食品科学 ›› 2011, Vol. 32 ›› Issue (12): 57-59.doi: 10.7506/spkx1002-6630-201112013

• 工艺技术 • 上一篇    下一篇

半乳糖基-β-环糊精的合成与结构研究

沈汪洋,金征宇   

  1. 1.武汉工业学院食品科学与工程学院 2.江南大学食品科学与工程学院
  • 出版日期:2011-06-25 发布日期:2011-06-10
  • 基金资助:
    武汉工业学院引进人才科研启动项目(2010RZ20);武汉工业学院校立科研计划项目(2009Q01)

Enzymatic Synthesis and Identification of Galactosyl-β-cyclodextrin

SHEN Wang-yang1,JIN Zheng-yu2   

  1. 1. School of Food Science and Technology, Wuhan Polytechnic University, Wuhan 430023, China; 2. School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
  • Online:2011-06-25 Published:2011-06-10

摘要: 以β-环糊精和蜜二糖为原料,通过α-半乳糖苷酶酶法合成得到半乳糖基-β-环糊精(Gal-β-CD)。酶法合成条件为:蜜二糖中酶用量为20U/g,β-环糊精和蜜二糖的物质的量比为1:2,pH6.5(50mmol/L醋酸缓冲液),反应时间24h,反应温度40℃。经过高效液相色谱分离产物,通过质谱、红外光谱和核磁共振证明该产物为6-O-α-D-半乳糖基-β-环糊精。

关键词: β-环糊精, 半乳糖基-β-环糊精, 蜜二糖, α-半乳糖苷酶

Abstract: Galactosyl-β-cyclodextrin (Gal-β-CD) was synthesized under the catalysis of α-D-galactosidase derived from germinated coffee beans using melibiose as a donor and β-cyclodextrin as an acceptor. The optimum synthesis parameters were enzyme dose 20 U/g melibiose, β-CD-to-melibiose molar ratio 1:2, pH 6.5 (50 mmol/L acetate buffer), reaction time 24 h and reaction temperature 40 ℃, respectively. The product obtained under the optimized conditions was purified by preparative HPLC, and the purified product was 6-O-α-D-galactosyl-β- cyclodextrin according to ESI-MS, IR, and NMR analyses.

Key words: galactosyl-β-cyclodextrin, β-cyclodextrin, melibiose, α-D-galactosidase

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