• 제목/요약/키워드: $\gamma$-aminobutyric acid (GABA)

검색결과 308건 처리시간 0.024초

글루탐산 용액 처리에 따른 발아현미 중의 감마-아미노낙산 및 일부 아미노산 함량변화 (Changes in the Levels of $\gamma$-Aminobutyric Acid and Some Amino Acids by Application of a Glutamic Acid Solution for the Germination of Brown Rices)

  • 오석흥;김수화;문연정;최원규
    • KSBB Journal
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    • 제17권1호
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    • pp.49-53
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    • 2002
  • GABA가 고함유된 발아현미를 생산할 수 있는 전략을 마련하고자 현미발아시 통상적인 물발아구 외에 젖산발아구, glutamic acid발아구로 나누어 발아 이전의 현미와 GABA 및 일부 유리아미노산 함량을 비교분석하였다. 5 mM glutamic acid 용액을 발아에 사용한 경우 가장 높은 GABA 함량 증진을 보여 시료 g당 및 시료 추출물 중의 단백질 mg당 증가정도가 발아하지 않은 현미에 비해 각각 8배와 12배로 나타났다. 또한 glutamic acid 발아구는 물발아나 젖산발아시 현저히 감소되던 serine의 함량을 오히려 증진시켰다. 모든 발아구에서 GABA 및 alanine 함량이 증진된 것과 는 반대로 glutamic acid와 aspartic acid 함량은 현저히 감소 하였다. 이는 발아 과정에 의해 glutamic acid는 GABA로 aspartic acid는 alanine으로 전환된 것에 기인된 것이라 여겨진다. 이상의 결과를 종합하면 현미발아시 glutamic acid액을 사용하면 기능성 물질인 GABA 함량을 현저히 증진시키며, serine의 감소를 막을 수 있어 기능성이 보강된 발아현미를 얻을 수 있을 것으로 기대된다.

오미자박과 미강 첨가배지가 느타리버섯 자실체의 γ-aminobutyric acid(GABA) 함량에 미치는 효과 (Effect of schizandra berry dregs and rice bran treatment on γ-aminobutyric acid (GABA) content enhancement in Pleurotus ostreatus)

  • 정윤경;김정한;백일선;강영주;지정현
    • 한국버섯학회지
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    • 제15권2호
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    • pp.88-93
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    • 2017
  • 느타리버섯(Pleurotus ostreatus)'흑타리'의 기본배지 조성에 농산물 부산물 유래 첨가용 배지를 추가하였을 경우 기억력 증진물질 중인 하나인 GABA(Gamma-amino butyric acid)함량을 증가시킬 수 있는 배지재료와 첨가수준을 구명한 결과는 다음과 같다. '흑타리'는 5% 녹차가루 처리에서 발이율과 수량이 현저히 떨어졌고, 다시마가루는 첨가된 전체 처리구에서 생육이 불량하였으며, 10% 녹차박과 오미자박 처리구에서는 생육이 가장 양호하였으나 녹차박 처리구보다는 오미자박 처리구에서 기능성물질 함량이 더 우수한 것으로 분석되었다. 또한, 첨가 수준에 따른 자실체의 GABA 함량은 무처리 대비 녹차가루는 2%, 녹차박은 10%, 다시마가루는 1% 정도 증가되었으나, 오미자박은 5%, 10%, 15%, 미강은 1%처리구에서 1.2~2.1배 수준까지 증가되는 양상을 보였다. 결론적으로, 느타리버섯 '흑타리'의 발이율과 생육 뿐만 아니라 GABA 함량 증가를 고려한 적합 첨가 배지로는 오미자박과 미강처리시 가장 양호했으며, 자실체 GABA 함량은 오미자박 10% 처리구에서 2.1배, 미강 1% 처리구에서 12%정도가 증가됨을 알 수 있었다.

