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Xiong W, Jiang X, He J, Zhong Y, Ge X, Liu B, Zeng F. Isolation and identification of active components from Grifola frondosa and its anti-EV71 virus effect. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:4453-4464. [PMID: 38323723 DOI: 10.1002/jsfa.13332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 01/17/2024] [Accepted: 01/23/2024] [Indexed: 02/08/2024]
Abstract
BACKGROUND It is reported that anti-enterovirus 71 (EV71) drugs have some side effects on human health. Notably, fungi plays a crucial role in promoting human health and anti-virus. Grifola frondosa is a type of large medicinal and edible fungi, rich in active substances. The present study aimed to investigate the anti-EV71 effect of G. frondosa and the potential active substances. RESULTS In the present study, the water extract of G. frondosa was subjected to ethanol precipitation to obtain the water-extracted supernatant of G. frondosa (GFWS) and water-extracted precipitation of G. frondosa. Their inhibitory effects on EV71 virus were studied based on a cell model. The results showed that GFWS had stronger security and anti-EV71 effects. In addition, the chemical constituents of GFWS were identified by ultra-high performance liquid chromatography-tandem mass spectrometry, which were selected for further separation and purification. Three compounds, N-butylaniline, succinic acid and l-tryptophan, were isolated from GFWS by NMR spectroscopy. It is noteworthy that N-butylaniline and l-tryptophan were isolated and identified from the G. frondosa fruiting bodies for the first time. Our study found that l-tryptophan has anti-EV71 virus activity, which reduced EV71-induced apoptosis and significantly inhibited the replication process after virus adsorption. Furthermore, it could also bind to capsid protein VP1 to prevent the virus from attaching to the cells. CONCLUSION l-tryptophan was an inhibitor of the EV71 virus, which could be used in infant nutrition and possibly provide a new drug to treat hand, foot and mouth disease. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Wenyu Xiong
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, China
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong, China
- Engineering Research Center of Fujian Subtropical Fruit and Vegetable Processing, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiaoqin Jiang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Engineering Research Center of Fujian Subtropical Fruit and Vegetable Processing, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Junqiang He
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Engineering Research Center of Fujian Subtropical Fruit and Vegetable Processing, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yue Zhong
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Engineering Research Center of Fujian Subtropical Fruit and Vegetable Processing, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiaodong Ge
- College of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng, China
| | - Bin Liu
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Engineering Research Center of Fujian Subtropical Fruit and Vegetable Processing, Fujian Agriculture and Forestry University, Fuzhou, China
- National Engineering Research Center of JUNCAO Technology, Fuzhou, China
| | - Feng Zeng
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Engineering Research Center of Fujian Subtropical Fruit and Vegetable Processing, Fujian Agriculture and Forestry University, Fuzhou, China
- National Engineering Research Center of JUNCAO Technology, Fuzhou, China
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Endo S, Sugita T, Kamai S, Nakamura K, Yamazaki F, Sampei S, Snarskis G, Valančiūtė A, Kazemi M, Rokaitis I, Koketsu K. Selective microbial production of lacto-N-fucopentaose I in Escherichia coli using engineered α-1,2-fucosyltransferases. Metab Eng 2024; 82:1-11. [PMID: 38145749 DOI: 10.1016/j.ymben.2023.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/23/2023] [Accepted: 12/19/2023] [Indexed: 12/27/2023]
Abstract
