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双酶法催化玉米淀粉制备γ-CD
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γ-CD Catalyzed from Maize Starch by Dual Enzymatic Reaction
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DOI:10.3969/j.issn.1673-1689.2017.04.004
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中文关键词: 4α-糖基转移酶 环糊精葡萄糖基转移酶 γ-环糊精 玉米淀粉
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英文关键词: 4α-glycosyltransferase,cyclodextrin glycosyltransferase,γ-cyclodextrin,maize starch
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中文摘要:
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以玉米淀粉为底物,研究了来自于栖热水生菌的4α-糖基转移酶(4αGTase)和来自于嗜碱芽孢杆菌的环糊精葡萄糖基转移酶(CGTase)作用于淀粉制备γ-CD的影响因素。结果表明:两种酶的添加方式为先加入4αGTase、再加入CGTase;γ-CD的最佳制备条件为底物质量分数5%,4αGTase加酶量4 U/g淀粉,CGTase加酶量8U/g淀粉,反应时间30 h。在此条件下γ-CD的得率最高为12.83%,比对照组提高了76.7%。
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英文摘要:
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Theconjunction of 4α-glycosyltransferase(4αGTase) with cyclodextrin glycosyltransferase(CGTase) were screened for their ability ofproducing γ-cyclodextrin(CD) usingmaize starch as substrate. The studies on the influence factors showed that 4αGTase should be added first,followed byCGTase. The optimal conditions for γ-CD production was as following:4U of 4αGTase and 8U ofCGTase per gram of substratewere used to convert maize starch(5%,w/v) into γ-CD with the reaction time of 30 h. the subsequent yield of γ-CD was 12.83%,which was 76.7% higher than the control. This study has potential value for the industrial production of γ-CD.
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