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Zebosi B, Vollbrecht E, Best NB. Brassinosteroid biosynthesis and signaling: Conserved and diversified functions of core genes across multiple plant species. PLANT COMMUNICATIONS 2024:100982. [PMID: 38816993 DOI: 10.1016/j.xplc.2024.100982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/13/2024] [Accepted: 05/28/2024] [Indexed: 06/01/2024]
Abstract
Brassinosteroids (BRs) are important regulators that control myriad aspects of plant growth and development, including biotic and abiotic stress responses, such that modulating BR homeostasis and signaling presents abundant opportunities for plant breeding and crop improvement. Enzymes and other proteins involved in the biosynthesis and signaling of BRs are well understood from molecular genetics and phenotypic analysis in Arabidopsis thaliana; however, knowledge of the molecular functions of these genes in other plant species, especially cereal crop plants, is minimal. In this manuscript, we comprehensively review functional studies of BR genes in Arabidopsis, maize, rice, Setaria, Brachypodium, and soybean to identify conserved and diversified functions across plant species and to highlight cases for which additional research is in order. We performed phylogenetic analysis of gene families involved in the biosynthesis and signaling of BRs and re-analyzed publicly available transcriptomic data. Gene trees coupled with expression data provide a valuable guide to supplement future research on BRs in these important crop species, enabling researchers to identify gene-editing targets for BR-related functional studies.
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Affiliation(s)
- Brian Zebosi
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011, USA; Interdepartmental Genetics and Genomics Graduate Program, Iowa State University, Ames, IA 50011, USA
| | - Erik Vollbrecht
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011, USA; Interdepartmental Genetics and Genomics Graduate Program, Iowa State University, Ames, IA 50011, USA.
| | - Norman B Best
- USDA-ARS, Plant Genetics Research Unit, Columbia, MO 65201, USA.
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2
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Yang C, Halitschke R, O'Connor SE. OXIDOSQUALENE CYCLASE 1 and 2 influence triterpene biosynthesis and defense in Nicotiana attenuata. PLANT PHYSIOLOGY 2024; 194:2580-2599. [PMID: 38101922 PMCID: PMC10980520 DOI: 10.1093/plphys/kiad643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 11/07/2023] [Indexed: 12/17/2023]
Abstract
Triterpenes are a class of bioactive compounds with diverse biological functions, playing pivotal roles in plant defense against biotic stressors. Oxidosqualene cyclases (OSCs) serve as gatekeepers in the biosynthesis of triterpenes. In this study, we utilized a Nicotiana benthamiana heterologous expression system to characterize NaOSC1 from Nicotiana attenuata as a multifunctional enzyme capable of synthesizing lupeol, dammarenediol II, 3-alpha,20-lupanediol, and 7 other triterpene scaffolds. We also demonstrated that NaOSC2 is, in contrast, a selective enzyme, producing only the β-amyrin scaffold. Through virus-induced gene silencing and in vitro toxicity assays, we elucidated the roles of NaOSC1 and NaOSC2 in the defense of N. attenuata against Manduca sexta larvae. Metabolomic and feature-based molecular network analyses of leaves with silenced NaOSC1 and NaOSC2 unveiled 3 potential triterpene glycoside metabolite clusters. Interestingly, features identified as triterpenes within these clusters displayed a significant negative correlation with larval mass. Our study highlights the pivotal roles of NaOSC1 and NaOSC2 from N. attenuata in the initial steps of triterpene biosynthesis, subsequently influencing defense against M. sexta through the modulation of downstream triterpene glycoside compounds.
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Affiliation(s)
- Caiqiong Yang
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena D-07745, Germany
| | - Rayko Halitschke
- Mass Spectrometry and Metabolomics, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena D-07745, Germany
| | - Sarah E O'Connor
- Department of Natural Product Biosynthesis, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena D-07745, Germany
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3
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Yang Y, Hou J, Luan J. Resistance mechanisms of Saccharomyces cerevisiae against silver nanoparticles with different sizes and coatings. Food Chem Toxicol 2024; 186:114581. [PMID: 38460669 DOI: 10.1016/j.fct.2024.114581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 01/15/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
To investigate the underlying resistance mechanisms of Saccharomyces cerevisiae against Ag-NPs with different particle sizes and coatings, transcriptome sequencing (RNA-seq) technology was used to characterize the transcriptomes from S. cerevisiae exposed to 20-PVP-Ag, 100-PVP-Ag, 20-CIT-Ag and 100-CIT-Ag, respectively. The steroid biosynthesis was found as a general pathway for Ag-NPs stress responding, in which ERG6 and ERG3 were inhibited and ERG11, ERG25 and ERG5 were significantly up-regulated to resist the stress by supporting the later mutation and resistance and modulate drug efflux indirectly. The resistance mechanism of S. cerevisiae to 20-PVP-Ag seems different from that of 100-PVP-Ag, 20-CIT-Ag and 100-CIT-Ag. Under the 20-PVP-Ag, transmembrane transporter activity, transition metal ion homeostasis and oxidative phosphorylation pathway were main resistance pathways to enhance cell transport processes. While 100-PVP-Ag, 20-CIT-Ag and 100-CIT-Ag mainly impacted RNA binding, structural constituent of ribosome and ribosome pathway which can provide more energy to maintain the number and function of protein in cells. This study reveals the differences in resistance mechanisms of S. cerevisiae to Ag-NPs with different particle sizes and coatings, and explains several main regulatory mechanisms used to respond to silver stress. It will provide theoretical basis for the study of chemical risk assessment.
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Affiliation(s)
- Yue Yang
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Jing Hou
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China.
| | - Jian Luan
- College of Life Sciences, Jilin Normal University, Jilin, 136000, PR China
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4
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Zhang SY, Peng YQ, Xiang GS, Song WL, Feng L, Jiang XY, Li XJ, He SM, Yang SC, Zhao Y, Zhang GH. Functional characterization of genes related to triterpene and flavonoid biosynthesis in Cyclocarya paliurus. PLANTA 2024; 259:50. [PMID: 38285114 DOI: 10.1007/s00425-023-04282-1] [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: 08/15/2023] [Accepted: 11/04/2023] [Indexed: 01/30/2024]
Abstract
MAIN CONCLUSION The oxidosqualene cyclases (OSCs) generating triterpenoid skeletons in Cyclocarya paliurus were identified for the first time, and two uridine diphosphate (UDP)-glycosyltransferases (UGTs) catalyzing the glycosylation of flavonoids were characterized. Cyclocarya paliurus, a native rare dicotyledonous plant in China, contains an abundance of triterpenoid saponins and flavonoid glycosides that exhibit valuable pharmaceutical effects in preventing hypertension, hyperlipidemia, and diabetes. However, the molecular mechanism explaining the biosynthesis of triterpenoid saponin and flavonoid glycoside in C. paliurus remains unclear. In this study, the triterpene content in different tissues and the expression pattern of genes encoding the key enzymes associated with triterpenoid saponin and flavonoid glycoside biosynthesis were studied using transcriptome and metabolome analysis. The eight upstream oxidosqualene cyclases (OSCs) involved in triterpenoid saponin biosynthesis were functionally characterized, among them CpalOSC6 catalyzed 2,3;22,23-dioxidosqualene to form 3-epicabraleadiol; CpalOSC8 cyclized 2,3-oxidosqualene to generate dammarenediol-II; CpalOSC2 and CpalOSC3 produced β-amyrin and CpalOSC4 produced cycloartenol, while CpalOSC2-CpalOSC5, CpalOSC7, and CpalOSC8 all produced lanosterol. However, no catalytic product was detected for CpalOSC1. Moreover, two downstream flavonoid uridine diphosphate (UDP)-glycosyltransferases (UGTs) (CpalUGT015 and CpalUGT100) that catalyze the last step of flavonoid glycoside biosynthesis were functionally elucidated. These results uncovered the key genes involved in the biosynthesis of triterpenoid saponins and flavonoid glycosides in C. paliurus that could be applied to produce flavonoid glycosides and key triterpenoid saponins in the future via a synthetic strategy.
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Affiliation(s)
- Shuang-Yan Zhang
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Yu-Qing Peng
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Gui-Sheng Xiang
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Wan-Ling Song
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Lei Feng
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Xin-Yue Jiang
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Xue-Jiao Li
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Si-Mei He
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Sheng-Chao Yang
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China
| | - Yan Zhao
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China.
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China.
| | - Guang-Hui Zhang
- College of Agronomy and Biotechnology, National-Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Fengyuan Road, Panlong District, Kunming, 650201, Yunnan, China.
- Yunnan Characteristic Plant Extraction Laboratory, Kunming, 650106, Yunnan, China.
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5
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Li M, Ma M, Wu Z, Liang X, Zheng Q, Li D, An T, Wang G. Advances in the biosynthesis and metabolic engineering of rare ginsenosides. Appl Microbiol Biotechnol 2023; 107:3391-3404. [PMID: 37126085 DOI: 10.1007/s00253-023-12549-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/16/2023] [Accepted: 04/18/2023] [Indexed: 05/02/2023]
Abstract
Rare ginsenosides are the deglycosylated secondary metabolic derivatives of major ginsenosides, and they are more readily absorbed into the bloodstream and function as active substances. The traditional preparation methods hindered the potential application of these effective components. The continuous elucidation of ginsenoside biosynthesis pathways has rendered the production of rare ginsenosides using synthetic biology techniques effective for their large-scale production. Previously, only the progress in the biosynthesis and biotechnological production of major ginsenosides was highlighted. In this review, we summarized the recent advances in the identification of key enzymes involved in the biosynthetic pathways of rare ginsenosides, especially the glycosyltransferases (GTs). Then the construction of microbial chassis for the production of rare ginsenosides, mainly in Saccharomyces cerevisiae, was presented. In the future, discovery of more GTs and improving their catalytic efficiencies are essential for the metabolic engineering of rare ginsenosides. This review will give more clues and be helpful for the characterization of the biosynthesis and metabolic engineering of rare ginsenosides. KEY POINTS: • The key enzymes involved in the biosynthetic pathways of rare ginsenosides are summarized. • The recent progress in metabolic engineering of rare ginsenosides is presented. • The discovery of glycosyltransferases is essential for the microbial production of rare ginsenosides in the future.
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Affiliation(s)
- Mingkai Li
- Featured Laboratory for Biosynthesis and Target Discovery of Active Components of Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
| | - Mengyu Ma
- Featured Laboratory for Biosynthesis and Target Discovery of Active Components of Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
| | - Zhenke Wu
- Featured Laboratory for Biosynthesis and Target Discovery of Active Components of Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
| | - Xiqin Liang
- Featured Laboratory for Biosynthesis and Target Discovery of Active Components of Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
| | - Qiusheng Zheng
- Featured Laboratory for Biosynthesis and Target Discovery of Active Components of Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China
| | - Defang Li
- Featured Laboratory for Biosynthesis and Target Discovery of Active Components of Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China.
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China.
| | - Tianyue An
- Featured Laboratory for Biosynthesis and Target Discovery of Active Components of Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China.
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China.
| | - Guoli Wang
- Featured Laboratory for Biosynthesis and Target Discovery of Active Components of Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China.
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, 264003, China.
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6
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Nair IM, Kochupurackal J. Squalene hopene cyclases and oxido squalene cyclases: potential targets for regulating cyclisation reactions. Biotechnol Lett 2023; 45:573-588. [PMID: 37055654 DOI: 10.1007/s10529-023-03366-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 03/01/2023] [Accepted: 03/14/2023] [Indexed: 04/15/2023]
Abstract
Squalene hopene cyclases (SHC) convert squalene, the linear triterpene to fused ring product hopanoid by the cationic cyclization mechanism. The main function of hopanoids, a class of pentacyclic triterpenoids in bacteria involves the maintenance of membrane fluidity and stability. 2, 3-oxido squalene cyclases are functional analogues of SHC in eukaryotes and both these enzymes have fascinated researchers for the high stereo selectivity, complexity, and efficiency they possess. The peculiar property of the enzyme squalene hopene cyclase to accommodate substrates other than its natural substrate can be exploited for the use of these enzymes in an industrial perspective. Here, we present an extensive overview of the enzyme squalene hopene cyclase with emphasis on the cloning and overexpression strategies. An attempt has been made to explore recent research trends around squalene cyclase mediated cyclization reactions of flavour and pharmaceutical significance by using non-natural molecules as substrates.
