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Enzymatic Synthesis of Theanine with L-Glutamlhydrine as Substrate
Author(s): ZHANG Fei, XIONG Ji-bin, LIU Jun-zhong, ZHAO Gen-hai, JIAO Qing-cai
Pages: 130-
132,141
Year: 2010
Issue:
2
Journal: Fine Chemicals
Keyword: L-glutamlhydrine; theanine; γ-glutamyltranspeptidase; enzymatic synthesis; biological engineering;
Abstract: 采用一种廉价的底物L-谷氨酰肼代替L-谷氨酰胺,成功地合成了茶氨酸,并且对该酶促反应的条件进行了初步优化.结果表明,以L-谷氨酰肼为底物时,γ-谷氨酰转肽酶(GGT)活性约是以L-谷氨酰胺为底物时的78.3%.该酶促反应的最适条件为:pH=10,反应温度40 ℃,n(L-谷氨酰肼)∶ n(乙胺)=1∶ 10,L-谷氨酰肼初始浓度0.3 mol/L.利用以上条件进行了茶氨酸的小量制备,投料L-谷氨酰...
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