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The two-step biotransformation of monosodium glutamate to GABA by Lactobacillus brevis growing and resting cells

Gama-aminobutyric acid (GABA) is a natural functional amino acid. In the current study, Lactobacillus brevis TCCC13007, a high GABA-producing strain, was isolated from naturally pickled Chinese vegetables. A two-step cellular bioconversion process was established using L. brevis TCCC13007 for the pr... Full description

Journal Title: Applied Microbiology and Biotechnology 2012, Vol.94(6), pp.1619-1627
Main Author: Zhang, Ying
Other Authors: Song, Lei , Gao, Qiang , Yu, Shao , Li, Lei , Gao, Nian
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0175-7598 ; E-ISSN: 1432-0614 ; DOI: 10.1007/s00253-012-3868-8
Link: http://dx.doi.org/10.1007/s00253-012-3868-8
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recordid: springer_jour10.1007/s00253-012-3868-8
title: The two-step biotransformation of monosodium glutamate to GABA by Lactobacillus brevis growing and resting cells
format: Article
creator:
  • Zhang, Ying
  • Song, Lei
  • Gao, Qiang
  • Yu, Shao
  • Li, Lei
  • Gao, Nian
subjects:
  • Gama-aminobutyric acid (GABA)
  • Lactobacillus brevis
  • Glutamate
  • Biotransformation
  • Kinetic model
ispartof: Applied Microbiology and Biotechnology, 2012, Vol.94(6), pp.1619-1627
description: Gama-aminobutyric acid (GABA) is a natural functional amino acid. In the current study, Lactobacillus brevis TCCC13007, a high GABA-producing strain, was isolated from naturally pickled Chinese vegetables. A two-step cellular bioconversion process was established using L. brevis TCCC13007 for the production of GABA. First, L. brevis cells were grown anaerobically in 7% monosodium glutamate (MSG)-containing medium at an initial pH of 6.0 and a controlled pH of 4.6 for 16 to 66 h; approximately 38 g L −1 of GABA was obtained after 66 h of fermentation at a conversion rate of 98.6%. In the second stage of the process, about 7.6 g L −1 of GABA was produced three more times at a conversion rate of 92.2% using the same batch of resting cells in the substrate-containing buffer under optimized conditions. Thus, the total GABA yield reached 61 g L −1 . A model system for the biotransformation of MSG to GABA was established using L. brevis TCCC13007 resting cells. The reaction rates were found to follow the classic Michaelis–Menten equation at low substrate concentrations (
language: eng
source:
identifier: ISSN: 0175-7598 ; E-ISSN: 1432-0614 ; DOI: 10.1007/s00253-012-3868-8
fulltext: fulltext
issn:
  • 1432-0614
  • 14320614
  • 0175-7598
  • 01757598
url: Link


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titleThe two-step biotransformation of monosodium glutamate to GABA by Lactobacillus brevis growing and resting cells
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subjectGama-aminobutyric acid (GABA) ; Lactobacillus brevis ; Glutamate ; Biotransformation ; Kinetic model
descriptionGama-aminobutyric acid (GABA) is a natural functional amino acid. In the current study, Lactobacillus brevis TCCC13007, a high GABA-producing strain, was isolated from naturally pickled Chinese vegetables. A two-step cellular bioconversion process was established using L. brevis TCCC13007 for the production of GABA. First, L. brevis cells were grown anaerobically in 7% monosodium glutamate (MSG)-containing medium at an initial pH of 6.0 and a controlled pH of 4.6 for 16 to 66 h; approximately 38 g L −1 of GABA was obtained after 66 h of fermentation at a conversion rate of 98.6%. In the second stage of the process, about 7.6 g L −1 of GABA was produced three more times at a conversion rate of 92.2% using the same batch of resting cells in the substrate-containing buffer under optimized conditions. Thus, the total GABA yield reached 61 g L −1 . A model system for the biotransformation of MSG to GABA was established using L. brevis TCCC13007 resting cells. The reaction rates were found to follow the classic Michaelis–Menten equation at low substrate concentrations (<80 mM). Kinetic analysis of the biotransformation revealed that L. brevis TCCC13007 resting cells produced GABA similar to that produced by purified glutamate decarboxylase from L. brevis .
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titleThe two-step biotransformation of monosodium glutamate to GABA by Lactobacillus brevis growing and resting cells
descriptionGama-aminobutyric acid (GABA) is a natural functional amino acid. In the current study, Lactobacillus brevis TCCC13007, a high GABA-producing strain, was isolated from naturally pickled Chinese vegetables. A two-step cellular bioconversion process was established using L. brevis TCCC13007 for the production of GABA. First, L. brevis cells were grown anaerobically in 7% monosodium glutamate (MSG)-containing medium at an initial pH of 6.0 and a controlled pH of 4.6 for 16 to 66 h; approximately 38 g L −1 of GABA was obtained after 66 h of fermentation at a conversion rate of 98.6%. In the second stage of the process, about 7.6 g L −1 of GABA was produced three more times at a conversion rate of 92.2% using the same batch of resting cells in the substrate-containing buffer under optimized conditions. Thus, the total GABA yield reached 61 g L −1 . A model system for the biotransformation of MSG to GABA was established using L. brevis TCCC13007 resting cells. The reaction rates were found to follow the classic Michaelis–Menten equation at low substrate concentrations (<80 mM). Kinetic analysis of the biotransformation revealed that L. brevis TCCC13007 resting cells produced GABA similar to that produced by purified glutamate decarboxylase from L. brevis .
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abstractGama-aminobutyric acid (GABA) is a natural functional amino acid. In the current study, Lactobacillus brevis TCCC13007, a high GABA-producing strain, was isolated from naturally pickled Chinese vegetables. A two-step cellular bioconversion process was established using L. brevis TCCC13007 for the production of GABA. First, L. brevis cells were grown anaerobically in 7% monosodium glutamate (MSG)-containing medium at an initial pH of 6.0 and a controlled pH of 4.6 for 16 to 66 h; approximately 38 g L −1 of GABA was obtained after 66 h of fermentation at a conversion rate of 98.6%. In the second stage of the process, about 7.6 g L −1 of GABA was produced three more times at a conversion rate of 92.2% using the same batch of resting cells in the substrate-containing buffer under optimized conditions. Thus, the total GABA yield reached 61 g L −1 . A model system for the biotransformation of MSG to GABA was established using L. brevis TCCC13007 resting cells. The reaction rates were found to follow the classic Michaelis–Menten equation at low substrate concentrations (<80 mM). Kinetic analysis of the biotransformation revealed that L. brevis TCCC13007 resting cells produced GABA similar to that produced by purified glutamate decarboxylase from L. brevis .
copBerlin/Heidelberg
pubSpringer-Verlag
doi10.1007/s00253-012-3868-8
pages1619-1627
date2012-06