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Affiliation(s)
- Indu Muraleedharan Nair
- School of Biosciences, Mahatma Gandhi University, Athirampuzha, Kottayam, 686560, India
- Department of Physiology, School of Medicine, University College Cork, Cork, T12 XF62, Ireland
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7
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Mohanan P, Yang TJ, Song YH. Genes and Regulatory Mechanisms for Ginsenoside Biosynthesis. JOURNAL OF PLANT BIOLOGY = SINGMUL HAKHOE CHI 2023; 66:87-97. [PMID: 36714200 PMCID: PMC9867542 DOI: 10.1007/s12374-023-09384-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 05/13/2023]
Abstract
Panax ginseng is a medicinal plant belonging to the Araliaceae family. Ginseng is known as the king of oriental medicine, which has been practiced since ancient times in East Asian countries and globally in the modern era. Ginseng is used as an adaptogen, and research shows that it has several pharmacological benefits for various ailments such as cancer, inflammation, diabetes, and neurological symptoms. The pharmacological benefits of ginseng are attributed to the triterpenoid saponin ginsenosides found throughout the Panax ginseng species, which are abundant in its root and are found exclusively in P. ginseng and Panax quinquefolius. Recently, with the completion of the entire ginseng genome sequencing and the construction of the ginseng genome database, it has become possible to access information about many genes newly predicted to be involved in ginsenoside biosynthesis. This review briefly summarizes the current progress in ginseng genome analysis and genes involved in ginsenoside biosynthesis, proposing directions for functional studies of the predicted genes related to ginsenoside production and its regulation.
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Affiliation(s)
- Padmanaban Mohanan
- Plant Genomics and Breeding Research Institute, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Korea
| | - Tae-Jin Yang
- Plant Genomics and Breeding Research Institute, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Korea
- Department of Agriculture, Forestry and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Korea
- Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Korea
| | - Young Hun Song
- Plant Genomics and Breeding Research Institute, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Korea
- Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Korea
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826 Korea
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8
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Lertphadungkit P, Qiao X, Ye M, Bunsupa S. Characterization of oxidosqualene cyclases from Trichosanthes cucumerina L. reveals key amino acids responsible for substrate specificity of isomultiflorenol synthase. PLANTA 2022; 256:58. [PMID: 35980476 DOI: 10.1007/s00425-022-03972-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
Two key amino acids of isomultiflorenol synthase, Y125 and M254, were first proposed. They could be associated with the production of isomultiflorenol. Oxidosqualene cyclases (OSCs) are the first committed enzymes in the triterpenoid biosynthesis by converting 2,3-oxidosqualene to specific triterpenoid backbones. Thus, these enzymes are potential targets for developing plant-active compounds through the study of triterpenoid biosynthesis. We applied transcriptome information and metabolite profiling from Trichosanthes cucumerina L. to define the diversity of triterpenoids in this plant through OSCs. Isomultiflorenol synthase and cucurbitadienol synthase were previously identified in this plant. Here, three new OSCs, TcBAS, TcLAS, and TcCAS, were cloned and functionally characterized as β-amyrin synthase, lanosterol synthase, and cycloartenol synthase activities, respectively. We also took advantage of the multiple sequence alignment and molecular docking of OSCs exhibiting in this plant and other plant OSCs to identify key residues associated with isomultiflorenol synthase specificity. Two novel key amino acids, referred to the Y125 and M254, were first discovered. These results provide information on a possible catalytic mechanism for plant OSCs that produce specific products.
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Affiliation(s)
- Pornpatsorn Lertphadungkit
- Department of Pharmacognosy, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayutthaya Road, Bangkok, 10400, Thailand
| | - Xue Qiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing, 100191, China
| | - Min Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing, 100191, China
| | - Somnuk Bunsupa
- Department of Pharmacognosy, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayutthaya Road, Bangkok, 10400, Thailand.
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9
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Darshani P, Sen Sarma S, Srivastava AK, Baishya R, Kumar D. Anti-viral triterpenes: a review. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2022; 21:1761-1842. [PMID: 35283698 PMCID: PMC8896976 DOI: 10.1007/s11101-022-09808-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 01/27/2022] [Indexed: 05/07/2023]
Abstract
Triterpenes are naturally occurring derivatives biosynthesized following the isoprene rule of Ruzicka. The triterpenes have been reported to possess a wide range of therapeutic applications including anti-viral properties. In this review, the recent studies (2010-2020) concerning the anti-viral activities of triterpenes have been summarized. The structure activity relationship studies have been described as well as brief biosynthesis of these triterpenes is discussed.
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Affiliation(s)
- Priya Darshani
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Jadavpur, Kolkata, India
| | - Shreya Sen Sarma
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Jadavpur, Kolkata, India
| | - Amit K. Srivastava
- Cancer Biology and Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Jadavpur, Kolkata, India
| | - Rinku Baishya
- Natural Product Chemistry Group, CSIR-North East Institute of Science and Technology (NEIST), NH-37, Pulibor, Jorhat, Assam India
| | - Deepak Kumar
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Jadavpur, Kolkata, India
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10
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Chen Y, Wu J, Yu D, Du X. Advances in steroidal saponins biosynthesis. PLANTA 2021; 254:91. [PMID: 34617240 DOI: 10.1007/s00425-021-03732-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 09/11/2021] [Indexed: 06/13/2023]
Abstract
This work reviews recent advances in the pathways and key enzymes of steroidal saponins biosynthesis and sets the foundation for the biotechnological production of these useful compounds through transformation of microorganisms. Steroidal saponins, due to their specific chemical structures and active effects, have long been important natural products and that are irreplaceable in hormone production and other pharmaceutical industries. This article comprehensively reviewed the previous and current research progress and summarized the biosynthesis pathways and key biosynthetic enzymes of steroidal saponins that have been discovered in plants and microoganisms. On the basis of the general biosynthetic pathway in plants, it was found that the starting components, intermediates and catalysing enzymes were diverse between plants and microorganisms; however, the functions of their related enzymes tended to be similar. The biosynthesis pathways of steroidal saponins in microorganisms and marine organisms have not been revealed as clearly as those in plants and need further investigation. The elucidation of biosynthetic pathways and key enzymes is essential for understanding the synthetic mechanisms of these compounds and provides researchers with important information to further develop and implement the massive production of steroidal saponins by biotechnological approaches and methodologies.
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Affiliation(s)
- Yiyang Chen
- Key Laboratory of Chinese Materia Medica, Ministry of Education, Pharmaceutical College, Heilongjiang University of Chinese Medicine, 24 Heping Road, Harbin, 150040, China
| | - Junkai Wu
- Key Laboratory of Chinese Materia Medica, Ministry of Education, Pharmaceutical College, Heilongjiang University of Chinese Medicine, 24 Heping Road, Harbin, 150040, China
| | - Dan Yu
- Key Laboratory of Chinese Materia Medica, Ministry of Education, Pharmaceutical College, Heilongjiang University of Chinese Medicine, 24 Heping Road, Harbin, 150040, China
| | - Xiaowei Du
- Key Laboratory of Chinese Materia Medica, Ministry of Education, Pharmaceutical College, Heilongjiang University of Chinese Medicine, 24 Heping Road, Harbin, 150040, China.
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11
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Wang J, Guo Y, Yin X, Wang X, Qi X, Xue Z. Diverse triterpene skeletons are derived from the expansion and divergent evolution of 2,3-oxidosqualene cyclases in plants. Crit Rev Biochem Mol Biol 2021; 57:113-132. [PMID: 34601979 DOI: 10.1080/10409238.2021.1979458] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Triterpenoids are one of the largest groups of secondary metabolites and exhibit diverse structures, which are derived from C30 skeletons that are biosynthesized via the isoprenoid pathway by cyclization of 2,3-oxidosqualene. Triterpenoids have a wide range of biological activities, and are used in functional foods, drugs, and as industrial materials. Due to the low content levels in their native plants and limited feasibility and efficiency of chemical synthesis, heterologous biosynthesis of triterpenoids is the most promising strategy. Herein, we classified 121 triterpene alcohols/ketones according to their conformation and ring numbers, among which 51 skeletons have been experimentally characterized as the products of oxidosqualene cyclases (OSCs). Interestingly, 24 skeletons that have not been reported from nature source were generated by OSCs in heterologous expression. Comprehensive evolutionary analysis of the identified 152 OSCs from 75 species in 25 plant orders show that several pentacyclic triterpene synthases repeatedly originated in multiple plant lineages. Comparative analysis of OSC catalytic reaction revealed that stabilization of intermediate cations, steric hindrance, and conformation of active center amino acid residues are primary factors affecting triterpene formation. Optimization of OSC could be achieved by changing of side-chain orientations of key residues. Recently, methods, such as rationally design of pathways, regulation of metabolic flow, compartmentalization engineering, etc., were introduced in improving chassis for the biosynthesis of triterpenoids. We expect that extensive study of natural variation of large number of OSCs and catalytical mechanism will provide basis for production of high level of triterpenoids by application of synthetic biology strategies.
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Affiliation(s)
- Jing Wang
- Ministry of Education, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Northeast Forestry University, Harbin, PR China.,Heilongjiang Key Laboratory of Plant Bioactive Substance Biosynthesis and Utilization, Northeast Forestry University, Harbin, PR China.,Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, PR China
| | - Yanhong Guo
- Ministry of Education, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Northeast Forestry University, Harbin, PR China.,Heilongjiang Key Laboratory of Plant Bioactive Substance Biosynthesis and Utilization, Northeast Forestry University, Harbin, PR China
| | - Xue Yin
- Ministry of Education, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Northeast Forestry University, Harbin, PR China.,Heilongjiang Key Laboratory of Plant Bioactive Substance Biosynthesis and Utilization, Northeast Forestry University, Harbin, PR China
| | - Xiaoning Wang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Xiaoquan Qi
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, PR China
| | - Zheyong Xue
- Ministry of Education, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Northeast Forestry University, Harbin, PR China.,Heilongjiang Key Laboratory of Plant Bioactive Substance Biosynthesis and Utilization, Northeast Forestry University, Harbin, PR China
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12
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Johnson JB, Ekanayake CP, Caravani F, Mani JS, Lal P, Calgaro SJ, Prasad SS, Warner RD, Naiker M. A Review of Vitamin D and Its Precursors in Plants and Their Translation to Active Metabolites in Meat. FOOD REVIEWS INTERNATIONAL 2021. [DOI: 10.1080/87559129.2021.1936006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Joel B. Johnson
- School of Health, Medical & Applied Sciences, CQUniversity, North Rockhampton, Australia
| | - C. P. Ekanayake
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Federico Caravani
- School of Health, Medical & Applied Sciences, CQUniversity, North Rockhampton, Australia
| | - Janice S. Mani
- School of Health, Medical & Applied Sciences, CQUniversity, North Rockhampton, Australia
| | - Pawan Lal
- School of Health, Medical & Applied Sciences, CQUniversity, North Rockhampton, Australia
| | - Sarah J. Calgaro
- School of Health, Medical & Applied Sciences, CQUniversity, North Rockhampton, Australia
| | - Shirtika S. Prasad
- Faculty of Science, Technology and Engineering, the University of the South Pacific, Laucala Campus, Suva, Fiji
| | - Robyn D Warner
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Australia
| | - Mani Naiker
- School of Health, Medical & Applied Sciences, CQUniversity, North Rockhampton, Australia
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13
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An GH, Han JG, Park HS, Sung GH, Kim OT. Identification of an Oxidosqualene Cyclase Gene Involved in Steroidal Triterpenoid Biosynthesis in Cordyceps farinosa. Genes (Basel) 2021; 12:genes12060848. [PMID: 34072640 PMCID: PMC8227516 DOI: 10.3390/genes12060848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/24/2021] [Accepted: 05/28/2021] [Indexed: 11/16/2022] Open
Abstract
Various fungi including Cordyceps farinosa, an entomopathogenic fungus, can produce steroidal triterpenoids. Protostadienol (protosta-17(20)Z,24-dien-3β-ol) is a precursor of steroidal triterpenoid compounds. To identify oxidosqualene cyclase (OSC) gene candidates involved in triterpenoid biosynthesis, genome mining was performed using Illumina sequencing platform. In the sequence database, two OSC genes, CfaOSC1 and CfaOSC2, in the genome of C. farinosa were identified. Predicted amino-acid sequences of CfaOSC2 shared 66% similarities with protostadienol synthase (OSPC) of Aspergillus fumigatus. Phylogenetic analysis showed a clear grouping of CfaOSC2 in the OSPC clade. Function of CfaOSC2 was examined using a yeast INVSc1 heterologous expression system to endogenously synthesize 2,3-oxidosqualene. GC-MS analysis indicated that CfaOSC2 produced protosta-13(17),24-dien-3β-ol and protostadienol at a 5:95 ratio. Our results demonstrate that CfaOSC2 is a multifunctional triterpene synthase yielding a predominant protostadienol together with a minor triterpenoid. These results will facilitate a greater understanding of biosynthetic mechanisms underlying steroidal triterpenoid biosynthesis in C. farinosa and other fungi.
