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Overexpression of Neurospora crassa OR74A glutamate decarboxylase in Escherichia coli for efficient GABA production |
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| Authors: | Tam Dinh Le Vo Ji-seun Ko Seung Hwan Lee Si Jae Park Soon Ho Hong |
| Institution: | 1. Department of Chemical Engineering, University of Ulsan, Ulsan, 680-749, Korea 2. Industrial Biochemicals Research Group, Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon, 305-600, Korea 3. Department of Environmental Engineering and Energy, Myongji University, Yongin, 449-728, Korea |
| Abstract: | This study investigated the effect of glutamate decarboxylase from Neurospora crassa OR74A on GABA production in Escherichia coli. GABA is one of the inhibitory neurotransmitters in the mammalian central nervous system, and can be used as a precursor of promising biopolymer Nylon 4. E. coli that overexpressed N. crassa glutamate decarboxylase was cultured at various pH levels and temperatures to determine optimum conditions for GABA production. When the recombinant E. coli strain was cultured at 30°C and pH 3, a final GABA concentration of 5.26 g/L was obtained from 10 g/L of monosodium glutamate (MSG), corresponding to a GABA yield of 86.23%. |
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