Enzymatic synthesis of β-N-(γ-l(+)-glutamyl)-4-carboxyphenylhydrazine with Escherichia coli γ-glutamyltransferase
作者:Hongjuan Zhang、Junzhong Liu、Yueping Zhan、Junjun Chang、Lisheng Xu、Zhiyuan Wang、Qian Liu、Qingcai Jiao
DOI:10.1016/j.molcatb.2013.01.023
日期:2013.6
A new method for the synthesis of beta-N-(gamma-L(+)-glutamyl)-4-carboxyphenylhydrazine, a precursor of agaritine, is presented. This compound was prepared from L-glutamine and 4-hydrazinobenzoic acid through the transpeptidation reaction catalyzed by the Escherichia coli gamma-glutamyltransferase. The optimum reaction conditions for the production of beta-N-(gamma-L(+)-glutamyl)-4-carboxyphenylhydrazine were 50 mM L-glutamine, 500 mM 4-hydrazinobenzoic acid and 40 U gamma-glutamyltransferase/mL at pH 8 and 37 degrees C for 24 h. The product was obtained with a conversion rate of 90% (mol/mol). gamma-Glutamyltransferase activity was not inhibited by 4-hydrazinobenzoic acid at concentrations up to 1000 mM. This simple and efficient method would facilitate the synthesis of glutamyl phenylhydrazine analogs, including agaritine. (C) 2013 Elsevier B.V. All rights reserved.