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Ida M, Kawakami H, Fukuhara K, Mizuno K. Gene isolation and enzymatic characterization of UDP-glycosyltransferases of terpene glucoside biosynthesis involved in linalyl-glycoside accumulation in Coffea arabica. Biochem Biophys Res Commun 2024; 733:150694. [PMID: 39293330 DOI: 10.1016/j.bbrc.2024.150694] [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: 08/24/2024] [Revised: 08/27/2024] [Accepted: 09/12/2024] [Indexed: 09/20/2024]
Abstract
Terpenes, one of the secondary metabolites produced by plants, have diverse physiological functions. They are volatile compounds with physiological bioactivities (e.g., insect repellent, attracting enemies, and interacting with other plants). Terpenoids are also essential for flavor and aroma in plant-derived foods. In coffee, its aroma decides the value of coffee beans. Linalool, one of the volatile terpene compounds, is dominant in the coffee aroma. Coffee, with its good flavor and aroma, has high demand worldwide. Because terpenoids generally accumulate as glycosides in plant cells, glycosylation is catalyzed by UDP-glycosyltransferases (UGTs). Two linalyl-diglycosides have been identified: terpenoids reflected as necessary for coffee flavor. However, these UGTs and their action mechanisms are unknown in the Coffea genus. To obtain knowledge of terpene UGTs and elucidate the mechanism of terpene glycosylation in coffee, this study isolated terpene UGT genes and analyzed their functions. In silico screening based on the sequence of UGT85K11, which catalyzes terpene glycosylation from Camellia sinensis, was performed to obtain sequence information on five candidate UGT genes (CaUGT4, CaUGT5, CaUGT10, CaUGT15, and CaUGT20). These genes were isolated by reverse transcription-polymerase chain reaction, and the recombinant enzymes were produced with the Escherichia coli expression system. In functional analysis using radioisotopes, CaUGT4 showed critical activity against linalool, which had a higher affinity for its substrate than that of UGT85A84 from Osmanthus fragrans. Liquid chromatography-tandem mass spectrometry also revealed that CaUGT4 mainly produces linalyl glucoside. In this study, the first linalyl UGT was isolated from coffee. These findings can be used to elucidate the fundamental mechanism of the chemical defense in plants and apply aroma precursors for the plant-derived food industry in the future.
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Affiliation(s)
- Miho Ida
- Faculty of Bioresource Sciences, Akita Prefectural University, Akita City, Akita, 010-0195, Japan.
| | - Hiroko Kawakami
- Faculty of Bioresource Sciences, Akita Prefectural University, Akita City, Akita, 010-0195, Japan
| | - Kazuya Fukuhara
- Faculty of Bioresource Sciences, Akita Prefectural University, Akita City, Akita, 010-0195, Japan
| | - Kouichi Mizuno
- Faculty of Bioresource Sciences, Akita Prefectural University, Akita City, Akita, 010-0195, Japan.
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Bao X, Dong J, Niu M, Wang Z, Xu G. Transcriptome and Metabolome Analyses of Aroma Differences between Chardonnay and a Chardonnay Bud Sport. Molecules 2024; 29:3671. [PMID: 39125074 PMCID: PMC11314234 DOI: 10.3390/molecules29153671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2024] [Revised: 07/25/2024] [Accepted: 08/01/2024] [Indexed: 08/12/2024] Open
Abstract
Chardonnay is one of the most popular white grape wine varieties in the world, but this wine lacks typical aroma, considered a sensory defect. Our research group identified a Chardonnay bud sport with typical muscat characteristics. The goal of this work was to discover the key candidate genes related to muscat characteristics in this Chardonnay bud sport to reveal the mechanism of muscat formation and guide molecular design breeding. To this end, HS-SPME-GC-MS and RNA-Seq were used to analyze volatile organic compounds and the differentially expressed genes in Chardonnay and its aromatic bud sport. Forty-nine volatiles were identified as potential biomarkers, which included mainly aldehydes and terpenes. Geraniol, linalool, and phenylacetaldehyde were identified as the main aroma components of the mutant. The GO, KEGG, GSEA, and correlation analysis revealed HMGR, TPS1, TPS2, TPS5, novel.939, and CYP450 as key genes for terpene synthesis. MAO1 and MAO2 were significantly downregulated, but there was an increased content of phenylacetaldehyde. These key candidate genes provide a reference for the development of functional markers for muscat varieties and also provide insight into the formation mechanism of muscat aroma.
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Affiliation(s)
- Xiaoqin Bao
- College of Wine and Horticulture, Ningxia University, Yinchuan 750021, China; (X.B.); (J.D.); (M.N.)
| | - Jin Dong
- College of Wine and Horticulture, Ningxia University, Yinchuan 750021, China; (X.B.); (J.D.); (M.N.)
| | - Min Niu
- College of Wine and Horticulture, Ningxia University, Yinchuan 750021, China; (X.B.); (J.D.); (M.N.)
| | - Zhilei Wang
- College of Wine and Horticulture, Ningxia University, Yinchuan 750021, China; (X.B.); (J.D.); (M.N.)
- Engineering Research Center of Grape and Wine, Ministry of Education, Yinchuan 750021, China
- Ningxia Grape and Wine Engineering Technology Center, Yinchuan 750021, China
| | - Guoqian Xu
- College of Wine and Horticulture, Ningxia University, Yinchuan 750021, China; (X.B.); (J.D.); (M.N.)
- Engineering Research Center of Grape and Wine, Ministry of Education, Yinchuan 750021, China
- Ningxia Grape and Wine Engineering Technology Center, Yinchuan 750021, China
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Li X, Yan Y, Wang L, Li G, Wu Y, Zhang Y, Xu L, Wang S. Integrated Transcriptomic and Metabolomic Analysis Revealed Abscisic Acid-Induced Regulation of Monoterpene Biosynthesis in Grape Berries. PLANTS (BASEL, SWITZERLAND) 2024; 13:1862. [PMID: 38999702 PMCID: PMC11243831 DOI: 10.3390/plants13131862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 06/27/2024] [Accepted: 07/03/2024] [Indexed: 07/14/2024]
Abstract
Monoterpenes are a class of volatile organic compounds that play crucial roles in imparting floral and fruity aromas to Muscat-type grapes. However, our understanding of the regulatory mechanisms underpinning monoterpene biosynthesis in grapes, particularly following abscisic acid (ABA) treatment, remains elusive. This study aimed to explore the impact of exogenous ABA on monoterpene biosynthesis in Ruiduhongyu grape berries by employing Headspace Solid-Phase Micro-Extraction Gas Chromatography-Mass Spectrometry (HS-SPME/GC-MS) analysis and transcriptome sequencing. The results suggested significant differences in total soluble solids (TSS), pH, and total acid content. ABA treatment resulted in a remarkable increase in endogenous ABA levels, with concentrations declining from veraison to ripening stages. ABA treatment notably enhanced monoterpene concentrations, particularly at the E_L37 and E_L38 stages, elevating the overall floral aroma of grape berries. According to the variable gene expression patterns across four developmental stages in response to ABA treatment, the E_L37 stage had the largest number of differential expressed genes (DEGs), which was correlated with a considerable change in free monoterpenes. Furthermore, functional annotation indicated that the DEGs were significantly enriched in primary and secondary metabolic pathways, underlining the relationship between ABA, sugar accumulation, and monoterpene biosynthesis. ABA treatment upregulated key genes involved in the methylerythritol phosphate (MEP) pathway, enhancing carbon allocation and subsequently impacting terpene synthesis. This study also identified transcription factors, including MYB and AP2/ERF families, potentially modulating monoterpene and aroma-related genes. Weighted gene co-expression network analysis (WGCNA) linked ABA-induced gene expression to monoterpene accumulation, highlighting specific modules enriched with genes associated with monoterpene biosynthesis; one of these modules (darkgreen) contained genes highly correlated with most monoterpenes, emphasizing the role of ABA in enhancing grape quality during berry maturation. Together, these findings provide valuable insights into the multifaceted effects of exogenous ABA on monoterpene compounds and grape berry flavor development, offering potential applications in viticulture and enology.
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Affiliation(s)
- Xiangyi Li
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yixuan Yan
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lei Wang
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Guanhan Li
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yusen Wu
- Shandong Academy of Grape, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Ying Zhang
- Grape and Wine Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
| | - Lurong Xu
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shiping Wang
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
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Tian MB, Wang Y, Gao XT, Lu HC, Zhang Q, Han X, Li HQ, Shi N, Duan CQ, Wang J. Vineyard microclimate alterations induced by black inter-row mulch through transcriptome reshaped the flavoromics of cabernet sauvignon grapes. BMC PLANT BIOLOGY 2024; 24:258. [PMID: 38594637 PMCID: PMC11003005 DOI: 10.1186/s12870-024-04986-w] [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: 02/08/2024] [Accepted: 04/03/2024] [Indexed: 04/11/2024]
Abstract
BACKGROUND Weed control is essential for agricultural floor management in vineyards and the inter-row mulching is an eco-friendly practice to inhibit weed growth via filtering out photosynthetically active radiation. Besides weed suppression, inter-row mulching can influence grapevine growth and the accumulation of metabolites in grape berries. However, the complex interaction of multiple factors in the field challenges the understanding of molecular mechanisms on the regulated metabolites. In the current study, black geotextile inter-row mulch (M) was applied for two vintages (2016-2017) from anthesis to harvest. Metabolomics and transcriptomics analysis were conducted in two vintages, aiming to provide insights into metabolic and molecular responses of Cabernet Sauvignon grapes to M in a semi-arid climate. RESULTS Upregulation of genes related to photosynthesis and heat shock proteins confirmed that M weakened the total light exposure and grapes suffered heat stress, resulting in lower sugar-acid ratio at harvest. Key genes responsible for enhancements in phenylalanine, glutamine, ornithine, arginine, and C6 alcohol concentrations, and the downward trend in ε-viniferin, anthocyanins, flavonols, terpenes, and norisoprenoids in M grapes were identified. In addition, several modules significantly correlated with the metabolic biomarkers through weighted correlation network analysis, and the potential key transcription factors regulating the above metabolites including VviGATA11, VviHSFA6B, and VviWRKY03 were also identified. CONCLUSION This study provides a valuable overview of metabolic and transcriptomic responses of M grapes in semi-arid climates, which could facilitate understanding the complex regulatory network of metabolites in response to microclimate changes.
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Affiliation(s)
- Meng-Bo Tian
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, 100083, China
| | - Yu Wang
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Xiao-Tong Gao
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Hao-Cheng Lu
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, 100083, China
| | - Qi Zhang
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Xiao Han
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, 100083, China
| | - Hui-Qing Li
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, 100083, China
| | - Ning Shi
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, 100083, China
| | - Chang-Qing Duan
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, 100083, China
| | - Jun Wang
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China.
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, 100083, China.
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Wang YC, Wei Y, Li XY, Zhang HM, Meng X, Duan CQ, Pan QH. Ethylene-responsive VviERF003 modulates glycosylated monoterpenoid synthesis by upregulating VviGT14 in grapes. HORTICULTURE RESEARCH 2024; 11:uhae065. [PMID: 38689696 PMCID: PMC11059816 DOI: 10.1093/hr/uhae065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 02/18/2024] [Indexed: 05/02/2024]
Abstract
Terpenoids are important contributors to the aroma of grapes and wines. Grapes contain terpenoids in both volatile free form and non-volatile glycosidic form, with the latter being more abundant. Glycosylated terpenoids are deemed as latent aromatic potentials for their essential role in adding to the flowery and fruity bouquet of wines. However, the transcriptional regulatory mechanism underlying glycosylated terpenoid biosynthesis remains poorly understood. Our prior study identified an AP2/ERF transcription factor, VviERF003, through DNA pull-down screening using the promoter of terpenoid glycosyltransferase VviGT14 gene. This study demonstrated that both genes were co-expressed and synchronized with the accumulation of glycosylated monoterpenoids during grape maturation. VviERF003 can bind to the VviGT14 promoter and promote its activity according to yeast one-hybrid and dual-luciferase assays. VviERF003 upregulated VviGT14 expression in vivo, leading to increased production of glycosylated monoterpenoids based on the evidence from overexpression or RNA interference in leaves, berry skins, and calli of grapes, as well as tomato fruits. Additionally, VviERF003 and VviGT14 expressions and glycosylated monoterpenoid levels were induced by ethylene in grapes. The findings suggest that VviERF003 is ethylene-responsive and stimulates glycosylated monoterpenoid biosynthesis through upregulating VviGT14 expression.
