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Liu WK, Su BM, Xu XQ, Xu L, Lin J. Multienzymatic Cascade for Synthesis of Hydroxytyrosol via Two-Stage Biocatalysis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:15293-15300. [PMID: 38940657 DOI: 10.1021/acs.jafc.4c04228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
Hydroxytyrosol, a naturally occurring compound with antioxidant and antiviral activity, is widely applied in the cosmetic, food, and nutraceutical industries. The development of a biocatalytic approach for producing hydroxytyrosol from simple and readily accessible substrates remains a challenge. Here, we designed and implemented an effective biocatalytic cascade to obtain hydroxytyrosol from 3,4-dihydroxybenzaldehyde and l-threonine via a four-step enzymatic cascade composed of seven enzymes. To prevent cross-reactions and protein expression burden caused by multiple enzymes expressed in a single cell, the designed enzymatic cascade was divided into two modules and catalyzed in a stepwise manner. The first module (FM) assisted the assembly of 3,4-dihydroxybenzaldehyde and l-threonine into (2S,3R)-2-amino-3-(3,4-dihydroxyphenyl)-3-hydroxypropanoic acid, and the second module (SM) entailed converting (2S,3R)-2-amino-3-(3,4-dihydroxyphenyl)-3-hydroxypropanoic acid into hydroxytyrosol. Each module was cloned into Escherichia coli BL21 (DE3) and engineered in parallel by fine-tuning enzyme expression, resulting in two engineered whole-cell catalyst modules, BL21(FM01) and BL21(SM13), capable of converting 30 mM 3,4-dihydroxybenzaldehyde to 28.7 mM hydroxytyrosol with a high space-time yield (0.88 g/L/h). To summarize, the current study proposes a simple and effective approach for biosynthesizing hydroxytyrosol from low-cost substrates and thus has great potential for industrial applications.
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Affiliation(s)
- Wen-Kai Liu
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
- Institute of Enzyme Catalysis and Synthetic Biotechnology, Fuzhou University, Fuzhou 350108, China
| | - Bing-Mei Su
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
- Institute of Enzyme Catalysis and Synthetic Biotechnology, Fuzhou University, Fuzhou 350108, China
| | - Xin-Qi Xu
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
- Institute of Enzyme Catalysis and Synthetic Biotechnology, Fuzhou University, Fuzhou 350108, China
| | - Lian Xu
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
- Institute of Enzyme Catalysis and Synthetic Biotechnology, Fuzhou University, Fuzhou 350108, China
| | - Juan Lin
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
- Institute of Enzyme Catalysis and Synthetic Biotechnology, Fuzhou University, Fuzhou 350108, China
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2
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Tang J, Wang J, Gong P, Zhang H, Zhang M, Qi C, Chen G, Wang C, Chen W. Biosynthesis and Biotechnological Synthesis of Hydroxytyrosol. Foods 2024; 13:1694. [PMID: 38890922 PMCID: PMC11171820 DOI: 10.3390/foods13111694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/21/2024] [Accepted: 05/25/2024] [Indexed: 06/20/2024] Open
Abstract
Hydroxytyrosol (HT), a plant-derived phenolic compound, is recognized for its potent antioxidant capabilities alongside a spectrum of pharmacological benefits, including anti-inflammatory, anti-cancer, anti-bacterial, and anti-viral properties. These attributes have propelled HT into the spotlight as a premier nutraceutical and food additive, heralding a new era in health and wellness applications. Traditional methods for HT production, encompassing physico-chemical techniques and plant extraction, are increasingly being supplanted by biotechnological approaches. These modern methodologies offer several advantages, notably environmental sustainability, safety, and cost-effectiveness, which align with current demands for green and efficient production processes. This review delves into the biosynthetic pathways of HT, highlighting the enzymatic steps involved and the pivotal role of genetic and metabolic engineering in enhancing HT yield. It also surveys the latest progress in the biotechnological synthesis of HT, examining innovative strategies that leverage both genetically modified and non-modified organisms. Furthermore, this review explores the burgeoning potential of HT as a nutraceutical, underscoring its diverse applications and the implications for human health. Through a detailed examination of both the biosynthesis and biotechnological advances in HT production, this review contributes valuable insights to the field, charting a course towards the sustainable and scalable production of this multifaceted compound.