무산소 처리에 의한 감마아미노뷰티르산(γ-Aminobutyric Acid) 함량이 높은 뽕잎차의 제조 (Development of Mulberry-leaf Tea Containing γ-Aminobutyric Acid (GABA) by Anaerobic Treatments)

  • 이선호
    • 한국식품과학회지
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    • 제47권5호
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    • pp.652-657
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    • 2015
  • 다량의 ${\gamma}$-aminobutric acid (GABA)를 함유한 뽕잎차를 제조하기 위해 뽕잎을 채취하여 진공 및 질소가스 치환의 방법으로 12시간 무산소 처리를 하였다. 이후 차를 제조하고 GABA 및 그밖의 주요 성분의 함량 변화를 측정한 결과 뽕잎에 질소 가스 치환처리 및 진공처리를 한 실험군 모두 GABA의 함량이 현저하게 증가하였고(436-472%) 글루탐산은 감소하였다. 일반성분 및 수용성고형물은 거의 변화가 없었으며, 유리당, 카테킨 및 총페놀 함량이 다소 감소한 것으로 나타났다. 뽕잎을 무산소 처리하는 두가지의 방법 즉 질소 가스 치환처리와 진공처리를 비교했을 때 GABA와 주요성분의 함량은 거의 차이가 없었다. 관능평가에서 무처리군과 질소가스, 진공처리군 간에 차이가 없어 무산소 처리를 해도 기호성이 저하되지 않았다. 채잎후 무산소 가공 처리를 하고 뽕잎차를 제조하는 것은 관능적인 품질을 유지하면서도 뽕잎차의 기능을 향상시킬 수 있는 효과적인 방법이라 판단된다.

Bioconversion of Gamma-Aminobutyric Acid from Monosodium Glutamate by Lactobacillus brevis Bmb5

  • Jeong, Anna;Yong, Cheng Chung;Oh, Sejong
    • Journal of Microbiology and Biotechnology
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    • 제29권11호
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    • pp.1745-1748
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    • 2019
  • Gamma-aminobutyric acid (GABA) plays important roles in host physiology. However, the effects of GABA are greatly restricted due to its low bioavailability in the human body. Here, a high acid-tolerance GABA-producing strain, Lactobacillus brevis Bmb5, was isolated from kimchi. Bmb5 converted glutamate to GABA (7.23 ± 0.68 ㎍/μl) at a rate of 72.3%. The expression of gadB gene, encoding the enzyme involved in the decarboxylation of glutamate to GABA, was decreased upon incubation. Our findings indicate GABA production in Bmb5 is not directly correlated with gadB gene expression, providing new insight into the mechanisms underlying GABA production in Lactobacillus.

Isolation and Characterization of Lactobacillus buchneri Strains with High ${\gamma}$-Aminobutyric Acid Producing Capacity from Naturally Aged Cheese

  • Park, Ki-Bum;Oh, Suk-Heung
    • Food Science and Biotechnology
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    • 제15권1호
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    • pp.86-90
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    • 2006
  • Two lactic acid bacteria (LAB) with high ${\gamma}$-aminobutyric acid (GABA)-producing capacity were isolated from naturally aged cheese. Examination of the biochemical features using an API kit indicated that the two strains belonged to Lactobacillus. They were gram positive, rod-type bacteria, and fermented arabinose, melezitose, melibiose and xylose, but did not utilize cellobiose or trehalose. 16S rDNA sequencing analysis confirmed that they were Lactobacillus buchneri and Lactobacillus sp. They were accordingly named as Lactobacillus buchneri OPM-1 and Lactobacillus sp. OPM-2, and could produce GABA from MRS broth supplemented with 10 g/L of monosodium glutamate (MSG) at a productivity of 91.7 and 116.7 mg/L/hr, respectively. Cell extracts of L. buchneri OPM-1 and Lactobacillus sp. OPM-2 showed glutamate decarboxylase (GAD) activity, for which the optimum pH and temperature were 5.5 and $30^{\circ}C$, respectively.