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Affiliation(s)
- Gi-Hong An
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumseong 27709, Korea; (G.-H.A.); (J.-G.H.); (H.-S.P.)
| | - Jae-Gu Han
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumseong 27709, Korea; (G.-H.A.); (J.-G.H.); (H.-S.P.)
| | - Hye-Sung Park
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumseong 27709, Korea; (G.-H.A.); (J.-G.H.); (H.-S.P.)
| | - Gi-Ho Sung
- Catholic Kwandong University International St. Mary’s Hospital, Incheon 22711, Korea;
| | - Ok-Tae Kim
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumseong 27709, Korea; (G.-H.A.); (J.-G.H.); (H.-S.P.)
- Correspondence: ; Tel.: +82-43-871-5730
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14
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Darnet S, Blary A, Chevalier Q, Schaller H. Phytosterol Profiles, Genomes and Enzymes - An Overview. FRONTIERS IN PLANT SCIENCE 2021; 12:665206. [PMID: 34093623 PMCID: PMC8172173 DOI: 10.3389/fpls.2021.665206] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 04/20/2021] [Indexed: 05/12/2023]
Abstract
The remarkable diversity of sterol biosynthetic capacities described in living organisms is enriched at a fast pace by a growing number of sequenced genomes. Whereas analytical chemistry has produced a wealth of sterol profiles of species in diverse taxonomic groups including seed and non-seed plants, algae, phytoplanktonic species and other unicellular eukaryotes, functional assays and validation of candidate genes unveils new enzymes and new pathways besides canonical biosynthetic schemes. An overview of the current landscape of sterol pathways in the tree of life is tentatively assembled in a series of sterolotypes that encompass major groups and provides also peculiar features of sterol profiles in bacteria, fungi, plants, and algae.
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Affiliation(s)
| | | | | | - Hubert Schaller
- Plant Isoprenoid Biology Team, Institut de Biologie Moléculaire des Plantes du CNRS, Université de Strasbourg, Strasbourg, France
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15
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De Vriese K, Pollier J, Goossens A, Beeckman T, Vanneste S. Dissecting cholesterol and phytosterol biosynthesis via mutants and inhibitors. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:241-253. [PMID: 32929492 DOI: 10.1093/jxb/eraa429] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/11/2020] [Indexed: 06/11/2023]
Abstract
Plants stand out among eukaryotes due to the large variety of sterols and sterol derivatives that they can produce. These metabolites not only serve as critical determinants of membrane structures, but also act as signaling molecules, as growth-regulating hormones, or as modulators of enzyme activities. Therefore, it is critical to understand the wiring of the biosynthetic pathways by which plants generate these distinct sterols, to allow their manipulation and to dissect their precise physiological roles. Here, we review the complexity and variation of the biosynthetic routes of the most abundant phytosterols and cholesterol in the green lineage and how different enzymes in these pathways are conserved and diverged from humans, yeast, and even bacteria. Many enzymatic steps show a deep evolutionary conservation, while others are executed by completely different enzymes. This has important implications for the use and specificity of available human and yeast sterol biosynthesis inhibitors in plants, and argues for the development of plant-tailored inhibitors of sterol biosynthesis.
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Affiliation(s)
- Kjell De Vriese
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark, Ghent, Belgium
- VIB Center for Plant Systems Biology, VIB, Technologiepark, Ghent, Belgium
| | - Jacob Pollier
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark, Ghent, Belgium
- VIB Center for Plant Systems Biology, VIB, Technologiepark, Ghent, Belgium
- VIB Metabolomics Core, Technologiepark, Ghent, Belgium
| | - Alain Goossens
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark, Ghent, Belgium
- VIB Center for Plant Systems Biology, VIB, Technologiepark, Ghent, Belgium
| | - Tom Beeckman
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark, Ghent, Belgium
- VIB Center for Plant Systems Biology, VIB, Technologiepark, Ghent, Belgium
| | - Steffen Vanneste
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark, Ghent, Belgium
- VIB Center for Plant Systems Biology, VIB, Technologiepark, Ghent, Belgium
- Laboratory of Plant Growth Analysis, Ghent University Global Campus, Songdomunhwa-Ro, Yeonsu-gu, Incheon, Republic of Korea
- Department of Plants and Crops, Ghent University, Ghent, Belgium
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16
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Mahmoudi S, Barrocas Dias C, Manhita A, Boutoumi H, Charif R. Formulation of goat's milk yogurt with fig powder: Aromatic profile, physicochemical and microbiological characteristics. FOOD SCI TECHNOL INT 2021; 27:712-725. [PMID: 33412945 DOI: 10.1177/1082013220983961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Fig (Ficus carica L.) is an excellent source of sugars, dietary fibers, minerals, vitamins, organic acids and phytochemicals. The aim of the present work was to investigate the effect of fig powder supplement, as a natural sweetener and flavoring agent, on the physicochemical, microbiological and sensory characteristics of goat's milk yogurt. It aimed also to determine antioxidant capacity and volatile profile using gas chromatography/mass spectrometry (GC/MS) analysis. Pyrolysis-GC/MS (Py-GC/MS) was also used for the characterization of fig powder. Fig powder exhibited an important antioxidant activity against DPPH. Radical (IC50 = 1.92 ± 0.05 mg per mL). Volatile compounds, from several classes (acids, alcohols, aldehydes, esters, triterpenoids and others) were identified in fig powder. Py-GC/MS data revealed that degradation of fig powder macromolecules leaded to the formation of several aromatic and volatile compounds such as fatty acids, ketones, aromatic phenols, lactones among others. The addition of fig powder increased significantly (p < 0.05) the titrable acidity, the total solids, the carbohydrate content, and the total lactic acid bacteria count of yogurts. Likewise, fig powder supplement improved yogurt taste, texture and aroma and covered the unpleasant flavor of goat's milk. Thus, fig powder is a natural sweetener and flavoring agent that can be used to formulate a new stirred goat's yogurt of good quality.
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Affiliation(s)
- Souhila Mahmoudi
- Department of Agronomic Sciences, University of Mohamed Boudiaf, Msila, Algeria
| | | | - Ana Manhita
- HERCULES Laboratory, University of Évora, Portugal
| | - Hocine Boutoumi
- Department of Industrial Chemistry, University of Blida, Algeria
| | - Rahma Charif
- Department of Agronomic Sciences, University of Mohamed Boudiaf, Msila, Algeria
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17
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Zhan X, Luo X, He J, Zhang C, Liao X, Xu X, Feng S, Yu C, Jiang Z, Meng Y, Shen C, Wang H, Lu J. Bioactive compounds induced in Physalis angulata L. by methyl-jasmonate: an investigation of compound accumulation patterns and biosynthesis-related candidate genes. PLANT MOLECULAR BIOLOGY 2020; 103:341-354. [PMID: 32227258 DOI: 10.1007/s11103-020-00996-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 03/09/2020] [Indexed: 05/14/2023]
Abstract
We employed both metabolomic and transcriptomic approaches to explore the accumulation patterns of physalins, flavonoids and chlorogenic acid in Physalis angulata and revealed the genes associated with the biosynthesis of bioactive compounds under methyl-jasmonate (MeJA) treatment. Physalis angulata L. is an annual Solanaceae plant with a number of medicinally active compounds. Despite the potential pharmacological benefits of P. angulata, the scarce genomic information regarding this plant has limited the studies on the mechanisms of bioactive compound biosynthesis. To facilitate the basic understanding of the main chemical constituent biosynthesis pathways, we performed both metabolomic and transcriptomic approaches to reveal the genes associated with the biosynthesis of bioactive compounds under methyl-jasmonate (MeJA) treatment. Untargeted metabolome analysis showed that most physalins, flavonoids and chlorogenic acid were significantly upregulated. Targeted HPLC-MS/MS analysis confirmed variations in the contents of two important representative steroid derivatives (physalins B and G), total flavonoids, neochlorogenic acid, and chlorogenic acid between MeJA-treated plants and controls. Transcript levels of a few steroid biosynthesis-, flavonoid biosynthesis-, and chlorogenic acid biosynthesis-related genes were upregulated, providing a potential explanation for MeJA-induced active ingredient synthesis in P. angulata. Systematic correlation analysis identified a number of novel candidate genes associated with bioactive compound biosynthesis. These results may help to elucidate the regulatory mechanism underlying MeJA-induced active compound accumulation and provide several valuable candidate genes for further functional study.
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Affiliation(s)
- Xiaori Zhan
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Xiujun Luo
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Jinyu He
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Chengchao Zhang
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Xinyue Liao
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Xinyun Xu
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Shangguo Feng
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Chunna Yu
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Zhifang Jiang
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Yijun Meng
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Chenjia Shen
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China
| | - Huizhong Wang
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China.
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China.
| | - Jiangjie Lu
- College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, 310036, China.
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, 310036, China.
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Beijing, 100093, China.
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18
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Jacobowitz JR, Weng JK. Exploring Uncharted Territories of Plant Specialized Metabolism in the Postgenomic Era. ANNUAL REVIEW OF PLANT BIOLOGY 2020; 71:631-658. [PMID: 32176525 DOI: 10.1146/annurev-arplant-081519-035634] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
For millennia, humans have used plants for food, raw materials, and medicines, but only within the past two centuries have we begun to connect particular plant metabolites with specific properties and utilities. Since the utility of classical molecular genetics beyond model species is limited, the vast specialized metabolic systems present in the Earth's flora remain largely unstudied. With an explosion in genomics resources and a rapidly expanding toolbox over the past decade, exploration of plant specialized metabolism in nonmodel species is becoming more feasible than ever before. We review the state-of-the-art tools that have enabled this rapid progress. We present recent examples of de novo biosynthetic pathway discovery that employ various innovative approaches. We also draw attention to the higher-order organization of plant specialized metabolism at subcellular, cellular, tissue, interorgan, and interspecies levels, which will have important implications for the future design of comprehensive metabolic engineering strategies.