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Affiliation(s)
- Jiali Tang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; (J.T.); (J.W.); (P.G.); (H.Z.); (M.Z.); (C.W.)
| | - Jiaying Wang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; (J.T.); (J.W.); (P.G.); (H.Z.); (M.Z.); (C.W.)
| | - Pengfei Gong
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; (J.T.); (J.W.); (P.G.); (H.Z.); (M.Z.); (C.W.)
| | - Haijing Zhang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; (J.T.); (J.W.); (P.G.); (H.Z.); (M.Z.); (C.W.)
| | - Mengyao Zhang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; (J.T.); (J.W.); (P.G.); (H.Z.); (M.Z.); (C.W.)
| | - Chenchen Qi
- ACK Co., Ltd., Urumqi 830022, China; (C.Q.); (G.C.)
| | - Guohui Chen
- ACK Co., Ltd., Urumqi 830022, China; (C.Q.); (G.C.)
| | - Chengtao Wang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; (J.T.); (J.W.); (P.G.); (H.Z.); (M.Z.); (C.W.)
| | - Wei Chen
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; (J.T.); (J.W.); (P.G.); (H.Z.); (M.Z.); (C.W.)
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3
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Sun P, Zheng P, Chen P, Wu D, Xu S. Engineering of 4-hydroxyphenylacetate 3-hydroxylase derived from Pseudomonas aeruginosa for the ortho-hydroxylation of ferulic acid. Int J Biol Macromol 2024; 264:130545. [PMID: 38431000 DOI: 10.1016/j.ijbiomac.2024.130545] [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: 07/18/2023] [Revised: 02/21/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Abstract
Polyphenolic compounds have natural antioxidant properties, and their antioxidant activity is usually related to the number and position of hydroxyls. Here, we successfully applied the engineered 4-hydroxyphenylacetate 3-hydroxylases (4HPA3Hs) derived from Pseudomonas aeruginosa to catalyze ferulic acid (FA) synthesis of ortho-hydroxyferulic acid (5-hydroxyferulic acid, 5-OHFA). Through optimization of co-expression, the oxygenase component (PaHpaB) and the reductase component (PaHpaC) in E. coli, and optimization of whole-cell catalytic conditions, the engineered strain BC catalyzed ortho-hydroxylation of 2 g/L of FA with a yield of 75 % from 39 %. Through tunnel engineering of PaHpaB, the obtained mutants F301A and Q376A almost completely transformed 2 g/L of FA. Further, a multiple mutant L214A/F301A/Q376A converted 4 g/L FA into 5-OHFA within 12 h, and the yield reached 99.9 %, which was approximately 2.39-fold of the wild type. The kcat/Km value of L214A/F301A/Q376A was about 307 times greater than that of the wide type. Analysis of three-dimensional structural models showed that L214, F301, and Q376 mutated into Ala, which greatly shortened the side chain and broadened the tunnel size, thereby significantly improving the catalytic efficiency of L214A/F301A/Q376A. This biosynthesis of 5-OHFA is simple, efficient, and green, suggesting that it is useful for efficient biosynthesis of polyphenolic compounds.
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Affiliation(s)
- Ping Sun
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Pu Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China..
| | - Pengcheng Chen
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Dan Wu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Shuping Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
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4
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Wang S, Zhao F, Yang M, Lin Y, Han S. Metabolic engineering of Saccharomyces cerevisiae for the synthesis of valuable chemicals. Crit Rev Biotechnol 2024; 44:163-190. [PMID: 36596577 DOI: 10.1080/07388551.2022.2153008] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/11/2022] [Accepted: 10/29/2022] [Indexed: 01/05/2023]
Abstract
In the twenty first century, biotechnology offers great opportunities and solutions to climate change mitigation, energy and food security and resource efficiency. The use of metabolic engineering to modify microorganisms for producing industrially significant chemicals is developing and becoming a trend. As a famous, generally recognized as a safe (GRAS) model microorganism, Saccharomyces cerevisiae is widely used due to its excellent operational convenience and high fermentation efficiency. This review summarizes recent advancements in the field of using metabolic engineering strategies to construct engineered S. cerevisiae over the past ten years. Five different types of compounds are classified by their metabolites, and the modified metabolic pathways and strategies are summarized and discussed independently. This review may provide guidance for future metabolic engineering efforts toward such compounds and analogues. Additionally, the limitations of S. cerevisiae as a cell factory and its future trends are comprehensively discussed.
