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http://dx.doi.org/10.5352/JLS.2007.17.7.970

Isolation and Characterization of Lactobacillus brevis AML15 Producing γ-Aminobutyric acid  

Shin, Ji-Won (School of Bioresources Science, Andong National University)
Kim, Dong-Geol (School of Bioresources Science, Andong National University)
Lee, Yong-Woo (School of Bioresources Science, Andong National University)
Lee, Hyoung-Seok (School of Bioresources Science, Andong National University)
Shin, Kee-Sun (Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology)
Choi, Chung-Sig (Hans Bio Co., B.I. center)
Kwon, Gi-Seok (School of Bioresources Science, Andong National University)
Publication Information
Journal of Life Science / v.17, no.7, 2007 , pp. 970-975 More about this Journal
Abstract
For the screening of ${\gamma}-aminobutyric$ acid (CABA)-producing bacteria, 86 bacterial strains which produce GABA were isolated from Kimchi and Salted fisk .Among these, three strains designated AML15, AML45-1, AML72 with relatively high GABA productivity were selecled by thin layer chromatography (TLC). To elucidate the relationship between isolated strains and the genus Lactobacillus, their 16S rDNA sequence were examined. The result of their DNA sequences showed 99% similarity with Lactobacillus brevis ATCC 367. On the basis of the these results, isolated strains were identified as Lactobacillus brevis and designated L. brevis AML15. In order to determine the optimum conditions for GABA production, the isolated strains were cultivated in pyridoxal phosphate (PLP) and monosodium glutami. acid (MSG). Results showed that L. brevis AML15 had the highest CABA productivity with 10,424 $nM/{\mu}l$ concentration in MRS broth containing 5% (w/v) MSG and 10 ${\mu}M$ PLP at pH 5.0. The results imply that L. brevis AML15 has the potential to be developed as a strain for GABA hyper-production.
Keywords
${\gamma}-Aminobutyric$ acid; Glutamate decarboxylase; Lactobacillus brevis;
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