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Affiliation(s)
- Ya-Chen Wang
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Yi Wei
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Xiang-Yi Li
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hui-Min Zhang
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Xiao Meng
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Chang-Qing Duan
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Qiu-Hong Pan
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
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Li L, Liu M, Bi H, Liu T. High-level production of Rhodiola rosea characteristic component rosavin from D-glucose and L-arabinose in engineered Escherichia coli. Metab Eng 2024; 82:274-285. [PMID: 38428730 DOI: 10.1016/j.ymben.2024.02.017] [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: 11/24/2023] [Revised: 02/04/2024] [Accepted: 02/26/2024] [Indexed: 03/03/2024]
Abstract
Rosavin is the characteristic component of Rhodiola rosea L., an important medicinal plant used widely in the world that has been reported to possess multiple biological activities. However, the endangered status of wild Rhodiola has limited the supply of rosavin. In this work, we successfully engineered an Escherichia coli strain to efficiently produce rosavin as an alternative production method. Firstly, cinnamate: CoA ligase from Hypericum calycinum, cinnamoyl-CoA reductase from Lolium perenne, and uridine diphosphate (UDP)-glycosyltransferase (UGT) from Bacillus subtilis (Bs-YjiC) were selected to improve the titer of rosin in E. coli. Subsequently, four UGTs from the UGT91R subfamily were identified to catalyze the formation of rosavin from rosin, with SlUGT91R1 from Solanum lycopersicum showing the highest activity level. Secondly, production of rosavin was achieved for the first time in E. coli by incorporating the SlUGT91R1 and UDP-arabinose pathway, including UDP-glucose dehydrogenase, UDP-xylose synthase, and UDP-xylose 4-epimerase, into the rosin-producing stain, and the titer reached 430.5 ± 91.4 mg/L. Thirdly, a two-step pathway derived from L-arabinose, composed of L-arabinokinase and UDP-sugar pyrophosphorylase, was developed in E. coli to further optimize the supply of the precursor UDP-arabinose. Furthermore, 1203.7 ± 32.1 mg/L of rosavin was produced from D-glucose and L-arabinose using shake-flask fermentation. Finally, the production of rosavin reached 7539.1 ± 228.7 mg/L by fed-batch fermentation in a 5-L bioreactor. Thus, the microbe-based production of rosavin shows great potential for commercialization. This work provides an effective strategy for the biosynthesis of other valuable natural products with arabinose-containing units from D-glucose and L-arabinose.
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Affiliation(s)
- Lijun Li
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230026, Anhui, China; Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Moshi Liu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; University of Chinese Academy of Sciences, Beijing, China
| | - Huiping Bi
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.
| | - Tao Liu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.
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Kaur G, Abugu M, Tieman D. The dissection of tomato flavor: biochemistry, genetics, and omics. FRONTIERS IN PLANT SCIENCE 2023; 14:1144113. [PMID: 37346138 PMCID: PMC10281629 DOI: 10.3389/fpls.2023.1144113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 05/02/2023] [Indexed: 06/23/2023]
Abstract
Flavor and quality are the major drivers of fruit consumption in the US. However, the poor flavor of modern commercial tomato varieties is a major cause of consumer dissatisfaction. Studies in flavor research have informed the role of volatile organic compounds in improving overall liking and sweetness of tomatoes. These studies have utilized and applied the tools of molecular biology, genetics, biochemistry, omics, machine learning, and gene editing to elucidate the compounds and biochemical pathways essential for good tasting fruit. Here, we discuss the progress in identifying the biosynthetic pathways and chemical modifications of important tomato volatile compounds. We also summarize the advances in developing highly flavorful tomato varieties and future steps toward developing a "perfect tomato".
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Affiliation(s)
- Gurleen Kaur
- Horticultural Sciences Department, University of Florida, Gainesville, FL, United States
| | - Modesta Abugu
- Department of Horticulture Science, North Carolina State University, Raleigh, NC, United States
| | - Denise Tieman
- Horticultural Sciences Department, University of Florida, Gainesville, FL, United States
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Palai G, Caruso G, Gucci R, D’Onofrio C. Water deficit before veraison is crucial in regulating berry VOCs concentration in Sangiovese grapevines. FRONTIERS IN PLANT SCIENCE 2023; 14:1117572. [PMID: 36890905 PMCID: PMC9986437 DOI: 10.3389/fpls.2023.1117572] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
The impact of water deficit on volatile organic compounds (VOCs) responsible for grape aroma remains quite unclear. The aim of this study was to evaluate the effect of different timing and intensity of water deficit on berry VOCs and on their biosynthetic pathways. Fully irrigated control vines were compared with the following treatments: i) two different levels of water deficit from berry pea-size through veraison, ii) one level of water deficit during the lag-phase, and iii) two different levels of water deficit from veraison through harvest. At harvest, total VOC concentrations were higher in berries of water stressed vines from berry pea size through veraison or during the lag phase, whereas post-veraison water deficit determined similar concentrations as control. This pattern was even more pronounced for the glycosylated fraction and was also observed for single compounds, mainly monoterpenes and C13-norisoprenoids. On the other hand, free VOCs were higher in berries from lag phase or post-veraison stressed vines. The significant glycosylated and free VOCs increment measured after the short water stress limited to the lag phase highlight the pivotal role played by this stage in berry aroma compound biosynthesis modulation. The severity of water stress before veraison was also important, since glycosylated VOCs showed a positive correlation with the pre-veraison daily water stress integral. The RNA-seq analysis showed a wide regulation induced by irrigation regimes on terpenes and carotenoids biosynthetic pathways. The terpene synthases and glycosyltransferases as well as genes of the network of transcription factors were upregulated, especially in berries from pre-veraison stressed vines. Since the timing and intensity of water deficit contribute to regulate berry VOCs, irrigation management can be used to achieve high-quality grapes while saving water.
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Affiliation(s)
| | | | | | - Claudio D’Onofrio
- Department of Agriculture Food and Environment, University of Pisa, Pisa, Italy
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Bosman RN, Lashbrooke JG. Grapevine mono- and sesquiterpenes: Genetics, metabolism, and ecophysiology. FRONTIERS IN PLANT SCIENCE 2023; 14:1111392. [PMID: 36818850 PMCID: PMC9936147 DOI: 10.3389/fpls.2023.1111392] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Mono- and sesquiterpenes are volatile organic compounds which play crucial roles in human perception of table grape and wine flavour and aroma, and as such their biosynthesis has received significant attention. Here, the biosynthesis of mono- and sesquiterpenes in grapevine is reviewed, with a specific focus on the metabolic pathways which lead to formation of these compounds, and the characterised genetic variation underlying modulation of this metabolism. The bottlenecks for terpene precursor formation in the cytosol and plastid are understood to be the HMG-CoA reductase (HMGR) and 1-deoxy-D-xylylose-5-phosphate synthase (DXS) enzymes, respectively, and lead to the formation of prenyldiphosphate precursors. The functional plasticity of the terpene synthase enzymes which act on the prenyldiphosphate precursors allows for the massive variation in observed terpene product accumulation. This diversity is further enhanced in grapevine by significant duplication of genes coding for structurally diverse terpene synthases. Relatively minor nucleotide variations are sufficient to influence both product and substrate specificity of terpene synthase genes, with these variations impacting cultivar-specific aroma profiles. While the importance of these compounds in terms of grape quality is well documented, they also play several interesting roles in the grapevine's ecophysiological interaction with its environment. Mono- and sesquiterpenes are involved in attraction of pollinators, agents of seed dispersal and herbivores, defence against fungal infection, promotion of mutualistic rhizobacteria interaction, and are elevated in conditions of high light radiation. The ever-increasing grapevine genome sequence data will potentially allow for future breeders and biotechnologists to tailor the aroma profiles of novel grapevine cultivars through exploitation of the significant genetic variation observed in terpene synthase genes.
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Zhang S, Qu-Bie JZ, Feng MK, Qu-Bie AX, Huang Y, Zhang ZF, Yan XJ, Liu Y. Illuminating the biosynthesis pathway genes involved in bioactive specific monoterpene glycosides in Paeonia veitchii Lynch by a combination of sequencing platforms. BMC Genomics 2023; 24:45. [PMID: 36698081 PMCID: PMC9878870 DOI: 10.1186/s12864-023-09138-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 01/16/2023] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Paeonia veitchii Lynch, a well-known herb from the Qinghai-Tibet Plateau south of the Himalayas, can synthesize specific monoterpene glycosides (PMGs) with multiple pharmacological activities, and its rhizome has become an indispensable ingredient in many clinical drugs. However, little is known about the molecular background of P. veitchii, especially the genes involved in the biosynthetic pathway of PMGs. RESULTS A corrective full-length transcriptome with 30,827 unigenes was generated by combining next-generation sequencing (NGS) and single-molecule real-time sequencing (SMRT) of six tissues (leaf, stem, petal, ovary, phloem and xylem). The enzymes terpene synthase (TPS), cytochrome P450 (CYP), UDP-glycosyltransferase (UGT), and BAHD acyltransferase, which participate in the biosynthesis of PMGs, were systematically characterized, and their functions related to PMG biosynthesis were analysed. With further insight into TPSs, CYPs, UGTs and BAHDs involved in PMG biosynthesis, the weighted gene coexpression network analysis (WGCNA) method was used to identify the relationships between these genes and PMGs. Finally, 8 TPSs, 22 CYPs, 7 UGTs, and 2 BAHD genes were obtained, and these putative genes were very likely to be involved in the biosynthesis of PMGs. In addition, the expression patterns of the putative genes and the accumulation of PMGs in tissues suggested that all tissues are capable of biosynthesizing PMGs and that aerial plant parts could also be used to extract PMGs. CONCLUSION We generated a large-scale transcriptome database across the major tissues in P. veitchii, providing valuable support for further research investigating P. veitchii and understanding the genetic information of plants from the Qinghai-Tibet Plateau. TPSs, CYPs, UGTs and BAHDs further contribute to a better understanding of the biology and complexity of PMGs in P. veitchii. Our study will help reveal the mechanisms underlying the biosynthesis pathway of these specific monoterpene glycosides and aid in the comprehensive utilization of this multifunctional plant.
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Affiliation(s)
- Shaoshan Zhang
- Tibetan Plateau Ethnic Medicinal Resources Protection and Utilization Key Laboratory of National Ethnic Affairs Commission of the People’s Republic of China, Chengdu, 610225 China ,Sichuan Provincial Qiang-Yi Medicinal Resources Protection and Utilization Technology and Engineering Laboratory, Chengdu, 610225 China
| | - Jun-zhang Qu-Bie
- grid.412723.10000 0004 0604 889XCollege of Pharmacy, Southwest Minzu University, Chengdu, 610041 China
| | - Ming-kang Feng
- grid.412723.10000 0004 0604 889XCollege of Pharmacy, Southwest Minzu University, Chengdu, 610041 China
| | - A-xiang Qu-Bie
- grid.412723.10000 0004 0604 889XCollege of Pharmacy, Southwest Minzu University, Chengdu, 610041 China
| | - Yanfei Huang
- Tibetan Plateau Ethnic Medicinal Resources Protection and Utilization Key Laboratory of National Ethnic Affairs Commission of the People’s Republic of China, Chengdu, 610225 China ,Sichuan Provincial Qiang-Yi Medicinal Resources Protection and Utilization Technology and Engineering Laboratory, Chengdu, 610225 China
| | - Zhi-feng Zhang
- Tibetan Plateau Ethnic Medicinal Resources Protection and Utilization Key Laboratory of National Ethnic Affairs Commission of the People’s Republic of China, Chengdu, 610225 China ,Sichuan Provincial Qiang-Yi Medicinal Resources Protection and Utilization Technology and Engineering Laboratory, Chengdu, 610225 China
| | - Xin-jia Yan
- Tibetan Plateau Ethnic Medicinal Resources Protection and Utilization Key Laboratory of National Ethnic Affairs Commission of the People’s Republic of China, Chengdu, 610225 China ,Sichuan Provincial Qiang-Yi Medicinal Resources Protection and Utilization Technology and Engineering Laboratory, Chengdu, 610225 China
| | - Yuan Liu
- Sichuan Provincial Qiang-Yi Medicinal Resources Protection and Utilization Technology and Engineering Laboratory, Chengdu, 610225 China
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11
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Transcriptomic and metabolic analyses reveal differences in monoterpene profiles and the underlying molecular mechanisms in six grape varieties with different flavors. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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12
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Huang FC, Effenberger I, Fischer T, Hahn IL, Hoffmann T, Schwab W. Comparative Physicochemical and Biochemical Characterization of Small-Molecule Glucosides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:15972-15980. [PMID: 36475669 DOI: 10.1021/acs.jafc.2c07312] [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: 06/17/2023]
Abstract
Glycosylation of small molecules can significantly improve their physicochemical and biological properties. Only recently, decisive improvements in the biotechnological production of small-molecule glucosides (SMGs) have resulted in a large number of these compounds now being commercially available. In this study, we have analyzed a number of physical, chemical, and biological parameters of 31 SMGs, including solubility, stability, melting and pyrolysis points, partition coefficient log P, minimum inhibitory concentration against Escherichia coli (MIC), and enzymatic degradability. The properties such as water solubility, pH stability, and MICs of the glycosides were strongly dependent on the structures of the respective aglycones, which is why the SMG clustered according to their aglycones in most cases. Phenolic and furanone glucosides were readily hydrolyzed by saliva and skin microflora, whereas monoterpenol glycosides were poorer substrates for the enzymes involved. The results of this comparative analysis of SMGs provide valuable information for elucidating the biological functions of SMGs and the future technological applications of these useful natural products.