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Affiliation(s)
- Joseph R Jacobowitz
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142, USA;
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Jing-Ke Weng
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142, USA;
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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19
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Mohammadi M, Mashayekh T, Rashidi-Monfared S, Ebrahimi A, Abedini D. New insights into diosgenin biosynthesis pathway and its regulation in Trigonella foenum-graecum L. PHYTOCHEMICAL ANALYSIS : PCA 2020; 31:229-241. [PMID: 31469464 DOI: 10.1002/pca.2887] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 07/17/2019] [Accepted: 07/21/2019] [Indexed: 05/05/2023]
Abstract
INTRODUCTION Throughout history, thousands of medicinal and aromatic plants have been widely utilised by people worldwide. Owing to them possessing of valuable compounds with little side effects in comparison with chemical drugs, herbs have been of interest to humans for a number of purposes. Diosgenin, driven from fenugreek, Trigonella foenum-graecum L., has extensively drawn scientist's attention owing to having curable properties and being a precursor of steroid hormones synthesis. Nonetheless, complete knowledge about the biosynthesis pathway of this metabolite is still elusive. OBJECTIVE In the present research, we isolated the full-length CDS of 14 genes involving in diosgenin formation and measured their expression rate in various genotypes, which had illustrated different amount of diosgenin. METHODOLOGY The genes were successfully isolated, and functional motifs were also assessed using in silico approaches. RESULTS Moreover, combining transcript and metabolite analysis revealed that there are many genes playing the role in diosgenin formation, some of which are highly influential. Among them, ∆24 -reductase, which converts cycloartenol to cycloartanol, is the first-committed and rate-limiting enzyme in this pathway. Additionally, no transcripts indicating to the presence or expression of lanosterol synthase were detected, contradicting the previous hypothesis about the biosynthetic pathway of diosgenin in fenugreek. CONCLUSION Considering all these, therefore, we propose the most possible pathway of diosgenin. This knowledge will then pave the way toward cloning the genes as well as engineering the diosgenin biosynthesis pathway.
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Affiliation(s)
- Mohammad Mohammadi
- Agricultural Biotechnology Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - Tooba Mashayekh
- Agricultural Biotechnology Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - Sajad Rashidi-Monfared
- Agricultural Biotechnology Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - Amin Ebrahimi
- Agronomy and Plant Breeding Department, Faculty of Agriculture, Shahrood University of Technology, Semnan, Iran
| | - Davar Abedini
- Agricultural Biotechnology Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
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20
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Srisawat P, Fukushima EO, Yasumoto S, Robertlee J, Suzuki H, Seki H, Muranaka T. Identification of oxidosqualene cyclases from the medicinal legume tree Bauhinia forficata: a step toward discovering preponderant α-amyrin-producing activity. THE NEW PHYTOLOGIST 2019; 224:352-366. [PMID: 31230357 DOI: 10.1111/nph.16013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 06/15/2019] [Indexed: 05/27/2023]
Abstract
Triterpenoids are widely distributed among plants of the legume family. However, most studies have focused on triterpenoids and their biosynthetic enzymes in model legumes. We evaluated the triterpenoid aglycones profile of the medicinal legume tree Bauhinia forficata by gas chromatography-mass spectrometry. Through transcriptome analyses, homology-based cloning, and heterologous expression, we discovered four oxidosqualene cyclases (OSCs) which are responsible for the diversity of triterpenols in B. forficata. We also investigated the effects of the unique motif TLCYCR on α-amyrin synthase activity. B. forficata highly accumulated α-amyrin. We discovered an OSC with a preponderant α-amyrin-producing activity, which accounted for at least 95% of the total triterpenols. We also discovered three other functional OSCs (BfOSC1, BfOSC2, and BfOSC4) that produce β-amyrin, germanicol, and cycloartenol. Furthermore, by replacing the unique motif TLCYCR from BfOSC3 with the MWCYCR motif, we altered the function of BfOSC3 such that it no longer produced α-amyrin. Our results provide new insights into OSC cyclization, which is responsible for the diversity of triterpenoid metabolites in B. forficata, a non-model legume plant.
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Affiliation(s)
- Pisanee Srisawat
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan
| | - Ery Odette Fukushima
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan
- Universidad Regional Amazónica IKIAM, Tena, 150150, Ecuador
| | - Shuhei Yasumoto
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan
| | - Jekson Robertlee
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan
- Department of Frontier Research, Kazusa DNA Research Institute, Kisarazu, 292-0818, Japan
| | - Hideyuki Suzuki
- Department of Research & Development, Kazusa DNA Research Institute, Kisarazu, 292-0818, Japan
| | - Hikaru Seki
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan
| | - Toshiya Muranaka
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan
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21
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Stephenson MJ, Field RA, Osbourn A. The protosteryl and dammarenyl cation dichotomy in polycyclic triterpene biosynthesis revisited: has this 'rule' finally been broken? Nat Prod Rep 2019; 36:1044-1052. [PMID: 30783639 DOI: 10.1039/c8np00096d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Covering: 1948 up to the end of 2018. The triterpene alcohols represent an important and diverse class of natural products. This diversity is believed to originate from the differential enzymatically controlled cyclisation of 2,3-oxidosqualene. It is now a well-established presumption that all naturally occurring tetra- and penta-cyclic triterpene alcohols can be rationalised by the resolution of one of two intermediary tetracyclic cations, termed the protosteryl and dammarenyl cations. Here, a discussion of typical key triterpene structures and their proposed derivation from either of these progenitors is followed by comparison with a recently reported novel pentacyclic triterpene orysatinol which appears to correspond to an unprecedented divergence from this dichotomous protosteryl/dammarenyl view of triterpene biogenesis. Not only does this discovery widen the potential scope of triterpene scaffolds that could exist in nature, it could call into question the reliability of stereochemical assignments of some existing triterpene structures that are supported by only limited spectroscopic evidence. The discovery of orysatinol provides direct experimental evidence to support considering more flexibility in the stereochemical interpretation of the biogenic isoprene rule.
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22
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Yang Z, Yang L, Liu C, Qin X, Liu H, Chen J, Ji Y. Transcriptome analyses of Paris polyphylla var. chinensis, Ypsilandra thibetica, and Polygonatum kingianum characterize their steroidal saponin biosynthesis pathway. Fitoterapia 2019; 135:52-63. [PMID: 30999023 DOI: 10.1016/j.fitote.2019.04.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 04/01/2019] [Accepted: 04/13/2019] [Indexed: 10/27/2022]
Abstract
Steroidal saponins, one of the most diverse groups of plant-derived natural products, elicit biological and pharmacological activities; however, the genes involved in their biosynthesis and the corresponding biosynthetic pathway in monocotyledon plants remain unclear. This study aimed to identify genes involved in the biosynthesis of steroidal saponins by performing a comparative analysis among transcriptomes of Paris polyphylla var. chinensis (PPC), Ypsilandra thibetica (YT), and Polygonatum kingianum (PK). De novo transcriptome assemblies generated 57,537, 140,420, and 151,773 unigenes from PPC, YT, and PK, respectively, of which 56.54, 47.81, and 44.30% were successfully annotated, respectively. Among the transcriptomes for PPC, YT, and PK, we identified 194, 169, and 131; 17, 14, and 26; and, 80, 122, and 113 unigenes corresponding to terpenoid backbone biosynthesis; sesquiterpenoid and triterpenoid biosynthesis; and, steroid biosynthesis pathways, respectively. These genes are putatively involved in the biosynthesis of cholesterol that is the primary precursor of steroidal saponins. Phylogenetic analyses indicated that lanosterol synthase may be exclusive to dicotyledon plant species, and the cytochrome P450 unigenes were closely related to clusters CYP90B1 and CYP734A1, which are UDP-glycosyltransferases unigenes homologous with the UGT73 family. Thus, unigenes of β-glucosidase may be candidate genes for catalysis of later period modifications of the steroidal saponin skeleton. Our data provide evidence to support the hypothesis that monocotyledons biosynthesize steroidal saponins from cholesterol via the cycloartenol pathway.
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Affiliation(s)
- Zhenyan Yang
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China; Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Population, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China
| | - Lifang Yang
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China; School of Life Science, Yunnan University, Kunming 650201, Yunnan, PR China
| | - Changkun Liu
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China; Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Population, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China
| | - Xujie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China
| | - Haiyang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China
| | - Jiahui Chen
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China.
| | - Yunheng Ji
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China; Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Population, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China.
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23
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Forestier E, Romero-Segura C, Pateraki I, Centeno E, Compagnon V, Preiss M, Berna A, Boronat A, Bach TJ, Darnet S, Schaller H. Distinct triterpene synthases in the laticifers of Euphorbia lathyris. Sci Rep 2019; 9:4840. [PMID: 30886213 PMCID: PMC6423090 DOI: 10.1038/s41598-019-40905-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 02/08/2019] [Indexed: 11/20/2022] Open
Abstract
Euphorbia lathyris was proposed about fifty years ago as a potential agroenergetic crop. The tremendous amounts of triterpenes present in its latex has driven investigations for transforming this particular biological fluid into an industrial hydrocarbon source. The huge accumulation of terpenes in the latex of many plant species represent a challenging question regarding cellular homeostasis. In fact, the enzymes, the mechanisms and the controllers that tune the amount of products accumulated in specialized compartments (to fulfill ecological roles) or deposited at important sites (as essential factors) are not known. Here, we have isolated oxidosqualene cyclases highly expressed in the latex of Euphorbia lathyris. This triterpene biosynthetic machinery is made of distinct paralogous enzymes responsible for the massive accumulation of steroidal and non-steroidal tetracyclic triterpenes. More than eighty years after the isolation of butyrospermol from shea butter (Heilbronn IM, Moffet GL, and Spring FS J. Chem. Soc. 1934, 1583), a butyrospermol synthase is characterized in this work using yeast and in folia heterologous expression assays.
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Affiliation(s)
- Edith Forestier
- Plant Isoprenoid Biology team, Institut de Biologie Moléculaire des Plantes, UPR2357 du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, Strasbourg cedex, 67084, France
| | - Carmen Romero-Segura
- Center for Research in Agricultural Genomics (CSIC-IRTA-UAB-UB), Bellaterra, Spain
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, 08028, Barcelona, Spain
| | - Irini Pateraki
- Center for Research in Agricultural Genomics (CSIC-IRTA-UAB-UB), Bellaterra, Spain
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, 08028, Barcelona, Spain
| | - Emilio Centeno
- Center for Research in Agricultural Genomics (CSIC-IRTA-UAB-UB), Bellaterra, Spain
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, 08028, Barcelona, Spain
| | - Vincent Compagnon
- Plant Isoprenoid Biology team, Institut de Biologie Moléculaire des Plantes, UPR2357 du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, Strasbourg cedex, 67084, France
| | - Myriam Preiss
- Plant Isoprenoid Biology team, Institut de Biologie Moléculaire des Plantes, UPR2357 du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, Strasbourg cedex, 67084, France
| | - Anne Berna
- Plant Isoprenoid Biology team, Institut de Biologie Moléculaire des Plantes, UPR2357 du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, Strasbourg cedex, 67084, France
| | - Albert Boronat
- Center for Research in Agricultural Genomics (CSIC-IRTA-UAB-UB), Bellaterra, Spain
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, 08028, Barcelona, Spain
| | - Thomas J Bach
- Plant Isoprenoid Biology team, Institut de Biologie Moléculaire des Plantes, UPR2357 du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, Strasbourg cedex, 67084, France
| | - Sylvain Darnet
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Pará, Brazil
| | - Hubert Schaller
- Plant Isoprenoid Biology team, Institut de Biologie Moléculaire des Plantes, UPR2357 du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, Strasbourg cedex, 67084, France.