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Affiliation(s)
- Shuai Wang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Fengguang Zhao
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, China
| | - Manli Yang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Ying Lin
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Shuangyan Han
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
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5
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Sun P, Xu S, Tian Y, Chen P, Wu D, Zheng P. 4-Hydroxyphenylacetate 3-Hydroxylase (4HPA3H): A Vigorous Monooxygenase for Versatile O-Hydroxylation Applications in the Biosynthesis of Phenolic Derivatives. Int J Mol Sci 2024; 25:1222. [PMID: 38279222 PMCID: PMC10816480 DOI: 10.3390/ijms25021222] [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: 01/03/2024] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 01/28/2024] Open
Abstract
4-Hydroxyphenylacetate 3-hydroxylase (4HPA3H) is a long-known class of two-component flavin-dependent monooxygenases from bacteria, including an oxygenase component (EC 1.14.14.9) and a reductase component (EC 1.5.1.36), with the latter being accountable for delivering the cofactor (reduced flavin) essential for o-hydroxylation. 4HPA3H has a broad substrate spectrum involved in key biological processes, including cellular catabolism, detoxification, and the biosynthesis of bioactive molecules. Additionally, it specifically hydroxylates the o-position of the C4 position of the benzene ring in phenolic compounds, generating high-value polyhydroxyphenols. As a non-P450 o-hydroxylase, 4HPA3H offers a viable alternative for the de novo synthesis of valuable natural products. The enzyme holds the potential to replace plant-derived P450s in the o-hydroxylation of plant polyphenols, addressing the current significant challenge in engineering specific microbial strains with P450s. This review summarizes the source distribution, structural properties, and mechanism of 4HPA3Hs and their application in the biosynthesis of natural products in recent years. The potential industrial applications and prospects of 4HPA3H biocatalysts are also presented.
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Affiliation(s)
| | | | | | | | | | - Pu Zheng
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; (P.S.); (Y.T.); (P.C.); (D.W.)
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6
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Wang L, Wang H, Chen J, Hu M, Shan X, Zhou J. Efficient Production of Chlorogenic Acid in Escherichia coli Via Modular Pathway and Cofactor Engineering. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:15204-15212. [PMID: 37788431 DOI: 10.1021/acs.jafc.3c04419] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Chlorogenic acid is a natural phenolic compound widely used in the food and daily chemical industries. Compared to plant extraction, microbial cell factories provide a green and sustainable production method for the production of chlorogenic acid. However, complex metabolic flux distribution and potential byproducts limited the biosynthesis of chlorogenic acid in microorganisms. A de novo biosynthesis pathway for chlorogenic acid was constructed in Escherichia coli via modular engineering. Increasing the shikimate pathway flux greatly promoted chlorogenic acid production, and the influence of pyruvate metabolism on chlorogenic acid synthesis was also explored. The supply of cofactors for the key enzymes quinate/shikimate 5-dehydrogenase (YdiB) and 4-hydroxyphenylacetate 3-monooxygenase (HpaBC) was enhanced by a cofactor regeneration system. Furthermore, mutants of YdiB were verified for chlorogenic acid production in vivo. Chlorogenic acid browning occurred when the buffer pH of the buffer exceeded 6.0, but two-stage pH control achieved a chlorogenic acid titer of 2789.2 mg/L in a 5 L fermenter, the highest reported to date. This study provided a strategy for the efficient production of chlorogenic acid from simple carbon sources.