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Affiliation(s)
| | | | - Thilo Fischer
- 4GENE, Lise-Meitner-Str. 30, 85354 Freising, Germany
| | - Isabella-Louisa Hahn
- Biotechnology of Natural Products, Technical University Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technical University Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technical University Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
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13
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Dudley QM, Jo S, Guerrero DAS, Chhetry M, Smedley MA, Harwood WA, Sherden NH, O'Connor SE, Caputi L, Patron NJ. Reconstitution of monoterpene indole alkaloid biosynthesis in genome engineered Nicotiana benthamiana. Commun Biol 2022; 5:949. [PMID: 36088516 PMCID: PMC9464250 DOI: 10.1038/s42003-022-03904-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 08/25/2022] [Indexed: 12/17/2022] Open
Abstract
Monoterpene indole alkaloids (MIAs) are a diverse class of plant natural products that include a number of medicinally important compounds. We set out to reconstitute the pathway for strictosidine, a key intermediate of all MIAs, from central metabolism in Nicotiana benthamiana. A disadvantage of this host is that its rich background metabolism results in the derivatization of some heterologously produced molecules. Here we use transcriptomic analysis to identify glycosyltransferases that are upregulated in response to biosynthetic intermediates and produce plant lines with targeted mutations in the genes encoding them. Expression of the early MIA pathway in these lines produces a more favorable product profile. Strictosidine biosynthesis was successfully reconstituted, with the best yields obtained by the co-expression of 14 enzymes, of which a major latex protein-like enzyme (MLPL) from Nepeta (catmint) is critical for improving flux through the iridoid pathway. The removal of endogenous glycosyltransferases does not impact the yields of strictosidine, highlighting that the metabolic flux of the pathway enzymes to a stable biosynthetic intermediate minimizes the need to engineer the endogenous metabolism of the host. The production of strictosidine in planta expands the range of MIA products amenable to biological synthesis.
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Affiliation(s)
- Quentin M Dudley
- Engineering Biology, Earlham Institute, Norwich Research Park, Norwich, Norfolk, NR4 7UZ, UK
| | - Seohyun Jo
- Engineering Biology, Earlham Institute, Norwich Research Park, Norwich, Norfolk, NR4 7UZ, UK
| | - Delia Ayled Serna Guerrero
- Department of Natural Product Biosynthesis, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany
| | - Monika Chhetry
- John Innes Centre, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Mark A Smedley
- John Innes Centre, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Wendy A Harwood
- John Innes Centre, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Nathaniel H Sherden
- John Innes Centre, Norwich Research Park, Norwich, NR4 7TJ, UK
- Octagon Therapeutics Ltd, 700 Main Street, North Cambridge, MA, 02139, USA
| | - Sarah E O'Connor
- Department of Natural Product Biosynthesis, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany
| | - Lorenzo Caputi
- Department of Natural Product Biosynthesis, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany.
| | - Nicola J Patron
- Engineering Biology, Earlham Institute, Norwich Research Park, Norwich, Norfolk, NR4 7UZ, UK.
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14
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The Expression of Aroma Components and Related Genes in Merlot and Marselan Scion-Rootstock Grape and Wine. Foods 2022; 11:foods11182777. [PMID: 36140906 PMCID: PMC9497891 DOI: 10.3390/foods11182777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/13/2022] [Accepted: 09/05/2022] [Indexed: 11/16/2022] Open
Abstract
Rootstocks were bred and selected from several species in order to enhance the resistance against biotic or abiotic stresses. There are few studies on the effect of rootstocks on aroma and related gene expression. This study focused on the effects of three rootstocks, Kober 5BB (5BB), 1103 Paulsen (1103P), and Selection Oppenheim (SO4), on the aroma and volatile-related gene expression levels of Merlot and Marselan berries and wines. These three rootstocks reduced the total aroma content of Merlot wine. 5BB upregulated VvLoXA and showed increased C6 alcohols. 1103P enhanced the linalool from Merlot berry, with marked upregulation of VvLinNer1. Conversely, rootstocks increased the total aroma content of Marselan berry, verified by the related expression levels of volatile-related genes. For Marselan berry, 5BB and 1103P upregulated five VvGTs and nine genes from the LOX and MEP pathway. 1103P increased the contents of C6 alcohols, C6 aldehydes, and citronellol from Marselan berry. Compared to 5BB and SO4, rootstock 1103P provided berries of better quality and richer aroma volatiles to Merlot and Marselan, while all three of the rootstocks had a significant effect on scion–rootstocks.
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15
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Rhee KY, Jansen RS, Grundner C. Activity-based annotation: the emergence of systems biochemistry. Trends Biochem Sci 2022; 47:785-794. [PMID: 35430135 PMCID: PMC9378515 DOI: 10.1016/j.tibs.2022.03.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/10/2022] [Accepted: 03/22/2022] [Indexed: 01/21/2023]
Abstract
Current tools to annotate protein function have failed to keep pace with the speed of DNA sequencing and exponentially growing number of proteins of unknown function (PUFs). A major contributing factor to this mismatch is the historical lack of high-throughput methods to experimentally determine biochemical activity. Activity-based methods, such as activity-based metabolite and protein profiling, are emerging as new approaches for unbiased, global, biochemical annotation of protein function. In this review, we highlight recent experimental, activity-based approaches that offer new opportunities to determine protein function in a biologically agnostic and systems-level manner.
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Affiliation(s)
- Kyu Y Rhee
- Department of Medicine, Weill Cornell Medical College, New York, NY, USA.
| | - Robert S Jansen
- Department of Microbiology, Radboud University, Nijmegen, The Netherlands.
| | - Christoph Grundner
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, USA; Department of Global Health, University of Washington, Seattle, WA, USA; Department of Pediatrics, University of Washington, Seattle, WA, USA.
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16
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Caffrey AJ, Lafontaine S, Dailey J, Varnum S, Lerno LA, Zweigenbaum J, Heymann H, Ebeler SE. Characterization of Humulus lupulus glycosides with porous graphitic carbon and sequential high performance liquid chromatography quadrupole time-of-flight mass spectrometry and high performance liquid chromatography fractionation. J Chromatogr A 2022; 1674:463130. [DOI: 10.1016/j.chroma.2022.463130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 05/05/2022] [Accepted: 05/06/2022] [Indexed: 11/27/2022]
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17
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Caffrey AJ, Lerno LA, Zweigenbaum J, Ebeler SE. Characterization of Free and Bound Monoterpene Alcohols during Riesling Fermentation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:13286-13298. [PMID: 34213324 DOI: 10.1021/acs.jafc.1c01216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The isomeric nature of monoterpenyl glycosides makes unambiguous identification of intact glycosides difficult. As a result, it is challenging to relate the changes in free monoterpenol concentrations to the corresponding glycosides during wine fermentation and storage. In this study, we isolated and identified linalool, nerol, and geraniol monoterpenyl glycosides fromVitis viniferacv. Riesling grapes through fractionation followed by acid or enzyme hydrolysis. Changes in the composition of identified monoterpenyl glycosides and their respective free volatiles were then monitored during alcoholic fermentations of Riesling juice with four different yeast strains across two successive years. The relative concentrations of the volatiles were monitored by solid-phase microextraction gas chromatography mass spectrometry, while ultrahigh-performance liquid chromatography quadrupole time-of-flight mass spectrometry was used for intact glycosides. Glycoside hydrolysis during fermentation could be related to relative concentrations of the corresponding free aglycones. However, other sources of free monoterpenols were also observed. Differences in glycoside hydrolysis among yeast strains and across years were observed and may be related to grape maturity and/or nutrient levels.
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Affiliation(s)
- Andrew J Caffrey
- Department of Viticulture and Enology, University of California, Davis, Davis, California 95616, United States
- Food Safety and Measurement Facility, University of California, Davis, Davis, California 95616, United States
| | - Larry A Lerno
- Department of Viticulture and Enology, University of California, Davis, Davis, California 95616, United States
- Food Safety and Measurement Facility, University of California, Davis, Davis, California 95616, United States
| | - Jerry Zweigenbaum
- Agilent Technologies, Incorporated Wilmington, Delaware 19808, United States
| | - Susan E Ebeler
- Department of Viticulture and Enology, University of California, Davis, Davis, California 95616, United States
- Food Safety and Measurement Facility, University of California, Davis, Davis, California 95616, United States
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18
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Kurze E, Ruß V, Syam N, Effenberger I, Jonczyk R, Liao J, Song C, Hoffmann T, Schwab W. Glucosylation of (±)-Menthol by Uridine-Diphosphate-Sugar Dependent Glucosyltransferases from Plants. Molecules 2021; 26:5511. [PMID: 34576983 PMCID: PMC8470988 DOI: 10.3390/molecules26185511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 11/17/2022] Open
Abstract
Menthol is a cyclic monoterpene alcohol of the essential oils of plants of the genus Mentha, which is in demand by various industries due to its diverse sensorial and physiological properties. However, its poor water solubility and its toxic effect limit possible applications. Glycosylation offers a solution as the binding of a sugar residue to small molecules increases their water solubility and stability, renders aroma components odorless and modifies bioactivity. In order to identify plant enzymes that catalyze this reaction, a glycosyltransferase library containing 57 uridine diphosphate sugar-dependent enzymes (UGTs) was screened with (±)-menthol. The identity of the products was confirmed by mass spectrometry and nuclear magnetic resonance spectroscopy. Five enzymes were able to form (±)-menthyl-β-d-glucopyranoside in whole-cell biotransformations: UGT93Y1, UGT93Y2, UGT85K11, UGT72B27 and UGT73B24. In vitro enzyme activity assays revealed highest catalytic activity for UGT93Y1 (7.6 nkat/mg) from Camellia sinensis towards menthol and its isomeric forms. Although UGT93Y2 shares 70% sequence identity with UGT93Y1, it was less efficient. Of the five enzymes, UGT93Y1 stood out because of its high in vivo and in vitro biotransformation rate. The identification of novel menthol glycosyltransferases from the tea plant opens new perspectives for the biotechnological production of menthyl glucoside.
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Affiliation(s)
- Elisabeth Kurze
- Biotechnology of Natural Products, School of Life Sciences, Technical University of Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany; (E.K.); (V.R.); (N.S.); (R.J.); (J.L.); (T.H.)
| | - Victoria Ruß
- Biotechnology of Natural Products, School of Life Sciences, Technical University of Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany; (E.K.); (V.R.); (N.S.); (R.J.); (J.L.); (T.H.)
| | - Nadia Syam
- Biotechnology of Natural Products, School of Life Sciences, Technical University of Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany; (E.K.); (V.R.); (N.S.); (R.J.); (J.L.); (T.H.)
| | | | - Rafal Jonczyk
- Biotechnology of Natural Products, School of Life Sciences, Technical University of Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany; (E.K.); (V.R.); (N.S.); (R.J.); (J.L.); (T.H.)
| | - Jieren Liao
- Biotechnology of Natural Products, School of Life Sciences, Technical University of Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany; (E.K.); (V.R.); (N.S.); (R.J.); (J.L.); (T.H.)
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei 230036, China;
| | - Thomas Hoffmann
- Biotechnology of Natural Products, School of Life Sciences, Technical University of Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany; (E.K.); (V.R.); (N.S.); (R.J.); (J.L.); (T.H.)
| | - Wilfried Schwab
- Biotechnology of Natural Products, School of Life Sciences, Technical University of Munich, Liesel-Beckmann-Str. 1, 85354 Freising, Germany; (E.K.); (V.R.); (N.S.); (R.J.); (J.L.); (T.H.)
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19
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Kurze E, Wüst M, Liao J, McGraphery K, Hoffmann T, Song C, Schwab W. Structure-function relationship of terpenoid glycosyltransferases from plants. Nat Prod Rep 2021; 39:389-409. [PMID: 34486004 DOI: 10.1039/d1np00038a] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Covering: up to 2021Terpenoids are physiologically active substances that are of great importance to humans. Their physicochemical properties are modified by glycosylation, in terms of polarity, volatility, solubility and reactivity, and their bioactivities are altered accordingly. Significant scientific progress has been made in the functional study of glycosylated terpenes and numerous plant enzymes involved in regio- and enantioselective glycosylation have been characterized, a reaction that remains chemically challenging. Crucial clues to the mechanism of terpenoid glycosylation were recently provided by the first crystal structures of a diterpene glycosyltransferase UGT76G1. Here, we review biochemically characterized terpenoid glycosyltransferases, compare their functions and primary structures, discuss their acceptor and donor substrate tolerance and product specificity, and elaborate features of the 3D structures of the first terpenoid glycosyltransferases from plants.