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24
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Qiao J, Luo Z, Gu Z, Zhang Y, Zhang X, Ma X. Identification of a Novel Specific Cucurbitadienol Synthase Allele in Siraitia grosvenorii Correlates with High Catalytic Efficiency. Molecules 2019; 24:E627. [PMID: 30754652 PMCID: PMC6384864 DOI: 10.3390/molecules24030627] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/20/2019] [Accepted: 01/24/2019] [Indexed: 01/17/2023] Open
Abstract
Mogrosides, the main bioactive compounds isolated from the fruits of Siraitia grosvenorii, are a group of cucurbitane-type triterpenoid glycosides that exhibit a wide range of notable biological activities and are commercially available worldwide as natural sweeteners. However, the extraction cost is high due to their relatively low contents in plants. Therefore, molecular breeding needs to be achieved when conventional plant breeding can hardly improve the quality so far. In this study, the levels of 21 active mogrosides and two precursors in 15 S. grosvenorii varieties were determined by HPLC-MS/MS and GC-MS, respectively. The results showed that the variations in mogroside V content may be caused by the accumulation of cucurbitadienol. Furthermore, a total of four wild-type cucurbitadienol synthase protein variants (50R573L, 50C573L, 50R573Q, and 50C573Q) based on two missense mutation single nucleotide polymorphism (SNP) sites were discovered. An in vitro enzyme reaction analysis indicated that 50R573L had the highest activity, with a specific activity of 10.24 nmol min-1 mg-1. In addition, a site-directed mutant, namely, 50K573L, showed a 33% enhancement of catalytic efficiency compared to wild-type 50R573L. Our findings identify a novel cucurbitadienol synthase allele correlates with high catalytic efficiency. These results are valuable for the molecular breeding of luohanguo.
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Affiliation(s)
- Jing Qiao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
| | - Zuliang Luo
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
| | - Zhe Gu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
| | | | - Xindan Zhang
- Guilin GFS Monk Fruit Corp., Guilin 541006, China.
| | - Xiaojun Ma
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
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25
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Shang Y, Huang S. Multi-omics data-driven investigations of metabolic diversity of plant triterpenoids. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 97:101-111. [PMID: 30341835 DOI: 10.1111/tpj.14132] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 10/04/2018] [Accepted: 10/10/2018] [Indexed: 06/08/2023]
Abstract
The vast majority of structurally diverse metabolites play essential roles in mediating the interactions between plant and environment, and constitute a valuable resource for industrial applications. Recent breakthroughs in sequencing technology have greatly accelerated metabolic studies of natural plant products, providing opportunities to investigate the molecular basis underlying the diversity of specialized plant metabolites through large-scale analysis. Here, we focus on the biosynthesis of plant triterpenoids, especially the three diversifying reactions (cyclization, oxidation and glycosylation) that largely contribute to the structural diversity of triterpenoids. Gene mining through large-scale omics data and functional characterization of metabolic genes including enzymes, transcription factors and transporters could provide important insights into the evolution of specialized plant metabolism and pave the way for the production of high-value metabolites or derivatives using synthetic biology approaches.
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Affiliation(s)
- Yi Shang
- The CAAS-YNNU-YINMORE Joint Academy of Potato Science, Yunnan Normal University, Kunming, 650500, China
| | - Sanwen Huang
- Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100084, China
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26
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Identification of Key Amino Acid Residues Determining Product Specificity of 2,3-Oxidosqualene Cyclase in Siraitia grosvenorii. Catalysts 2018. [DOI: 10.3390/catal8120577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Sterols and triterpenes are structurally diverse bioactive molecules generated through cyclization of linear 2,3-oxidosqualene. Based on carbocationic intermediates generated during the initial substrate preorganization step, oxidosqualene cyclases (OSCs) are roughly segregated into a dammarenyl cation group that predominantly catalyzes triterpenoid precursor products and a protosteryl cation group which mostly generates sterol precursor products. The mechanism of conversion between two scaffolds is not well understood. Previously, we have characterized a promiscuous OSC from Siraitia grosvenorii (SgCS) that synthesizes a novel cucurbitane-type triterpene cucurbitadienol as its main product. By integration of homology modeling, molecular docking and site-directed mutagenesis, we discover that five key amino acid residues (Asp486, Cys487, Cys565, Tyr535, and His260) may be responsible for interconversions between chair–boat–chair and chair–chair–chair conformations. The discovery of euphol, dihydrolanosterol, dihydroxyeuphol and tirucallenol unlocks a new path to triterpene diversity in nature. Our findings also reveal mechanistic insights into the cyclization of oxidosqualene into cucurbitane-type and lanostane-type skeletons, and provide a new strategy to identify key residues determining OSC specificity.
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27
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Zhan X, Liao X, Luo X, Zhu Y, Feng S, Yu C, Lu J, Shen C, Wang H. Comparative Metabolomic and Proteomic Analyses Reveal the Regulation Mechanism Underlying MeJA-Induced Bioactive Compound Accumulation in Cutleaf Groundcherry ( Physalis angulata L.) Hairy Roots. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6336-6347. [PMID: 29874907 DOI: 10.1021/acs.jafc.8b02502] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Cutleaf groundcherry ( Physalis angulata L.) is an annual plant with a number of medicinal ingredients. However, studies about the secondary metabolism of P. angulata are very limited. An integrated metabolome and proteome approach was used to reveal the variations in the metabolism associated with bioactive compounds under methyl-jasmonate (MeJA) treatment. Application of MeJA to the hairy roots could significantly increase the accumulation of most active ingredients. A targeted approach confirmed the variations in physalins D and H between MeJA treatment and the controls. Increases in the levels of a number of terpenoid backbone biosynthesis and steroid biosynthesis related enzymes, cytochrome P450 monooxygenases and 3β-hydroxysterioid dehydrogenase might provide a potential explanation for the MeJA-induced active ingredient synthesis. Our results may contribute to a deeper understanding of the regulation mechanism underlying the MeJA-induced active compound accumulation in P. angulata.
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28
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Phytosterols and their derivatives: Structural diversity, distribution, metabolism, analysis, and health-promoting uses. Prog Lipid Res 2018; 70:35-61. [DOI: 10.1016/j.plipres.2018.04.001] [Citation(s) in RCA: 208] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 04/03/2018] [Accepted: 04/03/2018] [Indexed: 01/08/2023]
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29
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Qiao W, Li C, Mosongo I, Liang Q, Liu M, Wang X. Comparative Transcriptome Analysis Identifies Putative Genes Involved in Steroid Biosynthesis in Euphorbia tirucalli. Genes (Basel) 2018; 9:E38. [PMID: 29342957 PMCID: PMC5793189 DOI: 10.3390/genes9010038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 01/09/2018] [Accepted: 01/11/2018] [Indexed: 11/17/2022] Open
Abstract
Phytochemical analysis of different Euphorbia tirucalli tissues revealed a contrasting tissue-specificity for the biosynthesis of euphol and β-sitosterol, which represent the two pharmaceutically active steroids in E. tirucalli. To uncover the molecular mechanism underlying this tissue-specificity for phytochemicals, a comprehensive E. tirucalli transcriptome derived from its root, stem, leaf and latex was constructed, and a total of 91,619 unigenes were generated with 51.08% being successfully annotated against the non-redundant (Nr) protein database. A comparison of the transcriptome from different tissues discovered members of unigenes in the upstream steps of sterol backbone biosynthesis leading to this tissue-specific sterol biosynthesis. Among them, the putative oxidosqualene cyclase (OSC) encoding genes involved in euphol synthesis were notably identified, and their expressions were significantly up-regulated in the latex. In addition, genome-wide differentially expressed genes (DEGs) in the different E. tirucalli tissues were identified. The cluster analysis of those DEGs showed a unique expression pattern in the latex compared with other tissues. The DEGs identified in this study would enrich the insights of sterol biosynthesis and the regulation mechanism of this latex-specificity.
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Affiliation(s)
- Weibo Qiao
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Changfu Li
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
| | - Isidore Mosongo
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Qin Liang
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Mengdi Liu
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xin Wang
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
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30
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Lu Y, Zhou J, Hu T, Zhang Y, Su P, Wang J, Gao W, Huang L. A multifunctional oxidosqualene cyclase from Tripterygium regelii that produces both α- and β-amyrin. RSC Adv 2018; 8:23516-23521. [PMID: 35540266 PMCID: PMC9081704 DOI: 10.1039/c8ra03468k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 06/16/2018] [Indexed: 11/21/2022] Open
Abstract
Tripterygium regelii is a rich source of triterpenoids, containing many types of triterpenes with high chemical diversity and interesting pharmacological properties. The cDNA of the multifunctional oxidosqualene cyclase (TrOSC, GenBank accession number: MH161182), consisting of a 2289 bp open reading frame and coding for 762 amino acids, was cloned from the stems and roots of Tripterygium regelii. Phylogenetic analysis using OSC genes from other plants suggested that TrOSC might be a mixed-amyrin synthase. The coding sequence was cloned into the expression vector pYES2 and transformed into the yeast Saccharomyces cerevisiae. The resulting products were analysed by GC-MS. Surprisingly, although it showed 76% sequence identity to lupeol synthase from Ricinus communis, TrOSC was found to be a multifunctional triterpene synthase producing both α- and β-amyrin, the precursors of ursane and oleanane type triterpenes, respectively. qRT-PCR analysis revealed that the transcript of TrOSC accumulated mainly in roots and stems. Taken together, our findings contribute to the knowledge of key genes in the pentacyclic triterpene biosynthesis pathway. A multifunctional oxidosqualene cyclase was cloned from Tripterygium regelii and identified as a mixed-amyrin synthase, which can produce both α- and β-amyrin.![]()
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Affiliation(s)
- Yun Lu
- School of Traditional Chinese Medicine
- Capital Medical University
- Beijing 100069
- China
| | - Jiawei Zhou
- School of Traditional Chinese Medicine
- Capital Medical University
- Beijing 100069
- China
| | - Tianyuan Hu
- School of Traditional Chinese Medicine
- Capital Medical University
- Beijing 100069
- China
| | - Yifeng Zhang
- School of Traditional Chinese Medicine
- Capital Medical University
- Beijing 100069
- China
- State Key Laboratory of Dao-di Herbs
| | - Ping Su
- State Key Laboratory of Dao-di Herbs
- National Resource Center for Chinese MateriaMedica
- China Academy of ChineseMedical Sciences
- Beijing
- China
| | - Jiadian Wang
- School of Traditional Chinese Medicine
- Capital Medical University
- Beijing 100069
- China
- State Key Laboratory of Dao-di Herbs
| | - Wei Gao
- School of Traditional Chinese Medicine
- Capital Medical University
- Beijing 100069
- China
- Beijing Key Lab of TCM Collateral Disease Theory Research
| | - Luqi Huang
- State Key Laboratory of Dao-di Herbs
- National Resource Center for Chinese MateriaMedica
- China Academy of ChineseMedical Sciences
- Beijing
- China
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31
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Kumar A, Fogelman E, Weissberg M, Tanami Z, Veilleux RE, Ginzberg I. Lanosterol synthase-like is involved with differential accumulation of steroidal glycoalkaloids in potato. PLANTA 2017; 246:1189-1202. [PMID: 28828630 DOI: 10.1007/s00425-017-2763-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Accepted: 08/18/2017] [Indexed: 06/07/2023]
Abstract
Phytosterol homeostasis may be maintained in leaves through diversion of intermediates into glycoalkaloid biosynthesis, whereas in tuber flesh, excess intermediates are catalyzed by tuber-specific StLAS - like , resulting in low tuber glycoalkaloids. Lanosterol synthase (LAS) and cycloartenol synthase (CAS) are phylogenetically related enzymes. Cycloartenol is the accepted precursor leading to cholesterol and phytosterols, and in potato, to steroidal glycoalkaloid (SGA) biosynthesis. LAS was also shown to synthesize some plant sterols, albeit at trace amounts, questioning its role in sterol homeostasis. Presently, a potato LAS-related gene (StLAS-like) was identified and its activity verified in a yeast complementation assay. A transgenic approach with targeted gene expression and metabolic profiling of sterols and SGAs was used. Analyses of StLAS-like transcript levels and StLAS-like-promoter::GUS reporter assays indicated specific expression in tuber flesh tissue. Overexpression of Arabidopsis AtLAS in leaves where the endogenic StLAS-like is not expressed, resulted with increased SGA level and reduced phytosterol level, while in the tuber flesh SGA level was reduced. StLAS-like expression only in tuber flesh may explain the differential accumulation of SGAs in commercial cultivars-low in tubers, high in leaves. In leaves, to maintain phytosterol homeostasis, an excess of intermediates may be diverted into SGA biosynthesis, whereas in tuber flesh these intermediates are catalyzed by tuber-specific StLAS-like instead, resulting in low levels of SGA.
