ,别小妹2,吕凤霞2   

  1. 1.韩山师范学院生物系食品与发酵工程研究所,广东 潮州      521041;
    2.南京农业大学食品科技学院,江苏 南京      210095
  • 收稿日期:2010-03-31 修回日期:2010-11-24 出版日期:2011-01-25 发布日期:2011-01-10
  • 通讯作者: 杨胜远 E-mail:yshengyuan2004@yahoo.com.cn
  • 基金资助:

    国家“863”计划项目(2007AA10Z357);广东省自然科学基金项目(8452104101001546);国家星火计划项目(2008GA780032);韩山师范学院科研基金项目

Purification of Gamma-Aminobutyric Acid from the Supernatant after S. salivarius subsp. thermophilus Y-2 Transformation Reaction

YANG Sheng-yuan,LU Zhao-xin,BIE Xiao-mei,LU Feng-xia   

  1. 1. Food and Fermentation Engineering Institute, Department of Biology, Hanshan Normal University, Chaozhou      521041, China;2. College of Food Science and Technology, Nanjing Agricultural University, Nanjing      210095, China
  • Received:2010-03-31 Revised:2010-11-24 Online:2011-01-25 Published:2011-01-10

摘要: 对Streptococcus salivarius subsp. thermophilus Y-2 细胞转化液GABA 的纯化进行探讨,通过等电点沉淀和732 强酸阳离子交换树脂处理。结果表明:GABA 的总回收率达到84.13%;纯化的GABA 的外观为白色粉末状固体,GABA 含量(97.81 ± 0.67)%,灰分(0.449 ± 0.002)%,干燥质量损失率(1.79 ± 0.06)%,铅、砷和汞的含量分别为(0.4093 ± 0.0001)、(0.0511 ± 0.0001)、(0.0950 ± 0.0000)mg/kg,纯化的GABA 质量符合食品添加剂标准。该方法可高效纯化细胞转化液中的GABA。

关键词: 纯化, γ- 氨基丁酸, 生物转化, 唾液链球菌嗜热亚种

Abstract: The concentrated supernatant after S. salivarius subsp. thermophilus Y-2 transformation reaction rich in gammaaminobutyric acid (GABA) was adjusted to pH 3.22 for precipitate L-Glu, followed by injection into 732 type strong acidic cation exchange resin column and elution with 0.15 mol/L NH3·H2O. After freeze-drying, GABA was obtained as a white solid powder, with 84.13% recovery. The powder contained (97.81±0.67)% of GABA, (0.449±0.002)% of ash, and exhibited a dry weight loss of (1.79± 0.06)%, and the contents of Pb, As and Hg in it were (0.4093±0.0001), (0.0511 ± 0.0001) mg/kg and (0.0950 ± 0.0000) mg/kg, respectively. Moreover, its quality was in accordance with relevant food additive standards. Thus, the purification strategy is highly efficient.

Key words: purification, γ-aminobutyric acid, biotransformation, Streptococcus salivarius subsp. thermophilus

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