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Affiliation(s)
- Elisabeth Kurze
- Biotechnology of Natural Products, TUM School of Life Sciences, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany.
| | - Matthias Wüst
- Chair of Food Chemistry, Institute of Nutritional and Food Sciences, University of Bonn, Endenicher Allee 19C, 53115 Bonn, Germany.
| | - Jieren Liao
- Biotechnology of Natural Products, TUM School of Life Sciences, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany.
| | - Kate McGraphery
- Biotechnology of Natural Products, TUM School of Life Sciences, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany.
| | - Thomas Hoffmann
- Biotechnology of Natural Products, TUM School of Life Sciences, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany.
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University Hefei, Anhui 230036, People's Republic of China.
| | - Wilfried Schwab
- Biotechnology of Natural Products, TUM School of Life Sciences, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany. .,State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University Hefei, Anhui 230036, People's Republic of China.
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20
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Gutensohn M, Henry LK, Gentry SA, Lynch JH, Nguyen TTH, Pichersky E, Dudareva N. Overcoming Bottlenecks for Metabolic Engineering of Sesquiterpene Production in Tomato Fruits. FRONTIERS IN PLANT SCIENCE 2021; 12:691754. [PMID: 34220915 PMCID: PMC8248349 DOI: 10.3389/fpls.2021.691754] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 05/17/2021] [Indexed: 06/13/2023]
Abstract
Terpenoids are a large and diverse class of plant metabolites that also includes volatile mono- and sesquiterpenes which are involved in biotic interactions of plants. Due to the limited natural availability of these terpenes and the tight regulation of their biosynthesis, there is strong interest to introduce or enhance their production in crop plants by metabolic engineering for agricultural, pharmaceutical and industrial applications. While engineering of monoterpenes has been quite successful, expression of sesquiterpene synthases in engineered plants frequently resulted in production of only minor amounts of sesquiterpenes. To identify bottlenecks for sesquiterpene engineering in plants, we have used two nearly identical terpene synthases, snapdragon (Antirrhinum majus) nerolidol/linalool synthase-1 and -2 (AmNES/LIS-1/-2), that are localized in the cytosol and plastids, respectively. Since these two bifunctional terpene synthases have very similar catalytic properties with geranyl diphosphate (GPP) and farnesyl diphosphate (FPP), their expression in target tissues allows indirect determination of the availability of these substrates in both subcellular compartments. Both terpene synthases were expressed under control of the ripening specific PG promoter in tomato fruits, which are characterized by a highly active terpenoid metabolism providing precursors for carotenoid biosynthesis. As AmNES/LIS-2 fruits produced the monoterpene linalool, AmNES/LIS-1 fruits were found to exclusively produce the sesquiterpene nerolidol. While nerolidol emission in AmNES/LIS-1 fruits was 60- to 584-fold lower compared to linalool emission in AmNES/LIS-2 fruits, accumulation of nerolidol-glucosides in AmNES/LIS-1 fruits was 4- to 14-fold lower than that of linalool-glucosides in AmNES/LIS-2 fruits. These results suggest that only a relatively small pool of FPP is available for sesquiterpene formation in the cytosol. To potentially overcome limitations in sesquiterpene production, we transiently co-expressed the key pathway-enzymes hydroxymethylglutaryl-CoA reductase (HMGR) and 1-deoxy-D-xylulose 5-phosphate synthase (DXS), as well as the regulator isopentenyl phosphate kinase (IPK). While HMGR and IPK expression increased metabolic flux toward nerolidol formation 5.7- and 2.9-fold, respectively, DXS expression only resulted in a 2.5-fold increase.
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Affiliation(s)
- Michael Gutensohn
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV, United States
| | - Laura K. Henry
- Department of Biochemistry, Purdue University, West Lafayette, IN, United States
| | - Scott A. Gentry
- Department of Biochemistry, Purdue University, West Lafayette, IN, United States
| | - Joseph H. Lynch
- Department of Biochemistry, Purdue University, West Lafayette, IN, United States
- Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, United States
| | - Thuong T. H. Nguyen
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, United States
| | - Eran Pichersky
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, United States
| | - Natalia Dudareva
- Department of Biochemistry, Purdue University, West Lafayette, IN, United States
- Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, United States
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, United States
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21
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Caffrey A, Ebeler SE. The Occurrence of Glycosylated Aroma Precursors in Vitis vinifera Fruit and Humulus lupulus Hop Cones and Their Roles in Wine and Beer Volatile Aroma Production. Foods 2021; 10:935. [PMID: 33923228 PMCID: PMC8146117 DOI: 10.3390/foods10050935] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/02/2021] [Accepted: 04/22/2021] [Indexed: 12/02/2022] Open
Abstract
Volatile aroma compounds found in grapes and hops may be present as both free volatiles and bound glycosides. Glycosides found in the raw materials are transferred to their respective fermented beverages during production where the odorless compounds may act as a reservoir of free volatiles that may be perceived by the consumer if hydrolyzed. A review of the literature on grape and wine glycosides and the emerging literature for glycosides in hops is presented in order to demonstrate the depth of history in grape glycoside research and may help direct new research on hop glycosides. Focus is brought to the presence of glycosides in the raw materials, the effect that winemaking and brewing have on glycoside levels, and current methods for the analysis of glycosidically linked aroma compounds.
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Affiliation(s)
- Andrew Caffrey
- Department of Viticulture and Enology, University of California, Davis, CA 95616, USA;
- Food Safety and Measurement Facility, University of California, Davis, CA 95616, USA
| | - Susan E. Ebeler
- Department of Viticulture and Enology, University of California, Davis, CA 95616, USA;
- Food Safety and Measurement Facility, University of California, Davis, CA 95616, USA
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22
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Sun G, Putkaradze N, Bohnacker S, Jonczyk R, Fida T, Hoffmann T, Bernhardt R, Härtl K, Schwab W. Six Uridine-Diphosphate Glycosyltransferases Catalyze the Glycosylation of Bioactive C 13-Apocarotenols. PLANT PHYSIOLOGY 2020; 184:1744-1761. [PMID: 33020252 PMCID: PMC7723086 DOI: 10.1104/pp.20.00953] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 09/23/2020] [Indexed: 05/03/2023]
Abstract
C13-apocarotenoids (norisoprenoids) are carotenoid-derived oxidation products that perform important physiological functions in plants. Although their biosynthetic pathways have been extensively studied, their metabolism including glycosylation remains poorly understood. Candidate uridine-diphosphate glycosyltransferase genes (UGTs) were selected based on their high transcript abundance in comparison with other UGTs in vegetative tissues of Nicotiana benthamiana and peppermint (Mentha × piperita), as these tissues are rich sources of apocarotenoid glucosides. Hydroxylated C13-apocarotenol substrates were produced by P450-catalyzed biotransformation and microbial/plant enzyme systems were established for the synthesis of glycosides. Natural substrates were identified by physiological aglycone libraries prepared from isolated plant glycosides. In total, we identified six UGTs that catalyze the glucosylation of C13-apocarotenols, where Glc is bound either to the cyclohexene ring or the butane side chain. MpUGT86C10 is a superior novel enzyme that catalyzes the glucosylation of allelopathic 3-hydroxy-α-damascone, 3-oxo-α-ionol, 3-oxo-7,8-dihydro-α-ionol (Blumenol C), and 3-hydroxy-7,8-dihydro-β-ionol, whereas a germination test demonstrated the higher phytotoxic potential of a norisoprenoid glucoside in comparison to its aglycone. Glycosylation of C13-apocarotenoids has several functions in plants, including increased allelopathic activity of the aglycone, facilitating exudation by roots and allowing symbiosis with arbuscular mycorrhizal fungi. The results enable in-depth analysis of the roles of glycosylated norisoprenoid allelochemicals, the physiological functions of apocarotenoids during arbuscular mycorrhizal colonization, and the associated maintenance of carotenoid homeostasis.
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Affiliation(s)
- Guangxin Sun
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
| | - Natalia Putkaradze
- Institut für Biochemie, Universität des Saarlandes, D-66123 Saarbrücken, Germany
| | - Sina Bohnacker
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
| | - Rafal Jonczyk
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
| | - Tarik Fida
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
| | - Rita Bernhardt
- Institut für Biochemie, Universität des Saarlandes, D-66123 Saarbrücken, Germany
| | - Katja Härtl
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
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23
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Wu B, Liu X, Xu K, Zhang B. Genome-wide characterization, evolution and expression profiling of UDP-glycosyltransferase family in pomelo (Citrus grandis) fruit. BMC PLANT BIOLOGY 2020; 20:459. [PMID: 33028214 PMCID: PMC7542425 DOI: 10.1186/s12870-020-02655-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/20/2020] [Indexed: 05/31/2023]
Abstract
BACKGROUND Pomelo is one of the three major species of citrus. The fruit accumulates a variety of abundant secondary metabolites that affect the flavor. UDP-glycosyltransferases (UGTs) are involved in the glycosylation of secondary metabolites. RESULTS In the present study, we performed a genome-wide analysis of pomelo UGT family, a total of 145 UGTs was identified based on the conserved plant secondary product glycosyltransferase (PSPG) motif. These UGT genes were clustered into 16 major groups through phylogenetic analysis of these genes with other plant UGTs (A-P). Pomelo UGTs were distributed unevenly among the chromosomes. At least 10 intron insertion events were observed in these UGT genome sequences, and I-5 was identified to be the highest conserved one. The expression profile analysis of pomelo UGT genes in different fruit tissues during development and ripening was carried out by RNA-seq. CONCLUSIONS We identified 145 UGTs in pomelo fruit through transcriptome data and citrus genome database. Our research provides available information on UGTs studies in pomelo, and provides an important research foundation for screening and identification of functional UGT genes.
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Affiliation(s)
- Boping Wu
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agriculture and Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, China
| | - Xiaohong Liu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology / Laboratory of Fruit Quality Biology, Zhejiang University, Hangzhou, 310058, China
| | - Kai Xu
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agriculture and Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, China.
| | - Bo Zhang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology / Laboratory of Fruit Quality Biology, Zhejiang University, Hangzhou, 310058, China.
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24
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Schieber A, Wüst M. Volatile Phenols-Important Contributors to the Aroma of Plant-Derived Foods. Molecules 2020; 25:molecules25194529. [PMID: 33023270 PMCID: PMC7582606 DOI: 10.3390/molecules25194529] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/26/2020] [Accepted: 09/30/2020] [Indexed: 11/16/2022] Open
Abstract
Volatile phenols like phenylpropanoid and benzoid compounds originate from the aromatic amino acid phenylalanine, which is biosynthesized via the shikimate/arogenate pathway. These volatile compounds contribute to the aroma of a number of economically important plant-derived foods like herbs, spices and fruits. The sequestration of numerous phenylpropanoid and benzoid compounds as glycosides occurs widely in fruits, and this pool represents an important source of flavor that can be released during storage and processing. Therefore, this review will provide an overview of the biosynthesis of free and glycosylated phenylpropanoid and benzoid compounds and their reactions during food processing, which both lead to the generation of odor-active volatile phenols in plant-derived foods.
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Affiliation(s)
- Andreas Schieber
- Chair of Molecular Food Technology, Institute of Nutritional and Food Sciences, University of Bonn, Endenicher Allee 19B, 53115 Bonn, Germany;
| | - Matthias Wüst
- Chair of Food Chemistry, Institute of Nutritional and Food Sciences, University of Bonn, Endenicher Allee 19B, 53115 Bonn, Germany
- Correspondence: ; Tel.: +49-228-73-2361
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25
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Kovalenko Y, Tindjau R, Madilao LL, Castellarin SD. Regulated deficit irrigation strategies affect the terpene accumulation in Gewürztraminer (Vitis vinifera L.) grapes grown in the Okanagan Valley. Food Chem 2020; 341:128172. [PMID: 33039736 DOI: 10.1016/j.foodchem.2020.128172] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 09/19/2020] [Accepted: 09/20/2020] [Indexed: 01/19/2023]
Abstract
Regulated deficit irrigation (RDI) is a viticultural practice known to improve grape phenolics and color in red grapes; however, the impact of this practice on grape aromas remains largely unknown. The effects of RDI treatments applied at various berry developmental stages on canopy, yield, and free and glycoside-bound terpenes of the berry were investigated for three consecutive seasons. All RDI treatments reduced leaf photosynthesis and yield, but not when applied after veraison. Berry total soluble solids at harvest were reduced by RDI applied after veraison or throughout the season. Despite reducing berry sugars, RDI applied after veraison increased the concentration at harvest of key free terpenes for Gewürztraminer grapes such as geraniol and citronellol. RDI treatments down-regulated some terpene genes, which indicates that the observed changes in terpene concentration were not transcriptionally regulated. This study suggests that RDI applied after version can potentially improve wine aroma in Gewürztraminer.