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Affiliation(s)
- Akhilesh Kumar
- Institute of Plant Sciences, ARO, The Volcani Center, P. O. Box 15159, 7505101, Rishon LeZiyyon, Israel
| | - Edna Fogelman
- Institute of Plant Sciences, ARO, The Volcani Center, P. O. Box 15159, 7505101, Rishon LeZiyyon, Israel
| | - Mira Weissberg
- Institute of Plant Sciences, ARO, The Volcani Center, P. O. Box 15159, 7505101, Rishon LeZiyyon, Israel
| | - Zachariah Tanami
- Institute of Plant Sciences, ARO, The Volcani Center, P. O. Box 15159, 7505101, Rishon LeZiyyon, Israel
| | | | - Idit Ginzberg
- Institute of Plant Sciences, ARO, The Volcani Center, P. O. Box 15159, 7505101, Rishon LeZiyyon, Israel.
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32
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Pathway engineering for the production of β-amyrin and cycloartenol in Escherichia coli—a method to biosynthesize plant-derived triterpene skeletons in E. coli. Appl Microbiol Biotechnol 2017; 101:6615-6625. [DOI: 10.1007/s00253-017-8409-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 06/20/2017] [Accepted: 06/27/2017] [Indexed: 10/19/2022]
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33
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Navarro Gallón SM, Elejalde-Palmett C, Daudu D, Liesecke F, Jullien F, Papon N, Dugé de Bernonville T, Courdavault V, Lanoue A, Oudin A, Glévarec G, Pichon O, Clastre M, St-Pierre B, Atehortùa L, Yoshikawa N, Giglioli-Guivarc'h N, Besseau S. Virus-induced gene silencing of the two squalene synthase isoforms of apple tree (Malus × domestica L.) negatively impacts phytosterol biosynthesis, plastid pigmentation and leaf growth. PLANTA 2017; 246:45-60. [PMID: 28349256 DOI: 10.1007/s00425-017-2681-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 03/17/2017] [Indexed: 05/24/2023]
Abstract
The use of a VIGS approach to silence the newly characterized apple tree SQS isoforms points out the biological function of phytosterols in plastid pigmentation and leaf development. Triterpenoids are beneficial health compounds highly accumulated in apple; however, their metabolic regulation is poorly understood. Squalene synthase (SQS) is a key branch point enzyme involved in both phytosterol and triterpene biosynthesis. In this study, two SQS isoforms were identified in apple tree genome. Both isoforms are located at the endoplasmic reticulum surface and were demonstrated to be functional SQS enzymes using an in vitro activity assay. MdSQS1 and MdSQS2 display specificities in their expression profiles with respect to plant organs and environmental constraints. This indicates a possible preferential involvement of each isoform in phytosterol and/or triterpene metabolic pathways as further argued using RNAseq meta-transcriptomic analyses. Finally, a virus-induced gene silencing (VIGS) approach was used to silence MdSQS1 and MdSQS2. The concomitant down-regulation of both MdSQS isoforms strongly affected phytosterol synthesis without alteration in triterpene accumulation, since triterpene-specific oxidosqualene synthases were found to be up-regulated to compensate metabolic flux reduction. Phytosterol deficiencies in silenced plants clearly disturbed chloroplast pigmentation and led to abnormal development impacting leaf division rather than elongation or differentiation. In conclusion, beyond the characterization of two SQS isoforms in apple tree, this work brings clues for a specific involvement of each isoform in phytosterol and triterpene pathways and emphasizes the biological function of phytosterols in development and chloroplast integrity. Our report also opens the door to metabolism studies in Malus domestica using the apple latent spherical virus-based VIGS method.
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Affiliation(s)
- Sandra M Navarro Gallón
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
- Laboratorio de Biotecnologıa, Sede de Investigacion Universitaria, Universidad de Antioquia, Medellin, Colombia
| | - Carolina Elejalde-Palmett
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Dimitri Daudu
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Franziska Liesecke
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Frédéric Jullien
- EA3061 Laboratoire de Biotechnologies Végétales appliquées aux plantes aromatiques et médicinales, Université Jean Monnet de Saint Etienne, Saint Etienne, France
| | - Nicolas Papon
- EA3142 Groupe d'Etude des Interactions Hôte-Pathogène, Université d'Angers, Angers, France
| | | | - Vincent Courdavault
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Arnaud Lanoue
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Audrey Oudin
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Gaëlle Glévarec
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Olivier Pichon
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Marc Clastre
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Benoit St-Pierre
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France
| | - Lucia Atehortùa
- Laboratorio de Biotecnologıa, Sede de Investigacion Universitaria, Universidad de Antioquia, Medellin, Colombia
| | | | | | - Sébastien Besseau
- EA2106 Biomolécules et Biotechnologies Végétales, Université François Rabelais de Tours, Tours, France.
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Lee YS, Park HS, Lee DK, Jayakodi M, Kim NH, Koo HJ, Lee SC, Kim YJ, Kwon SW, Yang TJ. Integrated Transcriptomic and Metabolomic Analysis of Five Panax ginseng Cultivars Reveals the Dynamics of Ginsenoside Biosynthesis. FRONTIERS IN PLANT SCIENCE 2017; 8:1048. [PMID: 28674547 PMCID: PMC5474932 DOI: 10.3389/fpls.2017.01048] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 05/31/2017] [Indexed: 05/23/2023]
Abstract
Panax ginseng C.A. Meyer is a traditional medicinal herb that produces bioactive compounds such as ginsenosides. Here, we investigated the diversity of ginsenosides and related genes among five genetically fixed inbred ginseng cultivars (Chunpoong [CP], Cheongsun [CS], Gopoong [GO], Sunhyang [SH], and Sunun [SU]). To focus on the genetic diversity related to ginsenoside biosynthesis, we utilized in vitro cultured adventitious roots from the five cultivars grown under controlled environmental conditions. PCA loading plots based on secondary metabolite composition classified the five cultivars into three groups. We selected three cultivars (CS, SH, and SU) to represent the three groups and conducted further transcriptome and gas chromatography-mass spectrometry analyses to identify genes and intermediates corresponding to the variation in ginsenosides among cultivars. We quantified ginsenoside contents from the three cultivars. SH had more than 12 times the total ginsenoside content of CS, with especially large differences in the levels of panaxadiol-type ginsenosides. The expression levels of genes encoding squalene epoxidase (SQE) and dammarenediol synthase (DDS) were also significantly lower in CS than SH and SU, which is consistent with the low levels of ginsenoside produced in this cultivar. Methyl jasmonate (MeJA) treatment increased the levels of panaxadiol-type ginsenosides up to 4-, 13-, and 31-fold in SH, SU, and CS, respectively. MeJA treatment also greatly increased the quantity of major intermediates and the expression of the underlying genes in the ginsenoside biosynthesis pathway; these intermediates included squalene, 2,3-oxidosqualene, and dammarenediol II, especially in CS, which had the lowest ginsenoside content under normal culture conditions. We conclude that SQE and DDS are the most important genetic factors for ginsenoside biosynthesis with diversity among ginseng cultivars.
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Affiliation(s)
- Yun Sun Lee
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Hyun-Seung Park
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Dong-Kyu Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National UniversitySeoul, South Korea
| | - Murukarthick Jayakodi
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Nam-Hoon Kim
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Hyun Jo Koo
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Sang-Choon Lee
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Yeon Jeong Kim
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Sung Won Kwon
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National UniversitySeoul, South Korea
| | - Tae-Jin Yang
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
- Crop Biotechnology Institute/GreenBio Science and Technology, Seoul National UniversityPyeongchang, South Korea
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Ciura J, Szeliga M, Grzesik M, Tyrka M. Next-generation sequencing of representational difference analysis products for identification of genes involved in diosgenin biosynthesis in fenugreek (Trigonella foenum-graecum). PLANTA 2017; 245:977-991. [PMID: 28161815 PMCID: PMC5393294 DOI: 10.1007/s00425-017-2657-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 01/30/2017] [Indexed: 05/21/2023]
Abstract
Representational difference analysis of cDNA was performed and differential products were sequenced and annotated. Candidate genes involved in biosynthesis of diosgenin in fenugreek were identified. Detailed mechanism of diosgenin synthesis was proposed. Fenugreek (Trigonella foenum-graecum L.) is a valuable medicinal and crop plant. It belongs to Fabaceae family and has a unique potential to synthesize valuable steroidal saponins, e.g., diosgenin. Elicitation (methyl jasmonate) and precursor feeding (cholesterol and squalene) were used to enhance the content of sterols and steroidal sapogenins in in vitro grown plants for representational difference analysis of cDNA (cDNA-RDA). To identify candidate genes involved in diosgenin biosynthesis, differential, factor-specific libraries were subject to the next-generation sequencing. Approximately 9.9 million reads were obtained, trimmed, and assembled into 31,491 unigenes with an average length of 291 bp. Then, functional annotation and gene ontogeny enrichment analysis was performed by aligning all-unigenes with public databases. Within the transcripts related to sterol and steroidal saponin biosynthesis, we discovered novel candidate genes of diosgenin biosynthesis and validated their expression using quantitative RT-PCR analysis. Based on these findings, we supported the idea that diosgenin is biosynthesized from cycloartenol via cholesterol. This is the first report on the next-generation sequencing of cDNA-RDA products. Analysis of the transcriptomes enriched in low copy sequences contributed substantially to our understanding of the biochemical pathways of steroid synthesis in fenugreek.
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Affiliation(s)
- Joanna Ciura
- Department of Biotechnology and Bioinformatics, Faculty of Chemistry, Rzeszow University of Technology, al. Powstańców Warszawy 6, 35-959, Rzeszów, Poland
| | - Magdalena Szeliga
- Department of Biotechnology and Bioinformatics, Faculty of Chemistry, Rzeszow University of Technology, al. Powstańców Warszawy 6, 35-959, Rzeszów, Poland
| | - Michalina Grzesik
- Department of Biotechnology and Bioinformatics, Faculty of Chemistry, Rzeszow University of Technology, al. Powstańców Warszawy 6, 35-959, Rzeszów, Poland
| | - Mirosław Tyrka
- Department of Biotechnology and Bioinformatics, Faculty of Chemistry, Rzeszow University of Technology, al. Powstańców Warszawy 6, 35-959, Rzeszów, Poland.
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Zhang J, Li X, Lu F, Wang S, An Y, Su X, Li X, Ma L, Han G. De novo Sequencing and Transcriptome Analysis Reveal Key Genes Regulating Steroid Metabolism in Leaves, Roots, Adventitious Roots and Calli of Periploca sepium Bunge. FRONTIERS IN PLANT SCIENCE 2017; 8:594. [PMID: 28484475 PMCID: PMC5399629 DOI: 10.3389/fpls.2017.00594] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 03/31/2017] [Indexed: 06/07/2023]
Abstract
Periploca sepium Bunge is a traditional medicinal plant, whose root bark is important for Chinese herbal medicine. Its major bioactive compounds are C21 steroids and periplocin, a kind of cardiac glycoside, which are derived from the steroid synthesis pathway. However, research on P. sepium genome or transcriptomes and their related genes has been lacking for a long time. In this study we estimated this species nuclear genome size at 170 Mb (using flow cytometry). Then, RNA sequencing of four different tissue samples of P. sepium (leaves, roots, adventitious roots, and calli) was done using the sequencing platform Illumina/Solexa Hiseq 2,500. After de novo assembly and quantitative assessment, 90,375 all-transcripts and 71,629 all-unigenes were finally generated. Annotation efforts that used a number of public databases resulted in detailed annotation information for the transcripts. In addition, differentially expressed genes (DEGs) were identified by using digital gene profiling based on the reads per kilobase of transcript per million reads mapped (RPKM) values. Compared with the leaf samples (L), up-regulated genes and down-regulated genes were eventually obtained. To deepen our understanding of these DEGs, we performed two enrichment analyses: gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG). Here, the analysis focused upon the expression characteristics of those genes involved in the terpene metabolic pathway and the steroid biosynthesis pathway, to better elucidate the molecular mechanism of bioactive steroid synthesis in P. sepium. The bioinformatics analysis enabled us to find many genes that are involved in bioactive steroid biosynthesis. These genes encoded acetyl-CoA acetyltransferase (ACAT), HMG-CoA synthase (HMGS), HMG-CoA reductase (HMGR), mevalonate kinase (MK), phosphomevalonate kinase (PMK), mevalonate diphosphate decarboxylase (MDD), isopentenylpyrophosphate isomerase (IPPI), farnesyl pyrophosphate synthase (FPS), squalene synthase (SS), squalene epoxidase (SE), cycloartenol synthase (CAS), sterol C-24 methyltransferase (SMT1), sterol-4alpha-methyl oxidase 1 (SMO1), sterol 14alpha-demethylase (CYP51/14-SDM), delta(14)-sterol reductase (FK/14SR), C-8,7 sterol isomerase (HYD1), sterol-4alpha-methyl oxidase 2 (SMO2), delta(7)-sterol-C5(6)-desaturase (STE1/SC5DL), 7-dehydrocholesterol reductase (DWF5/DHCR7), delta (24)-sterol reductase (DWF1/DHCR24), sterol 22-desaturase (CYP710A), progesterone 5beta-reductase (5β-POR), 3-beta-hydroxysteroid dehydrogenase (3β-HSD). This research will be helpful to further understand the mechanism of bioactive steroid biosynthesis in P. sepium, namely C21 steroid and periplocin biosynthesis.
