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Jin Y, Wu J, Hu D, Li J, Zhu W, Yuan L, Chen X, Yao J. Gamma-Aminobutyric Acid-Producing Levilactobacillus brevis Strains as Probiotics in Litchi Juice Fermentation. Foods 2023; 12:foods12020302. [PMID: 36673393 PMCID: PMC9857889 DOI: 10.3390/foods12020302] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/03/2023] [Accepted: 01/05/2023] [Indexed: 01/11/2023] Open
Abstract
Levilactobacillus brevis strains can be isolated from traditional Chinese pickles and used as the starter cultures to improve the nutritional profiles of fermented juices. Three L. brevis strains (LBG-29, LBG-24, LBD−14) that produce high levels of gamma-aminobutyric acid (GABA; >300 mg/L) were isolated from traditional Chinese pickles. The strains showed tolerance to low pH and high bile salts and exhibited safety in vitro. Litchi juice was fermented using each strain at 37 °C for 48 h. The litchi juice was determined to be a good substrate for fermentation as the process enhanced its functional profile. Overall, cell vitality increased (above 8.7 log10 CFU/mL), the antioxidant activities of 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric ion-reducing antioxidant power (FRAP) were significantly increased, and the antioxidant capacity of the 2,2′-amino-di(3-ethyl-benzothiazoline sulphonic acid-6)ammonium salt (ABTS) was decreased. There was also a significant increase in the GABA and acetic acid content after LBG-29 and LBG-24 fermentation. It was thus determined that the LBG-29 and LBG-24 strains could be used to improve beverage functionality and aid in the development of new products. This is the first report of litchi fermentation using L. brevis as a starter culture. Further research is required to elucidate the functional benefits for the human body and the nutritional and functional properties during its shelf life.
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Affiliation(s)
- Yiwen Jin
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- Science Island Branch, Graduate School of USTC, Hefei 230026, China
| | - Jinyong Wu
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- Hefei CAS Health Bio-Industrial Technology Co., Ltd., Hefei 230031, China
| | - Dan Hu
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- Science Island Branch, Graduate School of USTC, Hefei 230026, China
| | - Jun Li
- Hefei CAS Health Bio-Industrial Technology Co., Ltd., Hefei 230031, China
| | - Weiwei Zhu
- Wuhan Zhongke Optics Valley Green Biotechnology Co., Ltd., Wuhan 430075, China
| | - Lixia Yuan
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- Hefei CAS Health Bio-Industrial Technology Co., Ltd., Hefei 230031, China
| | - Xiangsong Chen
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- Hefei CAS Health Bio-Industrial Technology Co., Ltd., Hefei 230031, China
- Correspondence: or (X.C.); (J.Y.); Tel.: +86-551-65591399 (X.C. & J.Y.)
| | - Jianming Yao
- Science Island Branch, Graduate School of USTC, Hefei 230026, China
- Correspondence: or (X.C.); (J.Y.); Tel.: +86-551-65591399 (X.C. & J.Y.)
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Yin L, Ye J, Kuang S, Guan Y, You R. Induction, purification, and characterization of a thermo and pH stable laccase from Abortiporus biennis J2 and its application on the clarification of litchi juice. Biosci Biotechnol Biochem 2017; 81:1033-1040. [PMID: 28095737 DOI: 10.1080/09168451.2017.1279850] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
A fungus J2 producing laccase with high yield was screened in soils and identified as Abortiporus biennis. The production of laccase was induced by 0.1 mM Cu2+, 0.1 mM tannic acid, and 0.5 M ethanol. The laccase from Abortiporus biennis J2 was purified to electrophoretic homogeneity by a couple of steps. The N-terminal amino acid sequence of the enzyme was AIGPTADLNISNADI. The properties of the purified laccase were investigated. The result showed the laccase from Abortiporus biennis J2 is a thermo and pH stable enzyme. The laccase activity was inhibited by Hg2+, Cd2+, Fe2+, Ag+, Cu2+, and Zn2+, while promoted by Mg2+, Mn2+ at 10 mM level. Purified laccase was used to the clarification of litchi juice. After treatment with this laccase, the phenolic content of litchi juice had been found to be greatly reduced along with an increase in the clarity of the juice. The result indicated the potential of this laccase for application in juice procession.
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Affiliation(s)
- Liang Yin
- a School of Life Science , South China Normal University , Guangzhou , China
| | - Jiayin Ye
- a School of Life Science , South China Normal University , Guangzhou , China
| | - Sibi Kuang
- a School of Life Science , South China Normal University , Guangzhou , China
| | - Yanqing Guan
- a School of Life Science , South China Normal University , Guangzhou , China
| | - Rong You
- a School of Life Science , South China Normal University , Guangzhou , China
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