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Affiliation(s)
- Yevgen Kovalenko
- Wine Research Centre, The University of British Columbia, 2205 East Mall, Vancouver, BC V6T 1Z4, Canada
| | - Ricco Tindjau
- Wine Research Centre, The University of British Columbia, 2205 East Mall, Vancouver, BC V6T 1Z4, Canada
| | - Lufiani Lina Madilao
- Wine Research Centre, The University of British Columbia, 2205 East Mall, Vancouver, BC V6T 1Z4, Canada
| | - Simone Diego Castellarin
- Wine Research Centre, The University of British Columbia, 2205 East Mall, Vancouver, BC V6T 1Z4, Canada.
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26
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Liang Z, Fang Z, Pai A, Luo J, Gan R, Gao Y, Lu J, Zhang P. Glycosidically bound aroma precursors in fruits: A comprehensive review. Crit Rev Food Sci Nutr 2020; 62:215-243. [PMID: 32880480 DOI: 10.1080/10408398.2020.1813684] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Fruit aroma is mainly contributed by free and glycosidically bound aroma compounds, in which glycosidically bound form can be converted into free form during storage and processing, thereby enhancing the overall aroma property. In recent years, the bound aroma precursors have been widely used as flavor additives in the food industry to enhance, balance and recover the flavor of products. This review summarizes the fruit-derived aroma glycosides in different aspects including chemical structures, enzymatic hydrolysis, biosynthesis and occurrence. Aroma glycosides structurally involve an aroma compound (aglycone) and a sugar moiety (glycone). They can be hydrolyzed to release free volatiles by endo- and/or exo-glucosidase, while their biosynthesis refers to glycosylation process using glycosyltransferases (GTs). So far, aroma glycosides have been found and studied in multiple fruits such as grapes, mangoes, lychees and so on. Additionally, their importance in flavor perception, their utilization in food flavor enhancement and other industrial applications are also discussed. Aroma glycosides can enhance flavor perception via hydrolyzation by β-glucosidase in human saliva. Moreover, they are able to impart product flavor by controlling the liberation of active volatiles in industrial applications. This review provides fundamental information for the future investigation on the fruit-derived aroma glycosides.
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Affiliation(s)
- Zijian Liang
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Zhongxiang Fang
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Ahalya Pai
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Jiaqiang Luo
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Renyou Gan
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China
| | - Yu Gao
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Jiang Lu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Pangzhen Zhang
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, Australia
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27
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Koeduka T, Ueyama Y, Kitajima S, Ohnishi T, Matsui K. Molecular cloning and characterization of UDP-glucose: Volatile benzenoid/phenylpropanoid glucosyltransferase in petunia flowers. JOURNAL OF PLANT PHYSIOLOGY 2020; 252:153245. [PMID: 32750644 DOI: 10.1016/j.jplph.2020.153245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 06/11/2023]
Abstract
Volatile benzenoids/phenylpropanoids are characteristic scent compounds in petunia flowers and are reported to be stored as glycosides in the vacuoles of petal cells. Here, we used transcriptomics and co-expression approaches with volatile benzenoid/phenylpropanoid biosynthetic genes to identify three petunia genes (UGT85A96, UGT85A97, and UGT85A98) encoding UDP-glycosyltransferase. The analyses of spatiotemporal gene expression revealed that all UGT85 genes were highly expressed in floral tissues such as petals and pistils. Functional characterization of recombinant UGT85A96 and UGT85A98 proteins expressed in Escherichia coli showed that UGT85A98 could transfer a glucosyl moiety from UDP-glucose to the hydroxyl group of various substrates including volatile benzenoids/phenylpropanoids, terpene alcohol, flavonoids, and C6 alcohol, whereas UGT85A96 specifically catalyzes the glucosylation of 2-phenylethanol and benzyl alcohol. This report describes the first experimental evidence to identify UGT enzymes that catalyze the glycosylation of volatile benzenoids/phenylpropanoids in petunia flowers.
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Affiliation(s)
- Takao Koeduka
- Graduate School of Sciences and Technology for Innovation (Agriculture), Department of Biological Chemistry, Yamaguchi University, Yamaguchi, Japan.
| | - Yukiko Ueyama
- Graduate School of Sciences and Technology for Innovation (Agriculture), Department of Biological Chemistry, Yamaguchi University, Yamaguchi, Japan
| | | | - Toshiyuki Ohnishi
- Research Institute of Green Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Kenji Matsui
- Graduate School of Sciences and Technology for Innovation (Agriculture), Department of Biological Chemistry, Yamaguchi University, Yamaguchi, Japan
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28
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Byproduct-free geraniol glycosylation by whole-cell biotransformation with recombinant Escherichia coli. Biotechnol Lett 2020; 43:247-259. [PMID: 32860164 PMCID: PMC7796880 DOI: 10.1007/s10529-020-02993-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 08/18/2020] [Indexed: 11/15/2022]
Abstract
Objective Geraniol, a fragrance of great importance in the consumer goods industry, can be glucosylated by the UDP-glucose-dependent glucosyltransferase VvGT14a from Vitis vinifera, yielding more stable geranyl glucoside. Escherichia coli expressing VvGT14a is a convenient whole-cell biocatalyst for this biotransformation due to its intrinsic capability for UDP-glucose regeneration. The low water solubility and high cytotoxicity of geraniol can be overcome in a biphasic system where the non-aqueous phase functions as an in situ substrate reservoir. However, the effect of different process variables on the biphasic whole-cell biotransformation is unknown. Thus, the goal of this study was to identify potential bottlenecks during biotransformation with in situ geraniol supply via isopropyl myristate as second non-aqueous phase. Results First, insufficient UDP-glucose supply could be ruled out by measurement of intracellular UDP-glucose concentrations. Instead, oxygen supply was determined as a bottleneck. Moreover, the formation of the byproduct geranyl acetate by chloramphenicol acetyltransferase (CAT) was identified as a constraint for high product yields. The use of a CAT-deficient whole-cell biocatalyst prevented the formation of geranyl acetate, and geranyl glucoside could be obtained with 100% selectivity during a biotransformation on L-scale. Conclusion This study is the first to closely analyze the whole-cell biotransformation of geraniol with Escherichia coli expressing an UDP-glucose-dependent glucosyltransferase and can be used as an optimal starting point for the design of other glycosylation processes. Electronic supplementary material The online version of this article (10.1007/s10529-020-02993-z) contains supplementary material, which is available to authorized users.
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29
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Ren Z, Ji X, Jiao Z, Luo Y, Zhang GQ, Tao S, Lei Z, Zhang J, Wang Y, Liu ZJ, Wei G. Functional analysis of a novel C-glycosyltransferase in the orchid Dendrobium catenatum. HORTICULTURE RESEARCH 2020; 7:111. [PMID: 32637139 PMCID: PMC7326982 DOI: 10.1038/s41438-020-0330-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/20/2020] [Accepted: 04/28/2020] [Indexed: 02/05/2023]
Abstract
Flavonoids, which are a diverse class of phytonutrients, are used by organisms to respond to nearly all abiotic stresses and are beneficial for human health. Glycosyltransferase, used during the last step of flavonoid biosynthesis, is important in flavonoid enrichment. However, little is known about glycosyltransferase in the orchid Dendrobium catenatum (D. officinale). In this study, we isolated a novel C-glycosyltransferase (designated DcaCGT) from the orchid D. catenatum by identifying and analyzing 82 putative genes in the GT1 family. DcaCGT could specifically catalyze not only di-C-glycosylation but also O-glycosylation. Apart from the normal function of catalyzing 2-hydroxynaringenin and phloretin to the respective di-C-glycosides, DcaCGT also catalyzes apigenin to cosmosiin. Targeted metabolic profiling of the substrates (2-hydroxynaringenin, phloretin, and apigenin) and products (vitexin, isovitexin, vicenin-2, nothofagin, 3',5'-di-C-glucosylphloretin, and cosmosiin) in different tissues showed that vicenin-2 was the most abundant product of this novel enzyme. Cosmosiin was detected in flowers and flower buds. We also established that DcaCGT functions expanded throughout the evolution of D. catenatum. Residual OGT activity may help D. catenatum resist drought stress. Our study illustrates the function, origin, and differentiation of DcaCGT and provides insights into glycosylation and molecular propagation processes, which can be used to improve the production of flavonoids by the cultivated medicinal plant D. catenatum.
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Affiliation(s)
- Zhiyao Ren
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006 China
| | - Xiaoyu Ji
- Shantou University Medical College, Shantou, 515041 China
| | - Zhenbin Jiao
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
- Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and The Orchid Conservation and Research Center of Shenzhen, Shenzhen, 518114 China
| | - Yingyi Luo
- Department of Pharmacy, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120 Guangdong China
| | - Guo-Qiang Zhang
- Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and The Orchid Conservation and Research Center of Shenzhen, Shenzhen, 518114 China
| | - Shengchang Tao
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006 China
- Shaoguan Institute of Danxia Dendrobium Officinale, Shaoguan, 512005 China
| | - Zhouxi Lei
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006 China
| | - Jing Zhang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006 China
| | - Yuchen Wang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006 China
| | - Zhong-Jian Liu
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, 512005 China
| | - Gang Wei
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006 China
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30
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Li X, He L, An X, Yu K, Meng N, Duan C, Pan QH. VviWRKY40, a WRKY Transcription Factor, Regulates Glycosylated Monoterpenoid Production by VviGT14 in Grape Berry. Genes (Basel) 2020; 11:genes11050485. [PMID: 32365554 PMCID: PMC7290806 DOI: 10.3390/genes11050485] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 04/26/2020] [Accepted: 04/28/2020] [Indexed: 11/16/2022] Open
Abstract
Glycosylated volatile precursors are important, particularly in wine grape berries, as they contribute to the final aroma in wines by releasing volatile aglycones during yeast fermentation and wine storage. Previous study demonstrated that VviGT14 was functioned as a critical monoterpene glucosyltransferase in grape berry, while the transcriptional regulation mechanism of VviGT14 was still unknown. Here we identified VviWRKY40 as a binding factor of VviGT14 promoter by both DNA pull-down and yeast one-hybrid screening, followed by a series of in vitro verification. VviWRKY40 expression pattern negatively correlated with that of VviGT14 in grape berries. And the suppressor role of VviWRKY40 was further confirmed by using the dual luciferase assay with Arabidopsis protoplast and grape cell suspension system. Furthermore, the grape suspension cell ABA treatment study showed that ABA downregulated VviWRKY40 transcript level but promoted that of VviGT14, indicating that VviWRKY40 was at the downstream of ABA signal transduction network to regulate monoterpenoid glycosylation. These data extend our knowledge of transcriptional regulation of VviGT14, and provide new targets for grape breeding to alter monoterpenoid composition.
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Affiliation(s)
- Xiangyi Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (L.H.); (X.A.); (K.Y.); (N.M.); (C.D.)
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Lei He
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (L.H.); (X.A.); (K.Y.); (N.M.); (C.D.)
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Xiaohui An
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (L.H.); (X.A.); (K.Y.); (N.M.); (C.D.)
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Keji Yu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (L.H.); (X.A.); (K.Y.); (N.M.); (C.D.)
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Nan Meng
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (L.H.); (X.A.); (K.Y.); (N.M.); (C.D.)
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Changqing Duan
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (L.H.); (X.A.); (K.Y.); (N.M.); (C.D.)
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
| | - Qiu-Hong Pan
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (L.H.); (X.A.); (K.Y.); (N.M.); (C.D.)