Characterization of γ-Aminobutyric acid(GABA) produced by a lactic acid bacterium from button mushroom bed

  • Lee, Yun-Seok;Song, Tae-Young;Kong, Won-Sik;Yoon, Min-Ho
    • 한국버섯학회지
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    • 제11권4호
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    • pp.181-186
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    • 2013
  • ${\gamma}$-Aminobutyric acid(GABA) is a four carbon non-protein amino acid that has several well-known physiological functions, such as a postsynaptic inhibitory neurotransmitter in the brain and induction of hypotensive and tranquilizer effects. A lactic acid bacterium was isolated from button mushroom bed, which is showing high GABA productivity by TLC or HPLC analysis. The strain was identified as Lactobacillus hilgardii by analysis of 16S rDNA gene sequence. When the maximum production of GABA by L. hilgardii was investigated with various concentration of monosodium glutamate, the yield of GABA reached to be 53.65 mM at 1% mono sodium glutamate (MSG) in flask cultivation. A Glutamate decarboxylase (GAD) enzyme, which was known to convert MSG to GABA, was purified from a cell-free extract of L. hilgardii and the molecular weights of purified GAD was estimated to 60,000 by SDS-PAGE. The optimum pH and temperature of GAD were at pH4.6 and at $37^{\circ}C$, respectively. The GAD activity was increased by the addition of sulfate ions such as ammonium sulfate, sodium sulfate and magnesium sulfate, indicating that the increase of hydrophobic interaction causes the increase of GAD activity.

천왕보심단(天王補心丹)∘쌀발효추출물(GABAːgamma-aminobutyric acid 30%) 복합물의 항(抗)스트레스에 대한 유효성 연구ː무작위 배정 및 이중맹검 (Study on the Anti-stress Effect of Chenwangbosim-Dan Extract∘Fermented Rice Extract (GABA ː gamma-aminobutyric acid 30%) Complex : A double-blind, randomized, placebo-controlled study)

  • 홍초영;서상권;나승곤;조호성;이미경;진무현;노석선;주영승
    • 대한본초학회지
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    • 제38권2호
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    • pp.1-7
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    • 2023
  • Objectives : From this study, we sight to identify Anti-stress effect of Chenwangbosim-Dan (Tianwangbuxin-Dan) Extract∘Fermented Rice Extract (GABA : gamma-aminobutyric acid 30%) Complex Methods : In order to measure the degree of functional evaluation of tension relief due to stress, it was evaluated whether the psychological indicators VAS(Visual Analog Scale) and POMS(Profile Of Mood State) were improved. Which is generally used for stress measurement and has a high frequency of clinical use. All clinical trial subjects were required to take the drug once a day at 9 ± 30 min in the morning for 2 weeks. Results : After intake, the group that Chenwangbosim-Dan(Tianwangbuxin-Dan) Extract∘Fermented Rice Extract (GABA : gamma-aminobutyric acid 30%) Complex had a statistically significant improvement effect compared to before intake due to an improved 30.81% of the VAS scores. The POMS-T score improved 54.13%, the POMS-V score improved 117.5% and the POMS-F score improved 59%, which had a statistically significant effect compared to Placebo group (p<0.001). There is a significant difference between two group, so even considering the placebo effect, the anti stress effect was confirmed in the Chenwangbosim-Dan (Tianwangbuxin-Dan) Extract∘Fermented Rice Extract (GABA : gamma-aminobutyric acid 30%) Complex intake group. Conclusions : The above results showed that the Chenwangbosim-Dan(Tianwangbuxin-Dan) Extract∘Fermented Rice Extract (GABA : gamma-aminobutyric acid 30%) Complex had an anti-stress effect. Therefore, it is expected to be developed as a safe and comfortable mental care health functional food that can reduce the risk of drug abuse.

