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Enzymatic conversion for γ-aminobutyric acid by Lactococcus lactis

Yuanxin Fu, Tao Zhang, Bo Jiang, Wanmeng Mu

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Abstract

γ-aminobutyric acid was prepared by L-Glutamate decarboxylase from Lactococcus lactis 1.009.The influence of cell concentration,buffer system,cell age,reaction time and external PLP concentration were studied.The optimum reaction system was 0.2mol/L HAc-NaAc buffer pH4.7,containing 10g/L lactic acid bacteria and 0.1mmol/L pyridoxal phosphate(PLP).Glutamate was added each 10h,after 60h GABA content was 19.1g/L,the conversion of L-Glutamate was 99.9%.

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What this paper is about

γ-aminobutyric acid was prepared by L-Glutamate decarboxylase from Lactococcus lactis 1.009.The influence of cell concentration,buffer system,cell age,reaction time and external PLP concentration were studied.The optimum reaction system was 0.2mol/L HAc-NaAc buffer pH4.7,containing 10g/L lactic acid bacteria and 0.1mmol/L pyridoxal phosphate(PLP).Glutamate was added each 10h,after 60h GABA content was 19.1g/L,the conversion of L-Glutamate was 99.9%.

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Available abstract

γ-aminobutyric acid was prepared by L-Glutamate decarboxylase from Lactococcus lactis 1.009.The influence of cell concentration,buffer system,cell age,reaction time and external PLP concentration were studied.The optimum reaction system was 0.2mol/L HAc-NaAc buffer pH4.7,containing 10g/L lactic acid bacteria and 0.1mmol/L pyridoxal phosphate(PLP).Glutamate was added each 10h,after 60h GABA content was 19.1g/L,the conversion of L-Glutamate was 99.9%.

Key concepts: Lactococcus lactis, Glutamate decarboxylase, Lactic acid, Aminobutyric acid, Chemistry, Pyridoxal, Bacteria, Enzyme

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