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
- Correspondence: ; Tel.: +86-010-62737136
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31
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Zhao M, Zhang N, Gao T, Jin J, Jing T, Wang J, Wu Y, Wan X, Schwab W, Song C. Sesquiterpene glucosylation mediated by glucosyltransferase UGT91Q2 is involved in the modulation of cold stress tolerance in tea plants. THE NEW PHYTOLOGIST 2020; 226:362-372. [PMID: 31828806 DOI: 10.1111/nph.16364] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 12/06/2019] [Indexed: 05/18/2023]
Abstract
Plants produce and emit terpenes, including sesquiterpenes, during growth and development, which serve different functions in plants. The sesquiterpene nerolidol has health-promoting properties and adds a floral scent to plants. However, the glycosylation mechanism of nerolidol and its biological roles in plants remained unknown. Sesquiterpene UDP-glucosyltransferases were selected by using metabolites-genes correlation analysis, and its roles in response to cold stress were studied. We discovered the first plant UGT (UGT91Q2) in tea plant, whose expression is strongly induced by cold stress and which specifically catalyzes the glucosylation of nerolidol. The accumulation of nerolidol glucoside was consistent with the expression level of UGT91Q2 in response to cold stress, as well as in different tea cultivars. The reactive oxygen species (ROS) scavenging capacity of nerolidol glucoside was significantly higher than that of free nerolidol. Down-regulation of UGT91Q2 resulted in reduced accumulation of nerolidol glucoside, ROS scavenging capacity and tea plant cold tolerance. Tea plants absorbed airborne nerolidol and converted it to its glucoside, subsequently enhancing tea plant cold stress tolerance. Nerolidol plays a role in response to cold stress as well as in triggering plant-plant communication in response to cold stress. Our findings reveal previously unidentified roles of volatiles in response to abiotic stress in plants.
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Affiliation(s)
- Mingyue Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Na Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Ting Gao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jieyang Jin
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Tingting Jing
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jingming Wang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Yi Wu
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Wilfried Schwab
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, Freising, 85354, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
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32
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Caffrey AJ, Lerno LA, Zweigenbaum J, Ebeler SE. Direct Analysis of Glycosidic Aroma Precursors Containing Multiple Aglycone Classes in Vitis vinifera Berries. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:3817-3833. [PMID: 32129620 DOI: 10.1021/acs.jafc.9b08323] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Ultra-high-performance liquid chromatography (UHPLC) accurate mass tandem mass spectrometry is a powerful tool for identifying and profiling plant metabolites. Here, we describe an approach to characterize glycosidically bound precursors of monoterpenoids, norisoprenoids, volatile phenols, aliphatic alcohols, and sesquiterpenoids in grapes. Chromatographic separation of glycosylated compounds was evaluated using phenyl-hexyl (reverse phase), glycan/hydrophilic interaction, and porous graphitic carbon (PGC) stationary phases. PGC provided the best UHPLC separation for 102 tentatively identified aroma precursors in Vitis vinifera L. cv. Riesling and Muscat of Alexandria berries. Monoterpene-triol, monoterpene-tetraol, and sesquiterpenol glycosides were tentatively identified for the first time in grapes, and a C6-alcohol trisaccharide was tentatively identified for the first time in any plant. Comparison of glycosylated aroma molecules in Riesling and Muscat of Alexandria grapes showed that the two varieties were distinguishable based on relative abundances of shared glycosides and the presence of glycosides unique to a single variety.
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Affiliation(s)
- Andrew J Caffrey
- Department of Viticulture and Enology, University of California, Davis, California 95616, United States
- Food Safety and Measurement Facility, University of California, Davis, California 95616, United States
| | - Larry A Lerno
- Department of Viticulture and Enology, University of California, Davis, California 95616, United States
- Food Safety and Measurement Facility, University of California, Davis, California 95616, United States
| | - Jerry Zweigenbaum
- Agilent Technologies, Inc., Wilmington, Delaware 19808, United States
| | - Susan E Ebeler
- Department of Viticulture and Enology, University of California, Davis, California 95616, United States
- Food Safety and Measurement Facility, University of California, Davis, California 95616, United States
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33
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Yue X, Ma X, Tang Y, Wang Y, Wu B, Jiao X, Zhang Z, Ju Y. Effect of cluster zone leaf removal on monoterpene profiles of Sauvignon Blanc grapes and wines. Food Res Int 2020; 131:109028. [PMID: 32247455 DOI: 10.1016/j.foodres.2020.109028] [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: 10/17/2019] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 12/14/2022]
Abstract
Monoterpenes contribute to the varietal aromas of grapes and wines. We determined the effects of cluster zone leaf removal on the monoterpene profiles of Sauvignon Blanc grape berries and wines, and on the expression of key genes in the terpenoid pathway. Leaf removal at two intensities (half basic, 50%; full basic, 100%) was conducted at two weeks before veraison, veraison, and two weeks after veraison. Half basic leaf removal increased the pH and decreased the tartaric acid content in grapes and wines. The concentrations of most free- and bound-form monoterpenes in grapes were increased by early leaf removal. The total monoterpene contents were increased in wines in the defoliation treatments, but were significantly lower in wines from the full basic leaf removal treatments than in wines from the half basic leaf removal treatments. The defoliation treatments resulted in increased transcript levels of some key genes in terpene biosynthesis (VvPNLinNer1, VvPNLinNer2, VvPNLNGl1, VvPNLNGl2, and VvUGT88A1L1).
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Affiliation(s)
- Xiaofeng Yue
- College of Enology, Northwest A&F University, Yangling 712100, PR China.
| | - Xin Ma
- College of Enology, Northwest A&F University, Yangling 712100, PR China
| | - Yali Tang
- College of Enology, Northwest A&F University, Yangling 712100, PR China.
| | - Ying Wang
- College of Enology, Northwest A&F University, Yangling 712100, PR China.
| | - Bowen Wu
- College of Enology, Northwest A&F University, Yangling 712100, PR China
| | - Xuliang Jiao
- Sino-French Joint Venture Dynasty Winery LTD, Tianjin 300402, PR China
| | - Zhenwen Zhang
- College of Enology, Northwest A&F University, Yangling 712100, PR China; Shaanxi Engineering Research Center for Viti-Viniculture, Yangling 712100, PR China.
| | - Yanlun Ju
- College of Enology, Northwest A&F University, Yangling 712100, PR China.
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Bioderivatization as a concept for renewable production of chemicals that are toxic or poorly soluble in the liquid phase. Proc Natl Acad Sci U S A 2020; 117:1404-1413. [PMID: 31915296 PMCID: PMC6983404 DOI: 10.1073/pnas.1914069117] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Microorganisms can be rationally engineered to convert CO2 and H2O into chemicals, replacing those made from fossil fuels today. Sometimes such chemicals are poorly soluble in water or negatively affect the growth of the microorganism, resulting in cost-inefficient manufacturing. In nature, this problem is often solved by converting incompatible chemicals into those more compatible with the host and/or environment. Inspired by this, we propose a similar strategy for engineered biotechnology, whereby biochemical conversion inside the microorganism is followed by chemical reversal once outside. The principle was demonstrated with 1-octanol by implementing two different conversion methods in two different species, showing enhanced bioproduction in most cases. The approach may stimulate commercialization of sustainable and renewable production of chemicals. Bio-based production technologies may complement or replace petroleum-based production of chemicals, but they face a number of technical challenges, including product toxicity and/or water insolubility. Plants and microorganisms naturally biosynthesize chemicals that often are converted into derivatives with reduced toxicity or enhanced solubility. Inspired by this principle, we propose a bioderivatization strategy for biotechnological chemicals production, defined as purposeful biochemical derivatization of intended target molecules. As proof of principle, the effects of hydrophobic (e.g., esterification) and hydrophilic (e.g., glycosylation) bioderivatization strategies on the biosynthesis of a relatively toxic and poorly soluble chemical, 1-octanol, were evaluated in Escherichia coli and Synechocystis sp. PCC 6803. The 1-octanol pathway was first optimized to reach product titers at which the host displayed symptoms of toxicity. Solvent overlay used to capture volatile products partially masked product toxicity. Regardless of whether solvent overlay was used, most strains with bioderivatization had a higher molar product titer and product yield, as well as improved cellular growth and glucose consumption, compared with strains without bioderivatization. The positive effect on bioproduction was observed with both the hydrophobic and hydrophilic strategies. Interestingly, in several combinations of genotype/induction strength, bioderivatization had a positive effect on productivity without any apparent effect on growth. We attribute this to enhanced product solubility in the aqueous or solvent fraction of the bioreactor liquid phase (depending on the derivative and medium used), with consequent enhanced product removal. Overall, under most conditions, a benefit of bioproduction was observed, and the bioderivatization strategy could be considered for other similar chemicals as well.
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Zheng R, Zhu Z, Wang Y, Hu S, Xi W, Xiao W, Qu X, Zhong L, Fu Q, Wang C. UGT85A84 Catalyzes the Glycosylation of Aromatic Monoterpenes in Osmanthus fragrans Lour. Flowers. FRONTIERS IN PLANT SCIENCE 2019; 10:1376. [PMID: 31849999 PMCID: PMC6902048 DOI: 10.3389/fpls.2019.01376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 10/07/2019] [Indexed: 06/10/2023]
Abstract
The monoterpenes linalool and its oxides are the key aroma-active compounds in Osmanthus fragrans Lour. flowers. The glycosides of these monoterpenes accumulate throughout flowering, leading to considerable storage of potential aroma constituents that account for the majority of non-volatile aroma compounds. However, the UDP-glycosyltransferase (UGT) responsible for the glycosylation of linalool and its oxides has not been clarified. Four candidate OfUGTs (UGT85A82, UGT85A83, UGT85AF3, and UGT85A84) with high homology to the known terpenoid UGTs were screened by transcriptome sequencing. Over-expression of the candidate OfUGTs in tobacco showed that UGT85A84 glycosylated linalool oxides in planta. Since the transcript levels of UGT85A84 were positively correlated with glycoside accumulation, the recombinant UGT85A84 protein was subjected to reactions with aglycones and sugar donors. Two formate adducts were exclusively detected in UDP-Glc with linalool and linalool oxide reactions by liquid chromatography-mass spectrometry (LC-MS), indicating that UDP-Glc was the specific sugar donor. The kinetic parameters demonstrated that UGT85A84 glycosylated both linalool and lianlool oxides in vitro. Further analysis demonstrated that the transcription levels of MEP pathway genes might play an important role in mediating terpenoid glycosylation. Our findings unraveled the mechanism underlying the glycosylation of essential aroma compounds in flowers. This study will facilitate the application of potential aroma contributors in future industries.
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Affiliation(s)
- Riru Zheng
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Zhenyin Zhu
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Yanli Wang
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Shiyang Hu
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Wan Xi
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Wei Xiao
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Xiaolu Qu
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Linlin Zhong
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Qiang Fu
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
| | - Caiyun Wang
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan, China
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Wang J, Abbey T, Kozak B, Madilao LL, Tindjau R, Del Nin J, Castellarin SD. Evolution over the growing season of volatile organic compounds in Viognier (Vitis vinifera L.) grapes under three irrigation regimes. Food Res Int 2019; 125:108512. [DOI: 10.1016/j.foodres.2019.108512] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/14/2019] [Accepted: 06/21/2019] [Indexed: 12/21/2022]
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Joshi R, Trinkl J, Haugeneder A, Härtl K, Franz-Oberdorf K, Giri A, Hoffmann T, Schwab W. Semirational design and engineering of grapevine glucosyltransferases for enhanced activity and modified product selectivity. Glycobiology 2019; 29:765-775. [PMID: 31361022 PMCID: PMC6835047 DOI: 10.1093/glycob/cwz056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 07/19/2019] [Accepted: 07/20/2019] [Indexed: 12/28/2022] Open
Abstract
Uridine diphosphate-dependent glycosyltransferases (UGTs) catalyze the transfer of a diversity of sugars to several acceptor molecules and often exhibit distinct substrate specificity. Modulation of glycosyltransferases for increased catalytic activity and altered substrate or product specificity are the key manipulations for the biotechnological use of glycosyltransferases in various biosynthetic processes. Here, we have engineered the binding pocket of three previously characterized Vitis vinifera glycosyltransferases, UGT88F12, UGT72B27 and UGT92G6, by structure-guided in silico mutagenesis to facilitate the interactions of active site residues with flavonol glucosides and thus modify substrate specificity and activity. Site-directed mutagenesis at selected sites, followed with liquid chromatography-mass spectrometry based activity assays, exhibited that mutant UGTs were altered in product selectivity and activity as compared to the wild-type enzymes. Mutant UGTs produced larger amounts of flavonol di-monosaccharide glucosides, which imply that the mutations led to structural changes that increased the volume of the binding pocket to accommodate a larger substrate and to release larger products at ease. Mutants showed increased activity and modified product specificity. Thus, structure-based systematic mutations of the amino acid residues in the binding pocket can be explored for the generation of engineered UGTs for diverse biotechnological applications.