Lacto-N-fucopentaose I (LNFP I) is the second most abundant fucosylated human milk oligosaccharide (HMO) in breast milk after 2'-fucosyllactose (2'-FL). Studies have reported that LNFP I exhibits antimicrobial activity against group B Streptococcus and antiviral effects against Enterovirus and Norovirus. Microbial production of HMOs by engineered Escherichia coli is an attractive, low-cost process, but few studies have investigated production of long-chain HMOs, including the pentasaccharide LNFP I. LNFP I is synthesized by α1,2-fucosyltransfer reaction to the N-acetylglucosamine moiety of the lacto-N-tetraose skeleton, which is catalyzed by α1,2-fucosyltransferase (α1,2-FucT). However, α1,2-FucTs competitively transfer fucose to lactose, resulting in formation of the byproduct 2'-FL. In this study, we constructed LNFP I-producing strains of E. coli with various α1,2-fucTs, and observed undesired 2'-FL accumulation during fed-batch fermentation, although, in test tube assays, some strains produced LNFP I without 2'-FL. We hypothesized that promiscuous substrate selectivity of α1,2-FucT was responsible for 2'-FL production. Therefore, to decrease the formation of byproduct 2'-FL, we designed 15 variants of FsFucT from Francisella sp. FSC1006 by rational and semi-rational design approaches. Five of these variants of FsFucT surpassed a twofold reduction in 2'-FL production compared with wild-type FsFucT while maintaining comparable levels of LNFP I production. These designs encompassed substitutions in either a loop region of the enzyme (residues 154-171), or in specific residues (Q7, H162, and L164) that influence substrate binding either directly or indirectly. In particular, the E. coli strain that expressed FsFucT_S3 variants, with a substituted loop region (residues 154-171) forming an α-helix structure, achieved an accumulation of 19.6 g/L of LNFP I and 0.04 g/L of 2'-FL, while the E. coli strain expressing the wild-type FsFucT accumulated 12.2 g/L of LNFP I and 5.85 g/L of 2'-FL during Fed-bach fermentation. Therefore, we have successfully demonstrated the selective and efficient production of the pentasaccharide LNFP I without the byproduct 2'-FL by combining protein engineering of α1,2-FucT designed through in silico structural modeling of an α1,2-FucT and docking simulation with various ligands, with metabolic engineering of the host cell.
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Affiliation(s)
- Shun Endo
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan
| | - Tomotoshi Sugita
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan
| | - Sayaka Kamai
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan
| | - Kazuki Nakamura
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan
| | - Fuhito Yamazaki
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan
| | - Sotaro Sampei
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan
| | | | | | - Masoud Kazemi
- Biomatter, Žirmūnų G. 139A, Vilnius 09120, Lithuania
| | | | - Kento Koketsu
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan.
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Chen Y, Zhu Y, Wang H, Chen R, Liu Y, Zhang W, Mu W. De novo biosynthesis of 2'-fucosyllactose in a metabolically engineered Escherichia coli using a novel ɑ1,2-fucosyltransferase from Azospirillum lipoferum. BIORESOURCE TECHNOLOGY 2023; 374:128818. [PMID: 36868425 DOI: 10.1016/j.biortech.2023.128818] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Human milk oligosaccharides are complex, indigestible oligosaccharides that provide ideal nutrition for infant development. Here, 2'-fucosyllactose was efficiently produced in Escherichia coli by using a biosynthetic pathway. For this, both lacZ and wcaJ (encoding β-galactosidase and UDP-glucose lipid carrier transferase, respectively) were deleted to enhance the 2'-fucosyllactose biosynthesis. To further enhance 2'-fucosyllactose production, SAMT from Azospirillum lipoferum was inserted into the chromosome of the engineered strain, and the native promoter was replaced with a strong constitutive promoter (PJ23119). The titer of 2'-fucosyllactose was increased to 8.03 g/L by introducing the regulators rcsA and rcsB into the recombinant strains. Compared to wbgL-based strains, only 2'-fucosyllactose was produced in SAMT-based strains without other by-products. Finally, the highest titer of 2'-fucosyllactose reached 112.56 g/L in a 5 L bioreactor by fed-batch cultivation, with a productivity of 1.10 g/L/h and a yield of 0.98 mol/mol lactose, indicating a strong potential in industrial production.
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Affiliation(s)
- Yihan Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Hao Wang
- Bloomage Biotechnology Corp., Ltd., Jinan, Shandong 250010, People's Republic of China
| | - Roulin Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yuanlin Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
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