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Affiliation(s)
- Jian Zhang
- Key Lab of Industrial Fermentation Microbiology, Tianjin University of Science and Technology, Ministry of EducationTianjin, China
- School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese MedicineTianjin, China
- College of Bioengineering, Tianjin University of Science and TechnologyTianjin, China
| | - Xinglin Li
- Key Lab of Industrial Fermentation Microbiology, Tianjin University of Science and Technology, Ministry of EducationTianjin, China
- College of Bioengineering, Tianjin University of Science and TechnologyTianjin, China
| | - Fuping Lu
- Key Lab of Industrial Fermentation Microbiology, Tianjin University of Science and Technology, Ministry of EducationTianjin, China
- College of Bioengineering, Tianjin University of Science and TechnologyTianjin, China
| | - Shanying Wang
- Key Lab of Industrial Fermentation Microbiology, Tianjin University of Science and Technology, Ministry of EducationTianjin, China
- College of Bioengineering, Tianjin University of Science and TechnologyTianjin, China
| | - Yunhe An
- Beijing Center for Physical and Chemical AnalysisBeijing, China
| | - Xiaoxing Su
- Beijing Center for Physical and Chemical AnalysisBeijing, China
| | - Xiankuan Li
- School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese MedicineTianjin, China
| | - Lin Ma
- School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese MedicineTianjin, China
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Laboratory evaluation of Clusia fluminensis extracts and their isolated compounds against Dysdercus peruvianus and Oncopeltus fasciatus. REVISTA BRASILEIRA DE FARMACOGNOSIA 2017. [DOI: 10.1016/j.bjp.2016.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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38
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Affiliation(s)
- Thomas J Bach
- CNRS-IBMP, Université de Strasbourg, Institut de Botanique, F-67000 Strasbourg, France
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Dahlin P, Srivastava V, Bulone V, McKee LS. The Oxidosqualene Cyclase from the Oomycete Saprolegnia parasitica Synthesizes Lanosterol as a Single Product. Front Microbiol 2016; 7:1802. [PMID: 27881978 PMCID: PMC5101207 DOI: 10.3389/fmicb.2016.01802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 10/27/2016] [Indexed: 11/29/2022] Open
Abstract
The first committed step of sterol biosynthesis is the cyclisation of 2,3-oxidosqualene to form either lanosterol (LA) or cycloartenol (CA). This is catalyzed by an oxidosqualene cyclase (OSC). LA and CA are subsequently converted into various sterols by a series of enzyme reactions. The specificity of the OSC therefore determines the final composition of the end sterols of an organism. Despite the functional importance of OSCs, the determinants of their specificity are not well understood. In sterol-synthesizing oomycetes, recent bioinformatics, and metabolite analysis suggest that LA is produced. However, this catalytic activity has never been experimentally demonstrated. Here, we show that the OSC of the oomycete Saprolegnia parasitica, a severe pathogen of salmonid fish, has an uncommon sequence in a conserved motif important for specificity. We present phylogenetic analysis revealing that this sequence is common to sterol-synthesizing oomycetes, as well as some plants, and hypothesize as to the evolutionary origin of some microbial sequences. We also demonstrate for the first time that a recombinant form of the OSC from S. parasitica produces LA exclusively. Our data pave the way for a detailed structural characterization of the protein and the possible development of specific inhibitors of oomycete OSCs for disease control in aquaculture.
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Affiliation(s)
- Paul Dahlin
- Division of Glycoscience, School of Biotechnology, KTH Royal Institute of TechnologyStockholm, Sweden; Department of Ecology, Environment and Plant Sciences, Stockholm UniversityStockholm, Sweden
| | - Vaibhav Srivastava
- Division of Glycoscience, School of Biotechnology, KTH Royal Institute of Technology Stockholm, Sweden
| | - Vincent Bulone
- Division of Glycoscience, School of Biotechnology, KTH Royal Institute of TechnologyStockholm, Sweden; ARC Centre of Excellence in Plant Cell Walls, School of Agriculture, Food and Wine, The University of Adelaide, UrrbraeSA, Australia
| | - Lauren S McKee
- Division of Glycoscience, School of Biotechnology, KTH Royal Institute of TechnologyStockholm, Sweden; Wallenberg Wood Science Centre, KTH Royal Institute of TechnologyStockholm, Sweden
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Gas-Pascual E, Simonovik B, Schaller H, Bach TJ. Inhibition of Cycloartenol Synthase (CAS) Function in Tobacco BY-2 Cells. Lipids 2015; 50:761-72. [PMID: 26033687 DOI: 10.1007/s11745-015-4036-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 05/15/2015] [Indexed: 01/06/2023]
Abstract
Tobacco BY-2 cell suspensions are our preferred model for studying isoprenoid biosynthesis pathways, due to their easy genetic transformation and the efficient absorption of metabolic precursors, intermediates, and/or inhibitors. Using this model system, we have analyzed the effects of chemical and genetic blockage of cycloartenol synthase (CAS, EC 5.4.99.8), an oxidosqualene cyclase that catalyzes the first committed step in the sterol pathway of plants. BY-2 cells were treated with RO 48-8071, a potent inhibitor of oxidosqualene cyclization. Short-term treatments (24 h) resulted in accumulation of oxidosqualene with no changes in the final sterol products. Interestingly, long-term treatments (6 days) induced down-regulation in gene expression not only of CAS but also of the SMT2 gene coding sterol methyltransferase 2 (EC 2.1.1.41). This explains some of the increase in 24-methyl sterols at the expense of the 24-ethyl sterols stigmasterol and sitosterol. In our alternative strategy, CAS gene expression was partially blocked by using an inducible artificial microRNA. The limited effectiveness of this approach might be explained by some dependence of the machinery for RNAi formation on an operating MVA/sterol pathway. For comparison we checked the effect of RO 48-8071 on a green cell suspension of Arabidopsis and on seedlings, containing a small spectrum of triterpenes besides phytosterols. Triterpenes remained essentially unaffected, but phytosterol accumulation was clearly diminished.
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Affiliation(s)
- Elisabet Gas-Pascual
- Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH, 44691, USA
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41
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Singh B, Sharma RA. Plant terpenes: defense responses, phylogenetic analysis, regulation and clinical applications. 3 Biotech 2015; 5:129-151. [PMID: 28324581 PMCID: PMC4362742 DOI: 10.1007/s13205-014-0220-2] [Citation(s) in RCA: 197] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 04/10/2014] [Indexed: 12/11/2022] Open
Abstract
The terpenoids constitute the largest class of natural products and many interesting products are extensively applied in the industrial sector as flavors, fragrances, spices and are also used in perfumery and cosmetics. Many terpenoids have biological activities and also used for medical purposes. In higher plants, the conventional acetate-mevalonic acid pathway operates mainly in the cytosol and mitochondria and synthesizes sterols, sesquiterpenes and ubiquinones mainly. In the plastid, the non-mevalonic acid pathway takes place and synthesizes hemi-, mono-, sesqui-, and diterpenes along with carotenoids and phytol tail of chlorophyll. In this review paper, recent developments in the biosynthesis of terpenoids, indepth description of terpene synthases and their phylogenetic analysis, regulation of terpene biosynthesis as well as updates of terpenes which have entered in the clinical studies are reviewed thoroughly.
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Affiliation(s)
- Bharat Singh
- AIB, Amity University Rajasthan, NH-11C, Kant Kalwar, Jaipur, 303 002, India.
| | - Ram A Sharma
- Department of Botany, University of Rajasthan, Jaipur, 302 055, India
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42
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Kim YJ, Zhang D, Yang DC. Biosynthesis and biotechnological production of ginsenosides. Biotechnol Adv 2015; 33:717-35. [PMID: 25747290 DOI: 10.1016/j.biotechadv.2015.03.001] [Citation(s) in RCA: 205] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 02/28/2015] [Accepted: 03/01/2015] [Indexed: 12/20/2022]
Abstract
Medicinal plants are essential for improving human health, and around 75% of the population in developing countries relies mainly on herb-based medicines for health care. As the king of herb plants, ginseng has been used for nearly 5,000 years in the oriental and recently in western medicines. Among the compounds studied in ginseng plants, ginsenosides have been shown to have multiple medical effects such as anti-oxidative, anti-aging, anti-cancer, adaptogenic and other health-improving activities. Ginsenosides belong to a group of triterpene saponins (also called ginseng saponins) that are found almost exclusively in Panax species and accumulated especially in the plant roots. In this review, we update the conserved and diversified pathway/enzyme biosynthesizing ginsenosides which have been presented. Particularly, we highlight recent milestone works on functional characterization of key genes dedicated to the production of ginsenosides, and their application in engineering plants and yeast cells for large-scale production of ginsenosides.
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Affiliation(s)
- Yu-Jin Kim
- Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; Department of Oriental Medicinal Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea
| | - Dabing Zhang
- Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Urrbrae, South Australia 5064, Australia.
| | - Deok-Chun Yang
- Department of Oriental Medicinal Biotechnology and Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Youngin, 446-701, South Korea.
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Wagatsuma T, Khan MSH, Watanabe T, Maejima E, Sekimoto H, Yokota T, Nakano T, Toyomasu T, Tawaraya K, Koyama H, Uemura M, Ishikawa S, Ikka T, Ishikawa A, Kawamura T, Murakami S, Ueki N, Umetsu A, Kannari T. Higher sterol content regulated by CYP51 with concomitant lower phospholipid content in membranes is a common strategy for aluminium tolerance in several plant species. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:907-18. [PMID: 25416794 PMCID: PMC4321553 DOI: 10.1093/jxb/eru455] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Several studies have shown that differences in lipid composition and in the lipid biosynthetic pathway affect the aluminium (Al) tolerance of plants, but little is known about the molecular mechanisms underlying these differences. Phospholipids create a negative charge at the surface of the plasma membrane and enhance Al sensitivity as a result of the accumulation of positively charged Al(3+) ions. The phospholipids will be balanced by other electrically neutral lipids, such as sterols. In the present research, Al tolerance was compared among pea (Pisum sativum) genotypes. Compared with Al-tolerant genotypes, the Al-sensitive genotype accumulated more Al in the root tip, had a less intact plasma membrane, and showed a lower expression level of PsCYP51, which encodes obtusifoliol-14α-demethylase (OBT 14DM), a key sterol biosynthetic enzyme. The ratio of phospholipids to sterols was higher in the sensitive genotype than in the tolerant genotypes, suggesting that the sterol biosynthetic pathway plays an important role in Al tolerance. Consistent with this idea, a transgenic Arabidopsis thaliana line with knocked-down AtCYP51 expression showed an Al-sensitive phenotype. Uniconazole-P, an inhibitor of OBT 14DM, suppressed the Al tolerance of Al-tolerant genotypes of maize (Zea mays), sorghum (Sorghum bicolor), rice (Oryza sativa), wheat (Triticum aestivum), and triticale (×Triticosecale Wittmark cv. Currency). These results suggest that increased sterol content, regulated by CYP51, with concomitant lower phospholipid content in the root tip, results in lower negativity of the plasma membrane. This appears to be a common strategy for Al tolerance among several plant species.
