Abstract
A new method for the synthesis of γ-glutamylmethylamide is presented. Glutamic acid γ-methyl ester was used as substrate for γ-glutamylmethylamide synthesis catalyzed by Escherichia coli with γ-glutamyltranspeptidase activity. Reaction conditions were optimized by using 300 mM glutamic acid γ-methyl ester and 3,000 mM methylamine at pH 10 and 40 °C. Bioconversion rate of γ-glutamylmethylamide reached 87 % after 10 h. γ-Glutamyltranspeptidase was reversibly inhibited only when glutamic acid γ-methyl ester was above 300 mM.
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Acknowledgments
This study was supported by the Anhui Province College Excellent Young Talents Fund Project of China “Molecular modification of tryptophan synthetase and chiral catalysis research” (2013SQRL086ZD) and Key project of natural science in Anhui province department of education (KJ2012A264).
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Xu, L., Gao, G., Wengen, C. et al. Enzymatic Synthesis of γ-Glutamylmethylamide from Glutamic Acid γ-Methyl Ester and Methylamine Catalyzed by Escherichia coli Having γ-Glutamyltranspeptidase Activity. Appl Biochem Biotechnol 173, 851–856 (2014). https://doi.org/10.1007/s12010-014-0877-3
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DOI: https://doi.org/10.1007/s12010-014-0877-3