Betaine-γ-aminobutyric acid transporter 1 (BGT-1/mGAT2)과 Munc-18-interacting (Mint) 단백질의 PDZ 결합 (Betaine-γ-aminobutyric Acid Transporter 1 (BGT-1/mGAT2) Interacts with the PDZ Domain of Munc-18 Interacting Proteins (Mints))

  • 김상진;정영주;최선희;최춘연;전희재;문일수;석대현;장원희
    • 생명과학회지
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    • 제22권9호
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    • pp.1159-1165
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    • 2012
  • ${\gamma}$-Aminobutyric acid (GABA)는 신경세포 밖으로 분비된 후 GABA 수송체들(GATs)에 의하여 다시 신경세포 안으로 재흡수 된다. 그러나, GABA 수송체들이 어떻게 연접전막의 위치에 안정적으로 존재하는지 또한 어떤 단백질과 결합하여 조절을 받는지는 알려져 있지 않다. 본 연구에서 효모 two-hybrid system을 이용하여 betaine-${\gamma}$-aminobutyric acid transporter 1 (BGT-1/mGAT2)의 C-말단과 특이적으로 결합하는 Munc-18-interacting (Mint) 단백질을 분리하였다. BGT-1/mGAT2의 C-말단에 존재하는 "T-H-L" 아미노산배열은 Mint2와의 결합에 필수적으로 관여하였다. Mint2은 BGT-1/mGAT2와는 결합하지만, 다른 종류의 GAT와는 결합하지 않았다. 또한 HEK-293T 세포에 Mint2와 BGT-1/mGAT2을 동시에 발현시켜 면역침강한 결과 두 단백질은 같이 면역침강하였으며, 두 단백질은 세포 내에서 세포막 부위에 같이 존재함도 확인하였다. 이러한 결과들은 Mint2가 BGT-1/mGAT2와 결합하여 BGT-1/mGAT2을 조절하는 역할을 함을 시사한다.

Analysis of γ-Aminobutyric Acid Content in Fermented Plant Products by HPLC/UV

  • Lee, Dong Gu;Cho, Sunghun;Lee, Jamin;Cho, Seon Haeng;Lee, Sanghyun
    • Journal of Applied Biological Chemistry
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    • 제58권4호
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    • pp.303-309
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    • 2015
  • ${\gamma}$-Aminobutyric acid (GABA) content in fermented plant products and their main plant materials (aerial part of Acanthopanax sessiliflorus, fruit of Crataegus pinnatifida, and whole plant of Morus alba) was determined by high-performance liquid chromatography. GABA was quantified using a reverse-phase column with a gradient elution program (water:acetonitrile =90:10 to 0:100 for 40 min). UV detection was conducted at 280 nm. GABA content was measured in fermented plant products (15.07 mg/g), aerial part of A. sessiliflorus (4.49 mg/g), fruit of C. pinnatifida (10.59 mg/g), and whole plant of M. alba (2.31 mg/g). The presence of GABA in fermented plant products, including A. sessiliflorus, C. pinnatifida, and M. alba is important in industrial application for health supplements.

Enhanced Production of ${\gamma}$-Aminobutyric Acid Using Rice Bran Extracts by Lactobacillus sakei B2-16

  • Kook, Moo-Chang;Seo, Myung-Ji;Cheigh, Chan-Ick;Pyun, Yu-Ryang;Cho, Seok-Cheol;Park, Hoon
    • Journal of Microbiology and Biotechnology
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    • 제20권4호
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    • pp.763-766
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    • 2010
  • An efficient and simple fermentation process was developed for the production of ${\gamma}$-aminobutyric acid (GABA) by Lactobacillus sakei B2-16. When the L. sakei B2-16 was cultivated in the rice bran extracts medium containing 4% sucrose, 1% yeast extract, and 12% monosodium glutamate, the maximum GABA concentration reached 660.0 mM with 100% conversion yield, showing the 2.4- fold higher GABA concentration compared with the modified MRS medium without the rice bran extracts. The GABA production was scaled-up from a laboratory scale (5 l) to a pilot (300 l) and a plant (5,000 l) scale to investigate the application possibility of GABA production to industrial fields. The production yields at the pilot and plant scales were similar to the laboratory scale using rice bran extracts medium, which could be effective for the low-cost production of GABA.