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Affiliation(s)
- Lian Wang
- Engineering Research Center of Ministry of Education on Food Synthetic Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education and School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Huijing Wang
- Engineering Research Center of Ministry of Education on Food Synthetic Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Jianbin Chen
- Engineering Research Center of Ministry of Education on Food Synthetic Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Minglong Hu
- Engineering Research Center of Ministry of Education on Food Synthetic Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Xiaoyu Shan
- Engineering Research Center of Ministry of Education on Food Synthetic Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education and School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Province Engineering Research Center of Food Synthetic Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jingwen Zhou
- Engineering Research Center of Ministry of Education on Food Synthetic Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Science Center for Future Foods, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education and School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Province Engineering Research Center of Food Synthetic Biotechnology, Jiangnan University, Wuxi 214122, China
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7
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Wang Y, Chen Y, Zhang A, Chen K, Ouyang P. Advances in the microbial synthesis of the neurotransmitter serotonin. Appl Microbiol Biotechnol 2023:10.1007/s00253-023-12584-3. [PMID: 37326681 DOI: 10.1007/s00253-023-12584-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 05/05/2023] [Accepted: 05/10/2023] [Indexed: 06/17/2023]
Abstract
Serotonin, as a monoamine neurotransmitter, modulates the activity of the nervous system. Due to its importance in the coordination of movement and regulation of mood, impairments in the synthesis and homeostasis of serotonin are involved in numerous disorders, including depression, Parkinson's disease, and anxiety. Currently, serotonin is primarily obtained via natural extraction. But this method is time-consuming and low yield, as well as unstable supply of raw materials. With the development of synthetic biology, researchers have established the method of microbial synthesis of serotonin. Compared with natural extraction, microbial synthesis has the advantages of short production cycle, continuous production, not limited by season and source, and environment-friendly; hence, it has garnered considerable research attention. However, the yield of serotonin is still too low to industrialization. Therefore, this review provides the latest progress and examples that illustrate the synthesis pathways of serotonin as well as proposes strategies for increasing the production of serotonin. KEY POINTS: • Two biosynthesis pathways of serotonin are introduced. • L-tryptophan hydroxylation is the rate-limiting step in serotonin biosynthesis. • Effective strategies are proposed to improve serotonin production.
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Affiliation(s)
- Yingying Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, People's Republic of China
| | - Yan Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, People's Republic of China
| | - Alei Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, People's Republic of China
| | - Kequan Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, People's Republic of China.
| | - Pingkai Ouyang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, People's Republic of China
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8
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Gong P, Tang J, Wang J, Wang C, Chen W. A Novel Microbial Consortia Catalysis Strategy for the Production of Hydroxytyrosol from Tyrosine. Int J Mol Sci 2023; 24:ijms24086944. [PMID: 37108108 PMCID: PMC10139182 DOI: 10.3390/ijms24086944] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/04/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Hydroxytyrosol, a valuable plant-derived phenolic compound, is increasingly produced from microbial fermentation. However, the promiscuity of the key enzyme HpaBC, the two-component flavin-dependent monooxygenase from Escherichia coli, often leads to low yields. To address this limitation, we developed a novel strategy utilizing microbial consortia catalysis for hydroxytyrosol production. We designed a biosynthetic pathway using tyrosine as the substrate and selected enzymes and overexpressing glutamate dehydrogenase GdhA to realize the cofactor cycling by coupling reactions catalyzed by the transaminase and the reductase. Additionally, the biosynthetic pathway was divided into two parts and performed by separate E. coli strains. Furthermore, we optimized the inoculation time, strain ratio, and pH to maximize the hydroxytyrosol yield. Glycerol and ascorbic acid were added to the co-culture, resulting in a 92% increase in hydroxytyrosol yield. Using this approach, the production of 9.2 mM hydroxytyrosol was achieved from 10 mM tyrosine. This study presents a practical approach for the microbial production of hydroxytyrosol that can be promoted to produce other value-added compounds.
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Affiliation(s)
- Pengfei Gong
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Jiali Tang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Jiaying Wang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Chengtao Wang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Wei Chen
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
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9
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Liu H, Wu X, Ma H, Li J, Liu Z, Guo X, Dong J, Zou S, Luo Y. High-Level Production of Hydroxytyrosol in Engineered Saccharomyces cerevisiae. ACS Synth Biol 2022; 11:3706-3713. [PMID: 36345886 DOI: 10.1021/acssynbio.2c00316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Hydroxytyrosol (HT) is a valuable aromatic compound with numerous applications. Herein, we enabled the efficient and scalable de novo HT production in engineered Saccharomyces cerevisiae (S. cerevisiae) from glucose. Starting from a tyrosol-overproducing strain, six HpaB/HpaC combinations were investigated, and the best catalytic performance was acquired with HpaB from Pseudomonas aeruginosa (PaHpaB) and HpaC from Escherichia coli (EcHpaC), resulting in 425.7 mg/L HT in shake flasks. Next, weakening the tryptophan biosynthetic pathway through downregulating the expression of TRP2 (encoding anthranilate synthase) further improved the HT titer by 27.2% compared to the base strain. Moreover, the cytosolic NADH supply was improved through introducing the feedback-resistant mutant of the TyrA (the NAD+-dependent chorismate mutase/prephenate dehydrogenase, TyrA*) from E. coli, which further increased the HT titer by 36.9% compared to the base strain. The best performing strain was obtained by optimizing the biosynthesis of HT in S. cerevisiae through a screening for an effective HpaB/HpaC combination, biosynthetic flux rewiring, and cofactor engineering, which enabled the titer of HT reaching 1120.0 mg/L in the shake flask. Finally, the engineered strain produced 6.97 g/L of HT by fed-batch fermentation, which represents the highest titer for de novo HT biosynthesis in microorganisms reported to date.