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Affiliation(s)
- Tadao Wagatsuma
- Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan
| | | | - Toshihiro Watanabe
- Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Eriko Maejima
- Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Hitoshi Sekimoto
- Faculty of Agriculture, Utsunomiya University, Utsunomiya 321-8505, Japan
| | - Takao Yokota
- Department of Bioscience, Teikyo University, Utsunomiya 320-8551, Japan
| | - Takeshi Nakano
- Antibiotics Laboratory RIKEN, Wako, Saitama 351-0198, Japan; RIKEN Centre for Sustainable Resource Science, Wako, Saitama 351-0198, Japan; CREST, Japan Science and Technology Agency (JST), Japan
| | - Tomonobu Toyomasu
- Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan
| | - Keitaro Tawaraya
- Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan
| | - Hiroyuki Koyama
- Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Matsuo Uemura
- Cryobiosystem Research Centre, Faculty of Agriculture, Iwate University, Morioka 020-8550, Japan
| | - Satoru Ishikawa
- National Institute for Agro-Environmental Science, Tsukuba 305-8604, Japan
| | - Takashi Ikka
- Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan
| | - Akifumi Ishikawa
- Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan
| | - Takeshi Kawamura
- Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan
| | - Satoshi Murakami
- Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Nozomi Ueki
- Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan
| | - Asami Umetsu
- Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan
| | - Takayuki Kannari
- Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan
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Basyuni M, Oku H, Tsujimoto E, Baba S. Cloning and Functional Expression of Cycloartenol Synthases from Mangrove SpeciesRhizophora stylosaGriff. andKandelia candel(L.) Druce. Biosci Biotechnol Biochem 2014; 71:1788-92. [PMID: 17617700 DOI: 10.1271/bbb.70113] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To obtain cDNAs encoding oxidosqualene cyclase (OSC), we cloned two cDNAs, KcCAS and RsCAS, from roots of Kandelia candel (L.) Druce and leaves of Rhizophora stylosa Griff. by homology based PCR method respectively. The deduced amino acid sequences of both OSCs showed 82% homology to cycloartenol synthases from Lotus japonicus (OSC5) and Ricinus cummunis (RcCAS), suggesting that these are cycloartenol synthases of K. candel and R. stylosa. The genes obtained were expressed in a lanosterol synthase deficient Saccharomyces cerevisiae (ERG7) strain, GIL77. GC-MS analysis identified the accumulated reaction product in the yeast transformant to be cycloartenol, indicating that both KcCAS and RsCAS encode cycloartenol synthase.
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Affiliation(s)
- Mohammad Basyuni
- United Graduate School of Agricultural Sciences, Kagoshima University, Korimoto, Kagoshima, Japan
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Thimmappa R, Geisler K, Louveau T, O'Maille P, Osbourn A. Triterpene biosynthesis in plants. ANNUAL REVIEW OF PLANT BIOLOGY 2014; 65:225-57. [PMID: 24498976 DOI: 10.1146/annurev-arplant-050312-120229] [Citation(s) in RCA: 414] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The triterpenes are one of the most numerous and diverse groups of plant natural products. They are complex molecules that are, for the most part, beyond the reach of chemical synthesis. Simple triterpenes are components of surface waxes and specialized membranes and may potentially act as signaling molecules, whereas complex glycosylated triterpenes (saponins) provide protection against pathogens and pests. Simple and conjugated triterpenes have a wide range of applications in the food, health, and industrial biotechnology sectors. Here, we review recent developments in the field of triterpene biosynthesis, give an overview of the genes and enzymes that have been identified to date, and discuss strategies for discovering new triterpene biosynthetic pathways.
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Affiliation(s)
- Ramesha Thimmappa
- Department of Metabolic Biology, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom;
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Kang NY, Cho C, Kim J. Inducible expression of Arabidopsis response regulator 22 (ARR22), a type-C ARR, in transgenic Arabidopsis enhances drought and freezing tolerance. PLoS One 2013; 8:e79248. [PMID: 24244460 PMCID: PMC3828410 DOI: 10.1371/journal.pone.0079248] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 09/20/2013] [Indexed: 12/14/2022] Open
Abstract
The Arabidopsis two-component signaling system, which is comprised of sensor histidine kinases, histidine phosphotransfer proteins, and response regulators, mediates cytokinin response as well as various other plant responses including abiotic stress responses. Arabidopsis response regulators (ARRs) are classified into type-A, -B, and -C. Although the roles of type-A and -B ARRs are well established in Arabidopsis plant signaling, roles of type-C ARRs, ARR22 and ARR24, remain elusive. ARR22, a preferentially cytosolic protein, interacts with certain Arabidopsis histidine phosphotransfer proteins (AHPs) and displays phosphatase activity on AHP5. ARR22 is induced by cold and dehydration. Here, we show that inducible overexpression of ARR22 in Arabidopsis enhanced dehydration, drought, and cold tolerance in a dexamethasone-dependent manner, whereas mutation of the putative phospho-accepting Asp to Asn in ARR22 (ARR22D74N) abolished these tolerance phenotypes. Overexpression of ARR22 decreased electrolyte leakage in dehydration-, drought-, or cold-stressed transgenic Arabidopsis plants compared with that of ARR22D74N or compared with wild-type plants. Transpiration rates and stomatal apertures were not affected by ARR22 overexpression. No significant difference in both dehydration and freezing tolerance was observed between wild-type and arr22 mutants with or without cytokinin preincubation, consistent with the lack of phenotypes of arr22 mutants in their vegetative development. Meta-profile analyses of the microarray data on ARR22-responsive genes indicate that ARR22 modulates expression of a variety of abiotic stress-responsive genes, which might contribute to increasing drought and freezing tolerance. Taken together, these results suggest that ARR22 plays a positive role in the stress tolerance response in part via enhancing cell membrane integrity and that phospho-histidine phosphatase activity of ARR22 may be required for this function.
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Affiliation(s)
- Na Young Kang
- Department of Bioenergy Science and Technology and Kumho Life Science Laboratory, Chonnam National University, Buk-Gu, Gwangju, Korea
| | - Chuloh Cho
- Department of Bioenergy Science and Technology and Kumho Life Science Laboratory, Chonnam National University, Buk-Gu, Gwangju, Korea
| | - Jungmook Kim
- Department of Bioenergy Science and Technology and Kumho Life Science Laboratory, Chonnam National University, Buk-Gu, Gwangju, Korea
- * E-mail:
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Abstract
Ginsenosides, the major bioactive ingredients of P. ginseng can improve the anti-disease abilities of human being, and generate significant social and economic benefits. However, along with gradually or rapidly or dramatically increasing demand of the ginsenosides, extensive studies have focused on regulating the ginsenoside biosynthetic pathway on a genetic level. This review provides the latest research progress on biosynthetic pathway of ginsenosides, including the mevalonate (MVA) and the methylerythritol phosphate (MEP) pathway, which is newly discovered and located in P. ginseng. Moreover, it also indicated lanosterol synthase metabolic flux present in P. ginseng.
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Jäpelt RB, Jakobsen J. Vitamin D in plants: a review of occurrence, analysis, and biosynthesis. FRONTIERS IN PLANT SCIENCE 2013; 4:136. [PMID: 23717318 PMCID: PMC3651966 DOI: 10.3389/fpls.2013.00136] [Citation(s) in RCA: 138] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 04/22/2013] [Indexed: 05/20/2023]
Abstract
The major function of vitamin D in vertebrates is maintenance of calcium homeostasis, but vitamin D insufficiency has also been linked to an increased risk of hypertension, autoimmune diseases, diabetes, and cancer. Therefore, there is a growing awareness about vitamin D as a requirement for optimal health. Vitamin D3 is synthesized in the skin by a photochemical conversion of provitamin D3, but the necessary rays are only emitted all year round in places that lie below a 35° latitude. Unfortunately, very few food sources naturally contain vitamin D and the general population as a results fail to meet the requirements. Fish have the highest natural content of vitamin D expected to derive from an accumulation in the food chain originating from microalgae. Microalgae contain both vitamin D3 and provitamin D3, which suggests that vitamin D3 exist in the plant kingdom and vitamin D3 has also been identified in several plant species as a surprise to many. The term vitamin D also includes vitamin D2 that is produced in fungi and yeasts by UVB-exposure of provitamin D2. Small amounts can be found in plants contaminated with fungi and traditionally only vitamin D2 has been considered present in plants. This review summarizes the current knowledge on sterol biosynthesis leading to provitamin D. It also addresses the occurrence of vitamin D and its hydroxylated metabolites in higher plants and in algae and discusses limitations and advantages of analytical methods used in studies of vitamin D and related compounds including recent advances in analytical technologies. Finally, perspectives for a future production of vitamin D biofortified fruits, vegetables, and fish will be presented.
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Affiliation(s)
- Rie B. Jäpelt
- Division of Food Chemistry, National Food Institute, Technical University of DenmarkSøborg, Denmark
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Go YS, Lee SB, Kim HJ, Kim J, Park HY, Kim JK, Shibata K, Yokota T, Ohyama K, Muranaka T, Arseniyadis S, Suh MC. Identification of marneral synthase, which is critical for growth and development in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2012; 72:791-804. [PMID: 22882494 DOI: 10.1111/j.1365-313x.2012.05120.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Plants produce structurally diverse triterpenoids, which are important for their life and survival. Most triterpenoids and sterols share a common biosynthetic intermediate, 2,3-oxidosqualene (OS), which is cyclized by 2,3-oxidosqualene cyclase (OSC). To investigate the role of an OSC, marneral synthase 1 (MRN1), in planta, we characterized a Arabidopsis mrn1 knock-out mutant displaying round-shaped leaves, late flowering, and delayed embryogenesis. Reduced growth of mrn1 was caused by inhibition of cell expansion and elongation. Marnerol, a reduced form of marneral, was detected in Arabidopsis overexpressing MRN1, but not in the wild type or mrn1. Alterations in the levels of sterols and triterpenols and defects in membrane integrity and permeability were observed in the mrn1. In addition, GUS expression, under the control of the MRN1 gene promoter, was specifically detected in shoot and root apical meristems, which are responsible for primary growth, and the mRNA expression of Arabidopsis clade II OSCs was preferentially observed in roots and siliques containing developing seeds. The eGFP:MRN1 was localized to the endoplasmic reticulum in tobacco protoplasts. Taken together, this report provides evidence that the unusual triterpenoid pathway via marneral synthase is important for the growth and development of Arabidopsis.
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Affiliation(s)
- Young S Go
- Department of Plant Biotechnology, Chonnam National University, Gwangju 500-757, Korea
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Abstract
Saponins are one of the most numerous and diverse groups of plant natural products. They serve a range of ecological roles including plant defence against disease and herbivores and possibly as allelopathic agents in competitive interactions between plants. Some saponins are also important pharmaceuticals, and the underexplored biodiversity of plant saponins is likely to prove to be a vital resource for future drug discovery. The biological activity of saponins is normally attributed to the amphipathic properties of these molecules, which consist of a hydrophobic triterpene or sterol backbone and a hydrophilic carbohydrate chain, although some saponins are known to have potent biological activities that are dependent on other aspects of their structure. This chapter will focus on the biological activity and the synthesis of some of the best-studied examples of plant saponins and on recent developments in the identification of the genes and enzymes responsible for saponin synthesis.
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