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Affiliation(s)
- Rakesh Joshi
- Institute of Bioinformatics and Biotechnology (IBB), Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind Road, Pune 411007, Maharashtra, India.,Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Liesel-Beckmann-Str. 1, Germany.,Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
| | - Johanna Trinkl
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Liesel-Beckmann-Str. 1, Germany
| | - Annika Haugeneder
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Liesel-Beckmann-Str. 1, Germany
| | - Katja Härtl
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Liesel-Beckmann-Str. 1, Germany
| | - Katrin Franz-Oberdorf
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Liesel-Beckmann-Str. 1, Germany
| | - Ashok Giri
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Liesel-Beckmann-Str. 1, Germany
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Liesel-Beckmann-Str. 1, Germany
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Sun G, Strebl M, Merz M, Blamberg R, Huang FC, McGraphery K, Hoffmann T, Schwab W. Glucosylation of the phytoalexin N-feruloyl tyramine modulates the levels of pathogen-responsive metabolites in Nicotiana benthamiana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 100:20-37. [PMID: 31124249 DOI: 10.1111/tpj.14420] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/07/2019] [Accepted: 05/14/2019] [Indexed: 05/03/2023]
Abstract
Enzyme promiscuity, a common property of many uridine diphosphate sugar-dependent glycosyltransferases (UGTs) that convert small molecules, significantly hinders the identification of natural substrates and therefore the characterization of the physiological role of enzymes. In this paper we present a simple but effective strategy to identify endogenous substrates of plant UGTs using LC-MS-guided targeted glycoside analysis of transgenic plants. We successfully identified natural substrates of two promiscuous Nicotiana benthamiana UGTs (NbUGT73A24 and NbUGT73A25), orthologues of pathogen-induced tobacco UGT (TOGT) from Nicotiana tabacum, which is involved in the hypersensitive reaction. While in N. tabacum, TOGT glucosylated scopoletin after treatment with salicylate, fungal elicitors and the tobacco mosaic virus, NbUGT73A24 and NbUGT73A25 produced glucosides of phytoalexin N-feruloyl tyramine, which may strengthen cell walls to prevent the intrusion of pathogens, and flavonols after agroinfiltration of the corresponding genes in N. benthamiana. Enzymatic glucosylation of fractions of a physiological aglycone library confirmed the biological substrates of UGTs. In addition, overexpression of both genes in N. benthamiana produced clear lesions on the leaves and led to a significantly reduced content of pathogen-induced plant metabolites such as phenylalanine and tryptophan. Our results revealed some additional biological functions of TOGT enzymes and indicated a multifunctional role of UGTs in plant resistance.
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Affiliation(s)
- Guangxin Sun
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Michael Strebl
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Maximilian Merz
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Robert Blamberg
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Fong-Chin Huang
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Kate McGraphery
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
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Diretto G, Ahrazem O, Rubio-Moraga Á, Fiore A, Sevi F, Argandoña J, Gómez-Gómez L. UGT709G1: a novel uridine diphosphate glycosyltransferase involved in the biosynthesis of picrocrocin, the precursor of safranal in saffron (Crocus sativus). THE NEW PHYTOLOGIST 2019; 224:725-740. [PMID: 31356694 DOI: 10.1111/nph.16079] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/23/2019] [Indexed: 06/10/2023]
Abstract
Saffron, a spice derived from the dried red stigmas of Crocus sativus, is one of the oldest natural food additives. The flowers have long red stigmas, which store significant quantities of the glycosylated apocarotenoids crocins and picrocrocin. The apocarotenoid biosynthetic pathway in saffron starts with the oxidative cleavage of zeaxanthin, from which crocins and picrocrocin are derived. In the processed stigmas, picrocrocin is converted to safranal, giving saffron its typical aroma. By a targeted search for differentially expressed uridine diphosphate glycosyltransferases (UGTs) in Crocus transcriptomes, a novel apocarotenoid glucosyltransferase (UGT709G1) from saffron was identified. Biochemical analyses revealed that UGT709G1 showed a high catalytic efficiency toward 2,6,6-trimethyl-4-hydroxy-1-carboxaldehyde-1-cyclohexene (HTCC), making it suited for the biosynthesis of picrocrocin, the precursor of safranal. The role of UGT709G1 in picrocrocin/safranal biosynthesis was supported by the absence or presence of gene expression in a screening for HTCC and picrocrocin production in different Crocus species and by a combined transient expression assay with CsCCD2L in Nicotiana benthamiana leaves. The identification of UGT709G1 completes one of the most highly valued specialized metabolic biosynthetic pathways in plants and provides novel perspectives on the industrial production of picrocrocin to be used as a flavor additive or as a pharmacological constituent.
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Affiliation(s)
- Gianfranco Diretto
- Italian National Agency for New Technologies, Energy, and Sustainable Development, Casaccia Research Centre, 00123, Rome, Italy
| | - Oussama Ahrazem
- Instituto Botánico, Departamento de Ciencia y Tecnología Agroforestal y Genética, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071, Albacete, Spain
| | - Ángela Rubio-Moraga
- Instituto Botánico, Departamento de Ciencia y Tecnología Agroforestal y Genética, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071, Albacete, Spain
| | - Alessia Fiore
- Italian National Agency for New Technologies, Energy, and Sustainable Development, Casaccia Research Centre, 00123, Rome, Italy
| | - Filippo Sevi
- Italian National Agency for New Technologies, Energy, and Sustainable Development, Casaccia Research Centre, 00123, Rome, Italy
| | - Javier Argandoña
- Instituto Botánico, Departamento de Ciencia y Tecnología Agroforestal y Genética, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071, Albacete, Spain
| | - Lourdes Gómez-Gómez
- Instituto Botánico, Departamento de Ciencia y Tecnología Agroforestal y Genética, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071, Albacete, Spain
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Novel biotechnological glucosylation of high-impact aroma chemicals, 3(2H)- and 2(5H)-furanones. Sci Rep 2019; 9:10943. [PMID: 31358872 PMCID: PMC6662797 DOI: 10.1038/s41598-019-47514-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 07/18/2019] [Indexed: 11/23/2022] Open
Abstract
Glucosyltransferases are versatile biocatalysts to chemically modify small molecules and thus enhance their water solubility and structural stability. Although the genomes of all organisms harbor a multitude of glucosyltransferase genes, their functional characterization is hampered by the lack of high-throughput in-vivo systems to rapidly test the versatility of the encoded proteins. We have developed and applied a high-throughput whole cell biotransformation system to screen a plant glucosyltransferase library. As proof of principle, we identified 25, 24, 15, and 18 biocatalysts transferring D-glucose to sotolone, maple furanone, furaneol and homofuraneol, four highly appreciated flavor compounds, respectively. Although these 3(2H)- and 2(5H)-furanones have extremely low odor thresholds their glucosides were odorless. Upscaling of the biotechnological process yielded titers of 5.3 and 7.2 g/L for the new to nature β-D-glucopyranosides of sotolone and maple furanone, respectively. Consequently, plant glucosyltransferase show stunning catalytic activities, which enable the economical production of novel and unexplored chemicals with exciting new functionalities by whole-cell biotransformation.
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Lin J, Massonnet M, Cantu D. The genetic basis of grape and wine aroma. HORTICULTURE RESEARCH 2019; 6:81. [PMID: 31645942 PMCID: PMC6804543 DOI: 10.1038/s41438-019-0163-1] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/12/2019] [Accepted: 05/14/2019] [Indexed: 05/23/2023]
Abstract
The grape is one of the oldest and most important horticultural crops. Grape and wine aroma has long been of cultural and scientific interest. The diverse compound classes comprising aroma result from multiple biosynthetic pathways. Only fairly recently have researchers begun to elucidate the genetic mechanisms behind the biosynthesis and metabolism of grape volatile compounds. This review summarizes current findings regarding the genetic bases of grape and wine aroma with an aim towards highlighting areas in need of further study. From the literature, we compiled a list of functionally characterized genes involved in berry aroma biosynthesis and present them with their corresponding annotation in the grape reference genome.
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Affiliation(s)
- Jerry Lin
- Department of Viticulture and Enology, University of California Davis, One Shields Ave, Davis, CA 95616 USA
| | - Mélanie Massonnet
- Department of Viticulture and Enology, University of California Davis, One Shields Ave, Davis, CA 95616 USA
| | - Dario Cantu
- Department of Viticulture and Enology, University of California Davis, One Shields Ave, Davis, CA 95616 USA
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Godshaw J, Hjelmeland AK, Zweigenbaum J, Ebeler SE. Changes in glycosylation patterns of monoterpenes during grape berry maturation in six cultivars of Vitis vinifera. Food Chem 2019; 297:124921. [PMID: 31253264 DOI: 10.1016/j.foodchem.2019.05.195] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/28/2019] [Accepted: 05/28/2019] [Indexed: 10/26/2022]
Abstract
Plants conjugate monoterpenoids to sugars, rendering them non-volatile. Hydrolysis of these glycosidic precursors frees the volatile aroma compounds. Here, we profile intact monoterpenyl glycosides in six Vitis vinifera grape berry cultivars. Relative concentrations of twenty-six monoterpenyl glycosides, including nine new putatively identified compounds, were analyzed by UHPLC-QTOF MS/MS at three times during grape maturation (pre-véraison, véraison, and post-véraison). Total glycoside content reached a maximum in Muscat cultivars post-véraison but remained relatively constant in all other cultivars. Three types of monoterpenyl glycosides predominated in all samples: malonylated monoterpenol glucosides, monoterpenol hexose-pentoses, and monoterpendiol hexose-pentoses. The two Muscat cultivars were not differentiated at the earlier developmental stages but could be differentiated post-véraison. In contrast, similarities between Chardonnay and Pinot noir glycoside profiles developed post-véraison. Overall monoterpene glycoconjugation patterns may align with underlying genetic relationships among cultivars. By understanding monoterpene glycoconjugation in wine grapes, scientists and winemakers can better understand grape and wine aromas.
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Affiliation(s)
- Joshua Godshaw
- Department of Viticulture and Enology, University of California, Davis, Davis, CA, United States; Food Safety and Measurement Facility, University of California, Davis, Davis, CA, United States
| | | | | | - Susan E Ebeler
- Department of Viticulture and Enology, University of California, Davis, Davis, CA, United States; Food Safety and Measurement Facility, University of California, Davis, Davis, CA, United States.
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Chen J, Yuan Z, Zhang H, Li W, Shi M, Peng Z, Li M, Tian J, Deng X, Cheng Y, Deng CH, Xie Z, Zeng J, Yao JL, Xu J. Cit1,2RhaT and two novel CitdGlcTs participate in flavor-related flavonoid metabolism during citrus fruit development. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:2759-2771. [PMID: 30840066 PMCID: PMC6506761 DOI: 10.1093/jxb/erz081] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 02/14/2019] [Indexed: 05/19/2023]
Abstract
Neohesperidosides are disaccharides that are present in some flavonoids and impart a bitter taste, which can significantly affect the commercial value of citrus fruits. In this study, we identified three flavonoid-7-O-di-glucosyltransferase (dGlcT) genes closely related to 1,2-rhamnosyltransferase (1,2RhaT) in citrus genomes. However, only 1,2RhaT was directly linked to the accumulation of neohesperidoside, as demonstrated by association analysis of 50 accessions and co-segregation analysis of an F1 population derived from Citrus reticulata × Poncirus trifoliata. In transgenic tobacco BY2 cells, over-expression of CitdGlcTs resulted in flavonoid-7-O-glucosides being catalysed into bitterless flavonoid-7-O-di-glucosides, whereas over-expression of Cit1,2RhaT converted the same substrate into bitter-tasting flavonoid-7-O-neohesperidoside. Unlike 1,2RhaT, during citrus fruit development the dGlcTs showed an opposite expression pattern to CHS and CHI, two genes encoding rate-limiting enzymes of flavonoid biosynthesis. An uncoupled availability of dGlcTs and substrates might result in trace accumulation of flavonoid-7-O-di-glucosides in the fruit of C. maxima (pummelo). Past human selection of the deletion and functional mutation of 1,2RhaT has led step-by-step to the evolution of the flavor-related metabolic network in citrus. Our research provides the basis for potentially improving the taste in citrus fruit through manipulation of the network by knocking-out 1,2RhaT or by enhancing the expression of dGlcT using genetic transformation.
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Affiliation(s)
- Jiajing Chen
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Ziyu Yuan
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Haipeng Zhang
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Wenyun Li
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
- Guizhou Fruit Institute, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou Province, China
| | - Meiyan Shi
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Zhaoxin Peng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Mingyue Li
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Jing Tian
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Xiuxin Deng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Yunjiang Cheng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Cecilia Hong Deng
- The New Zealand Institute for Plant & Food Research Limited, Private Bag, Auckland, New Zealand
| | - Zongzhou Xie
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
| | - Jiwu Zeng
- Guangdong Fruit Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
| | - Jia-Long Yao
- The New Zealand Institute for Plant & Food Research Limited, Private Bag, Auckland, New Zealand
- Correspondence: or
| | - Juan Xu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, PR China
- Correspondence: or
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Improving an Escherichia coli-based biocatalyst for terpenol glycosylation by variation of the expression system. J Ind Microbiol Biotechnol 2019; 46:1129-1138. [PMID: 31062116 PMCID: PMC7088306 DOI: 10.1007/s10295-019-02184-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/29/2019] [Indexed: 11/02/2022]
Abstract
Glycosides are becoming increasingly more relevant for various industries as low-cost whole-cell-biocatalysts are now available for the manufacture of glycosides. However, there is still a need to optimize the biocatalysts. The aim of this work was to increase the titre of terpenyl glucosides in biotransformation assays with E. coli expressing VvGT14ao, a glycosyltransferase gene from grape (Vitis vinifera). Seven expression plasmids differing in the resistance gene, origin of replication, promoter sequence, and fusion protein tag were generated and transformed into four different E. coli expression strains, resulting in 18 strains that were tested for glycosylation efficiency with terpenols and a phenol. E. coli BL21(DE3)/pET-SUMO_VvGT14ao yielded the highest titres. The product concentration was improved 8.6-fold compared with E. coli BL21(DE3)pLysS/pET29a_VvGT14ao. The selection of a small solubility-enhancing protein tag and exploitation of the T7 polymerase-induction system allowed the formation of increased levels of functional recombinant protein, thereby improving the performance of the whole-cell biocatalyst.
