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Position: Home > Articles > Enzymatic Synthesis of α-Galactosyl-β-cyclodextrin by α-galactosidase Hubei Agricultural Sciences 2011,50 (19) 4041-4043

α-半乳糖苷酶法合成α-半乳糖基-β-环糊精的研究

作  者:
沈汪洋;金征宇;高虹
单  位:
武汉工业学院食品科学与工程学院;江南大学食品科学与工程学院;湖北省农业科学院农产品加工与核农技术研究所
关键词:
α-半乳糖苷酶;酶法合成;α-半乳糖基-β-环糊精
摘  要:
应用发芽咖啡豆α-半乳糖苷酶法合成α-半乳糖基-β-环糊精,研究其合成工艺。通过Box-Behnken设计等方法,得出工艺条件为α-半乳糖苷酶用量73 nkat,时间28 h,pH 6.3,温度40℃,振荡速度75 r/min,反应体系包括2 mL醋酸缓冲液(50 mmol/L),β-环糊精0.4 mol/L,蜜二糖0.8 mol/L。在此条件下,α-半乳糖基-β-环糊精绝对产率为28.4%,比优化前提高了41.3%。
译  名:
Enzymatic Synthesis of α-Galactosyl-β-cyclodextrin by α-galactosidase
作  者:
SHEN Wang-yang1,JIN Zheng-yu2,GAO Hong3(1.School of Food Science and Technology,Wuhan Polytechnic University,Wuhan 430023,China;2.School of Food Science and Technology,Jiangnan University,Wuxi 214122,Jiangsu,China;3 Research Institute of Agricultural Products Processing and Nuclear-agricultural Technology,Hubei Academy of Agricultural Sciences,Wuhan 430064,China)
关键词:
α-galactosidase;enzymatic synthesis;α-galactosyl-β-cyclodextrin
摘  要:
Parameters affecting the synthesis of α-galactosyl-β-cyclodextrin by α-galactosidase of germinating coffee beans were systematically studied by Box-Behnken design.The optimized conditions were as follows,enzyme concentration,73 nkat;Reaction time,28 h;pH,6.3;Reaction temperature,40 ℃;Oscillatory speed,75 r/min;β-cyclodextrin,0.4 mol/L;melibiose,0.8mol/L;and acetate buffer(50 mmol/L),2 mL,The yield of α-galactosyl-β-cyclodextrin was 28.4% under these conditions,which was 41.3% higher than conditions before optimization.

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