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Affiliation(s)
- Huayi Liu
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xinxin Wu
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - He Ma
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jian Li
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhenyu Liu
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xufan Guo
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jia Dong
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Shaolan Zou
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Yunzi Luo
- Frontiers Science Center of Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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10
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Roldán-López D, Muñiz-Calvo S, Daroqui N, Knez M, Guillamón JM, Pérez-Torrado R. The potential role of yeasts in the mitigation of health issues related to beer consumption. Crit Rev Food Sci Nutr 2022; 64:3059-3074. [PMID: 36222026 DOI: 10.1080/10408398.2022.2129584] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Food consumption of healthier products has become an essential trend in the food sector. This is also the case in beer, a biochemical process of transformation performed by yeast cells. More and more studies proclaim the need to reduce ethanol content in alcoholic drinks, certainly the most important health issue of beer consumption. In this review we gather key health issues related to beer consumption and the last advances regarding the use of yeast to attenuate those health problems. Furthermore, we have included the latest findings about the general positive impact of yeast in health as a consequence of its ability to biotransform polyphenolic compounds present in the wort, producing healthy compounds as hydroxytyrosol or melatonin, and its ability to perform as a probiotic driver. Besides, a group of population with chronic diseases as diabetes or celiac disease could take advantage of low carbohydrate or gluten-free beers, respectively. The role of yeast in beer production has been traditionally associated to its fermentative power. But here we have found a change in this dogma in the last years toward yeasts being a main driver to enhance healthy aspects of beer. The key findings are discussed and possible future directions are proposed.
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Affiliation(s)
- David Roldán-López
- Department of Food Biotechnology, Instituto de Agroquímica y Tecnología de los Alimentos, IATA-CSIC, Paterna, Spain
| | - Sara Muñiz-Calvo
- Department of Food Biotechnology, Instituto de Agroquímica y Tecnología de los Alimentos, IATA-CSIC, Paterna, Spain
| | - Noemi Daroqui
- Department of Food Biotechnology, Instituto de Agroquímica y Tecnología de los Alimentos, IATA-CSIC, Paterna, Spain
| | - Masa Knez
- Department of Food Biotechnology, Instituto de Agroquímica y Tecnología de los Alimentos, IATA-CSIC, Paterna, Spain
| | - Jose Manuel Guillamón
- Department of Food Biotechnology, Instituto de Agroquímica y Tecnología de los Alimentos, IATA-CSIC, Paterna, Spain
| | - Roberto Pérez-Torrado
- Department of Food Biotechnology, Instituto de Agroquímica y Tecnología de los Alimentos, IATA-CSIC, Paterna, Spain
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Liu Y, Song D, Hu H, Yang R, Lyu X. De Novo Production of Hydroxytyrosol by Saccharomyces cerevisiae-Escherichia coli Coculture Engineering. ACS Synth Biol 2022; 11:3067-3077. [PMID: 35952699 DOI: 10.1021/acssynbio.2c00300] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Hydroxytyrosol is a valuable plant-derived phenolic compound with excellent pharmacological activities for application in the food and health care industries. Microbial biosynthesis provides a promising approach for sustainable production of hydroxytyrosol via metabolic engineering. However, its efficient production is limited by the machinery and resources available in the commonly used individual microbial platform, for example, Escherichia coli, Saccharomyces cerevisiae. In this study, a S. cerevisiae-E. coli coculture system was designed for de novo biosynthesis of hydroxytyrosol by taking advantage of their inherent metabolic properties, whereby S. cerevisiae was engineered for de novo production of tyrosol based on an endogenous Ehrlich pathway, and E. coli was dedicated to converting tyrosol to hydroxytyrosol by use of native hydroxyphenylacetate 3-monooxygenase (EcHpaBC). To enhance hydroxytyrosol production, intra- and intermodule engineering was employed in this microbial consortium: (I) in the upstream S. cerevisiae strain, multipath regulations combining with a glucose-sensitive GAL regulation system were engineered to enhance the precursor supply, resulting in significant increase of tyrosol production (from 17.60 mg/L to 461.07 mg/L); (II) Echpabc was overexpressed in the downstream E. coli strain, improving the conversion rate of tyrosol to hydroxytyrosol from 0.03% to 86.02%; (III) and last, intermodule engineering with this coculture system was performed by optimization of the initial inoculation ratio of each population and fermentation conditions, achieving 435.32 mg/L of hydroxytyrosol. This S. cerevisiae-E. coli coculture strategy provides a new opportunity for de novo production of hydroxytyrosol from inexpensive feedstock.