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Jing T, Zhang N, Gao T, Zhao M, Jin J, Chen Y, Xu M, Wan X, Schwab W, Song C. Glucosylation of (Z)-3-hexenol informs intraspecies interactions in plants: A case study in Camellia sinensis. PLANT, CELL & ENVIRONMENT 2019; 42:1352-1367. [PMID: 30421786 DOI: 10.1111/pce.13479] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 10/26/2018] [Accepted: 10/31/2018] [Indexed: 05/18/2023]
Abstract
Plants emit a variety of volatiles in response to herbivore attack, and (Z)-3-hexenol and its glycosides have been shown to function as defence compounds. Although the ability to incorporate and convert (Z)-3-hexenol to glycosides is widely conserved in plants, the enzymes responsible for the glycosylation of (Z)-3-hexenol remained unknown until today. In this study, uridine-diphosphate-dependent glycosyltransferase (UGT) candidate genes were selected by correlation analysis and their response to airborne (Z)-3-hexenol, which has been shown to be taken up by the tea plant. The allelic proteins UGT85A53-1 and UGT85A53-2 showed the highest activity towards (Z)-3-hexenol and are distinct from UGT85A53-3, which displayed a similar catalytic efficiency for (Z)-3-hexenol and nerol. A single amino acid exchange E59D enhanced the activity towards (Z)-3-hexenol, whereas a L445M mutation reduced the catalytic activity towards all substrates tested. Transient overexpression of CsUGT85A53-1 in tobacco significantly increased the level of (Z)-3-hexenyl glucoside. The functional characterization of CsUGT85A53 as a (Z)-3-hexenol UGT not only provides the foundation for the biotechnological production of (Z)-3-hexenyl glucoside but also delivers insights for the development of novel insect pest control strategies in tea plant and might be generally applicable to other plants.
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Affiliation(s)
- Tingting Jing
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Na Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Ting Gao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Mingyue Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Jieyang Jin
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Yongxian Chen
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Miaojing Xu
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Wilfried Schwab
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
- Biotechnology of Natural Products, Technische Universität München, 85354, Freising, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
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Wu B, Cao X, Liu H, Zhu C, Klee H, Zhang B, Chen K. UDP-glucosyltransferase PpUGT85A2 controls volatile glycosylation in peach. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:925-936. [PMID: 30481327 PMCID: PMC6363097 DOI: 10.1093/jxb/ery419] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 11/18/2018] [Indexed: 05/18/2023]
Abstract
The monoterpene linalool is a major contributor to aroma and flavor in peach (Prunus persica) fruit. It accumulates during fruit ripening, where up to ~40% of the compound is present in a non-volatile glycosylated form, which affects flavor quality and consumer perception by retronasal perception during tasting. Despite the importance of this sequestration to flavor, the UDP-glycosyltransferase (UGT) responsible for linalool glycosylation has not been identified in peach. UGT gene expression during peach fruit ripening and among different peach cultivars was analyzed using RNA sequencing, and transcripts correlated with linalyl-β-d-glucoside were selected as candidates for functional analysis. Kinetic resolution of a racemic mixture of R,S-linalool was shown for PpUGT85A2, with a slight preference for S-(+)-linalool. PpUGT85A2 was shown to catalyze synthesis of linalyl-β-d-glucoside in vitro, although it did not exhibit the highest enzyme activity between tested substrates. Subcellular localization of PpUGT85A2 in the cytoplasm and nucleus was detected. Application of linalool to peach leaf disks promoted PpUGT85A2 expression and linalyl-β-d-glucoside generation. Transient expression in peach fruit and stable overexpression in tobacco and Arabidopsis resulted in significant accumulation of linalyl-β-d-glucoside in vivo. Taken together, the results indicate that PpUGT85A2 expression is a major control point predicting linalyl-β-d-glucoside content.
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Affiliation(s)
- Boping Wu
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
| | - Xiangmei Cao
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
| | - Hongru Liu
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
| | - Changqing Zhu
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
| | - Harry Klee
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
- Horticultural Sciences, Plant Innovation Center, Genetic Institute, University of Florida, Gainesville, FL, USA
| | - Bo Zhang
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
- Correspondence:
| | - Kunsong Chen
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
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Meng X, Li Y, Zhou T, Sun W, Shan X, Gao X, Wang L. Functional Differentiation of Duplicated Flavonoid 3- O-Glycosyltransferases in the Flavonol and Anthocyanin Biosynthesis of Freesia hybrida. FRONTIERS IN PLANT SCIENCE 2019; 10:1330. [PMID: 31681396 PMCID: PMC6813240 DOI: 10.3389/fpls.2019.01330] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 09/24/2019] [Indexed: 05/13/2023]
Abstract
Flavonols and anthocyanins are two widely distributed groups of flavonoids that occurred apart during plant evolution and biosynthesized by shared specific enzymes involved in flavonoid metabolism. UDP-glucose, flavonoid 3-O-glycosyltransferase (UF3GT), is one of the common enzymes which could catalyze the glycosylation of both flavonol and anthocyanidin aglycons simultaneously in vitro. However, whether and how UF3GT paralogous genes function diversely at the biochemical and transcriptional levels are largely unknown. Recently, Fh3GT1 was identified to be a member of UF3GTs in Freesia hybrida. However, its expression patterns and enzymatic characteristics could not coincide well with flavonol accumulation. In an attempt to characterize other flavonoids, especially flavonol glycosyltransferase genes in Freesia, three closest candidate UFGT genes-Fh3GT2, Fh3GT3, and Fh3GT4-were mined from the Freesia transcriptomic database and isolated from the flowers of the widely distributed Freesia cultivar, Red River®. Based on bioinformatic analysis and enzymatic assays, Fh3GT2 turned out to be another bona fide glycosyltransferase gene. Biochemical analysis further proved that Fh3GT2 preferentially glucosylated kaempferol while Fh3GT1 controlled the glucosylation of quercetin and anthocyanidins. In addition, transfection assays demonstrated that Fh3GT2 could be mainly activated by the flavonol regulator FhMYBF1 or the anthocyanin regulator FhPAP1, whereas Fh3GT1 could only be activated by FhPAP1. These findings suggested that Fh3GTs might have functionally diverged in flavonoid biosynthesis at both the biochemical and transcriptional levels.
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Affiliation(s)
- Xiangyu Meng
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Yueqing Li
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Tongtong Zhou
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Wei Sun
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
- Key Laboratory of Plant Physiology and Development Regulation, School of Life Science, Guizhou Normal University, Guiyang, China
| | - Xiaotong Shan
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Xiang Gao
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
- National Demonstration Center for Experimental Biology Education, Northeast Normal University, Changchun, China
- *Correspondence: Xiang Gao, ; Li Wang,
| | - Li Wang
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
- *Correspondence: Xiang Gao, ; Li Wang,
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Comparative Genomic and Transcriptomic Analyses of Family-1 UDP Glycosyltransferase in Prunus Mume. Int J Mol Sci 2018; 19:ijms19113382. [PMID: 30380641 PMCID: PMC6274698 DOI: 10.3390/ijms19113382] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/09/2018] [Accepted: 10/12/2018] [Indexed: 12/02/2022] Open
Abstract
Glycosylation mediated by Family-1 UDP-glycosyltransferases (UGTs) plays crucial roles in plant growth and adaptation to various stress conditions. Prunus mume is an ideal crop for analyzing flowering for its early spring flowering characteristics. Revealing the genomic and transcriptomic portfolio of the UGT family in P. mume, a species in which UGTs have not yet been investigated, is therefore important. In this study, 130 putative UGT genes were identified and phylogenetically clustered into 14 groups. These PmUGTs were distributed unevenly across eight chromosomes and 32 tandem duplication and 8 segmental duplication pairs were revealed. A highly conserved intron insertion event was revealed on the basis of intron/exon patterns within PmUGTs. According to RNA-seq data, these PmUGTs were specifically expressed in different tissues and during the bud dormancy process. In addition, we confirmed the differential expression of some representative genes in response to abscisic acid treatment. Our results will provide important information on the UGT family in P. mume that should aid further characterization of their biological roles in response to environmental stress.
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Song C, Härtl K, McGraphery K, Hoffmann T, Schwab W. Attractive but Toxic: Emerging Roles of Glycosidically Bound Volatiles and Glycosyltransferases Involved in Their Formation. MOLECULAR PLANT 2018; 11:1225-1236. [PMID: 30223041 DOI: 10.1016/j.molp.2018.09.001] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 09/05/2018] [Accepted: 09/10/2018] [Indexed: 05/18/2023]
Abstract
Plants emit an overabundance of volatile compounds, which act in their producers either as appreciated attractants to lure beneficial animals or as repellent toxins to deter pests in a species-specific and concentration-dependent manner. Plants have evolved solutions to provide sufficient volatiles without poisoning themselves. Uridine-diphosphate sugar-dependent glycosyltransferases (UGTs) acting on volatiles is one important part of this sophisticated system, which balances the levels of bioactive metabolites and prepares them for cellular and long-distance transport and storage but enables the remobilization of disarmed toxins for the benefit of plant protection. This review provides an overview of the research history of glycosidically bound volatiles (GBVs), a relatively new group of plant secondary metabolites, and discusses the role of UGTs in the production of GBVs for plant protection.
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Affiliation(s)
- Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, West Changjiang Road, Hefei, Anhui 230036, China
| | - Katja Härtl
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, Freising 85354, Germany
| | - Kate McGraphery
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, Freising 85354, Germany
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, Freising 85354, Germany
| | - Wilfried Schwab
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, West Changjiang Road, Hefei, Anhui 230036, China; Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, Freising 85354, Germany.
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50
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Huang FC, Giri A, Daniilidis M, Sun G, Härtl K, Hoffmann T, Schwab W. Structural and Functional Analysis of UGT92G6 Suggests an Evolutionary Link Between Mono- and Disaccharide Glycoside-Forming Transferases. PLANT & CELL PHYSIOLOGY 2018; 59:857-870. [PMID: 29444327 DOI: 10.1093/pcp/pcy028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 01/30/2018] [Indexed: 05/05/2023]
Abstract
Glycosylation mediated by UDP-dependent glycosyltransferase (UGT) is one of the most common reactions for the biosynthesis of small molecule glycosides. As glycosides have various biological roles, we characterized UGT genes from grapevine (Vitis vinifera). In silico analysis of VvUGT genes that were highly expressed in leaves identified UGT92G6 which showed sequence similarity to both monosaccharide and disaccharide glucoside-forming transferases. The recombinant UGT92G6 glucosylated phenolics, among them caffeic acid, carvacrol, eugenol and raspberry ketone, and also accepted geranyl glucoside and citronellyl glucoside. Thus, UGT92G6 formed mono- and diglucosides in vitro from distinct compounds. The enzyme specificity constant Vmax/Km ratios indicated that UGT92G6 exhibited the highest specificity towards caffeic acid, producing almost equal amounts of the 3- and 4-O-glucoside. Transient overexpression of UGT92G6 in Nicotiana benthamiana leaves confirmed the production of caffeoyl glucoside; however, the level of geranyl diglucoside was not elevated upon overexpression of UGT92G6, even after co-expression of genes encoding geraniol synthase and geraniol UGT to provide sufficient precursor. Comparative sequence and 3-D structure analysis identified a sequence motif characteristic for monoglucoside-forming UGTs in UGT92G6, suggesting an evolutionary link between mono- and disaccharide glycoside UGTs. Thus, UGT92G6 functions as a mono- and diglucosyltransferase in vitro, but acts as a caffeoyl glucoside UGT in N. benthamiana.
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Affiliation(s)
- Fong-Chin Huang
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
| | - Ashok Giri
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, MS 411 008, India
| | - Melina Daniilidis
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
| | - Guangxin Sun
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
| | - Katja Härtl
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, D-85354 Freising, Germany
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