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Affiliation(s)
- Yingjie Liu
- School of Food Science and Technology, Jiangnan University, 214122, Wuxi, P. R. China
| | - Dong Song
- Jiangxi Baiyue Food Co. Ltd, Pingxiang, Jiangxi 337000, P. R. China
| | - Haitao Hu
- School of Food Science and Technology, Jiangnan University, 214122, Wuxi, P. R. China
| | - Ruijin Yang
- School of Food Science and Technology, Jiangnan University, 214122, Wuxi, P. R. China.,Jiangnan University (Rugao) Institute of Food Biotechnology, 226503, Nantong, P. R. China
| | - Xiaomei Lyu
- School of Food Science and Technology, Jiangnan University, 214122, Wuxi, P. R. China.,Jiangnan University (Rugao) Institute of Food Biotechnology, 226503, Nantong, P. R. China
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Liu Y, Liu H, Hu H, Ng KR, Yang R, Lyu X. De Novo Production of Hydroxytyrosol by Metabolic Engineering of Saccharomyces cerevisiae. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:7490-7499. [PMID: 35649155 DOI: 10.1021/acs.jafc.2c02137] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Hydroxytyrosol is an olive-derived phenolic compound of increasing commercial interest due to its health-promoting properties. In this study, a high-yield hydroxytyrosol-producing Saccharomyces cerevisiae cell factory was established via a comprehensive metabolic engineering scheme. First, de novo biosynthetic pathway of hydroxytyrosol was constructed in yeast by gene screening and overexpression of different phenol hydroxylases, among which paHD (from Pseudomonas aeruginosa) displayed the best catalytic performance. Next, hydroxytyrosol precursor supply was enhanced via a multimodular engineering approach: elimination of tyrosine feedback inhibition through genomic integration of aro4K229L and aro7G141S, construction of an aromatic aldehyde synthase (AAS)-based tyrosine metabolic pathway, and redistribution of metabolic flux between glycolytic pathway and pentose phosphate pathway (PPP) by introducing the exogenous gene Bbxfpkopt. As a result, the titer of hydroxytyrosol was improved by 6.88-fold. Finally, a glucose-responsive dynamic regulation system based on GAL80 deletion was implemented, resulting in the final hydroxytyrosol yields of 308.65 mg/L and 167.98 mg/g cell mass, the highest known from de novo production in S. cerevisiae to date.
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Affiliation(s)
- Yingjie Liu
- School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
| | - Han Liu
- School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
| | - Haitao Hu
- School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
| | - Kuan Rei Ng
- Food Science and Technology Programme, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Ruijin Yang
- School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
| | - Xiaomei Lyu
- School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
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Bisquert R, Planells-Cárcel A, Valera-García E, Guillamón JM, Muñiz-Calvo S. Metabolic engineering of Saccharomyces cerevisiae for hydroxytyrosol overproduction directly from glucose. Microb Biotechnol 2021; 15:1499-1510. [PMID: 34689412 PMCID: PMC9049601 DOI: 10.1111/1751-7915.13957] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 10/04/2021] [Accepted: 10/12/2021] [Indexed: 11/29/2022] Open
Abstract
Hydroxytyrosol (HT) is one of the most powerful dietary antioxidants with numerous applications in different areas, including cosmetics, nutraceuticals and food. In the present work, heterologous hydroxylase complex HpaBC from Escherichia coli was integrated into the Saccharomyces cerevisiae genome in multiple copies. HT productivity was increased by redirecting the metabolic flux towards tyrosol synthesis to avoid exogenous tyrosol or tyrosine supplementation. After evaluating the potential of our selected strain as an HT producer from glucose, we adjusted the medium composition for HT production. The combination of the selected modifications in our engineered strain, combined with culture conditions optimization, resulted in a titre of approximately 375 mg l−1 of HT obtained from shake‐flask fermentation using a minimal synthetic‐defined medium with 160 g l−1 glucose as the sole carbon source. To the best of our knowledge, this is the highest HT concentration produced by an engineered S. cerevisiae strain.
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Affiliation(s)
- Ricardo Bisquert
- Departamento de Biotecnología de Alimentos, Instituto de Agroquímica y Tecnología de Alimentos, IATA-CSIC, Agustín Escardino 7, Paterna, Valencia, 46980, Spain
| | - Andrés Planells-Cárcel
- Departamento de Biotecnología de Alimentos, Instituto de Agroquímica y Tecnología de Alimentos, IATA-CSIC, Agustín Escardino 7, Paterna, Valencia, 46980, Spain
| | - Elena Valera-García
- Departamento de Biotecnología de Alimentos, Instituto de Agroquímica y Tecnología de Alimentos, IATA-CSIC, Agustín Escardino 7, Paterna, Valencia, 46980, Spain
| | - José Manuel Guillamón
- Departamento de Biotecnología de Alimentos, Instituto de Agroquímica y Tecnología de Alimentos, IATA-CSIC, Agustín Escardino 7, Paterna, Valencia, 46980, Spain
| | - Sara Muñiz-Calvo
- Departamento de Biotecnología de Alimentos, Instituto de Agroquímica y Tecnología de Alimentos, IATA-CSIC, Agustín Escardino 7, Paterna, Valencia, 46980, Spain
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Sánchez R, Bahamonde C, Sanz C, Pérez AG. Identification and Functional Characterization of Genes Encoding Phenylacetaldehyde Reductases That Catalyze the Last Step in the Biosynthesis of Hydroxytyrosol in Olive. PLANTS 2021; 10:plants10071268. [PMID: 34206363 PMCID: PMC8309162 DOI: 10.3390/plants10071268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/14/2021] [Accepted: 06/17/2021] [Indexed: 01/12/2023]
Abstract
Hydroxytyrosol derivatives are the most important phenolic components in virgin olive oil due to their well-demonstrated biological activities. In this regard, two phenyl acetaldehyde reductase genes, OePAR1.1 and OePAR1.2, involved in hydroxytyrosol synthesis, have been identified from an olive transcriptome. Both genes were synthesized and expressed in Escherichia coli, and their encoded proteins were purified. The recombinant enzymes display high substrate specificity for 2,4-dihydroxyphenylacetaldehyde (3,4-DHPAA) to form hydroxytyrosol. The reaction catalyzed by OePAR constitutes the second, and last, biochemical step in the formation of hydroxytyrosol from the amino acid L-3,4-dihydroxyphenylalanine (L-DOPA) in olive. OePAR1.1 and OePAR1.2 enzymes exhibit high thermal stability, similar pH optima (pH 6.5), and high affinity for 3,4-DHPAA (apparent Km 0.6 and 0.8 µmol min−1 mg−1, respectively). However, OePAR1.2 exhibited higher specific activity and higher expression levels in all the olive cultivars under study. The expression analyses indicate that both OePAR1.1 and OePAR1.2 genes are temporally regulated in a cultivar-dependent manner. The information provided here could be of interest for olive breeding programs searching for new olive genotypes with the capacity to produce oils with higher levels of hydroxytyrosol derivatives.
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Liao J, Han S, Li X, He J, Secundo F, Liang H. Co-immobilization of two-component hydroxylase monooxygenase by functionalized magnetic nanoparticles for preserving high catalytic activity and enhancing enzyme stabilty. Int J Biol Macromol 2020; 164:3163-3170. [DOI: 10.1016/j.ijbiomac.2020.08.182] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 02/06/2023]
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Next Generation Winemakers: Genetic Engineering in Saccharomyces cerevisiae for Trendy Challenges. Bioengineering (Basel) 2020; 7:bioengineering7040128. [PMID: 33066502 PMCID: PMC7712467 DOI: 10.3390/bioengineering7040128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/08/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023] Open
Abstract
The most famous yeast of all, Saccharomyces cerevisiae, has been used by humankind for at least 8000 years, to produce bread, beer and wine, even without knowing about its existence. Only in the last century we have been fully aware of the amazing power of this yeast not only for ancient uses but also for biotechnology purposes. In the last decades, wine culture has become and more demanding all over the world. By applying as powerful a biotechnological tool as genetic engineering in S. cerevisiae, new horizons appear to develop fresh, improved, or modified wine characteristics, properties, flavors, fragrances or production processes, to fulfill an increasingly sophisticated market that moves around 31.4 billion € per year.
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Factors influencing the production of the antioxidant hydroxytyrosol during alcoholic fermentation: Yeast strain, initial tyrosine concentration and initial must. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Zeng B, Lai Y, Liu L, Cheng J, Zhang Y, Yuan J. Engineering Escherichia coli for High-Yielding Hydroxytyrosol Synthesis from Biobased l-Tyrosine. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:7691-7696. [PMID: 32578426 DOI: 10.1021/acs.jafc.0c03065] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hydroxytyrosol (HT) is a natural antioxidant with many associated health benefits. In this study, we established efficient enzymatic cascades for the synthesis of HT from biobased l-tyrosine. First, a dopamine-mediated route for HT production was investigated. The combination of native hydroxylase (HpaBC) from Escherichia coli and l-DOPA decarboxylase (DODC) from Pseudomonas putida could efficiently convert 5 mM l-tyrosine into dopamine with conversion above 90%. However, further incorporation of monoamine oxidase (MAO) from Micrococcus luteus and phenylacetaldehyde reductase (PAR) from Solanum lycopersicum only resulted in 3.47 mM HT with 69.4% conversion. Therefore, a second enzyme cascade that comprises HpaBC from E. coli, l-amino acid deaminase (LAAD) from Proteus mirabilis, α-keto acid decarboxylase (ARO10) from Saccharomyces cerevisiae, and PAR from S. lycopersicum was designed. This enzymatic route showed higher catalytic activity and efficiently synthesized HT. The 24.27 mM HT was obtained from 25 mM l-tyrosine with a high conversion of 97.1%, and 32.35 mM HT was produced using 50 mM l-tyrosine, which represents the highest HT titer using l-tyrosine as a substrate reported to date. In summary, we have developed a green and sustainable platform for efficient HT enzymatic synthesis.
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Affiliation(s)
- Baiyun Zeng
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian 361102, China
| | - Yumeng Lai
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian 361102, China
| | - Lijun Liu
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian 361102, China
| | - Jie Cheng
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Fujian 361102, P. R. China
| | - Yang Zhang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian 361102, China
| | - Jifeng Yuan
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian 361102, China
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Photocatalytic Partial Oxidation of Tyrosol: Improving the Selectivity Towards Hydroxytyrosol by Surface Fluorination of TiO2. Top Catal 2020. [DOI: 10.1007/s11244-020-01287-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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20
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Current advances in acteoside biosynthesis pathway elucidation and biosynthesis. Fitoterapia 2020; 142:104495. [PMID: 32045692 DOI: 10.1016/j.fitote.2020.104495] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 12/17/2022]
Abstract
Acteoside is an important bioactive natural product distributed in many plant species, composed of four moieties such as caffeic acid, glucose, rhamnose and phenylethyl alcohol, and possesses some bioactivities such as anti-inflammatory, anti-oxidant, neuro-protective, anti-tumor and so on. However, acteoside content in medicinal plants is low, and acteoside stability is bad, so acteoside biosynthesis is a problem. Recent years, acteoside biosynthesis pathway elucidation and bio-production have been widely investigated, so many achievements have been made up to now. In this study, we reviewed current advances in both the elucidation and bio-production such as the putative methods and enzymatic determination of acteoside biosynthesis pathway, functional analyses of the roles of some candidate genes for verbascoside biosynthesis by transgenic technology, acteoside production via metabolic engineering and synthetic biology approaches and plant tissue culture. Moreover, we first established a combined putative acteoside biosynthesis pathway based on its recent studies in animals, plants and microbes. Meanwhile, we pointed out both problems to shortcomings, and highlighted its future development trend. These results will provide references for the complete elucidation of acteoside biosynthesis pathway and the improvement of acteoside content in medicinal plants and acteoside production via microbial and plant metabolic engineering and synthetic biology approaches, and inform the readers critically of the latest developments of them.
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