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Dossou SSK, Song S, Liu A, Li D, Zhou R, Berhe M, Zhang Y, Sheng C, Wang Z, You J, Wang L. Resequencing of 410 Sesame Accessions Identifies SINST1 as the Major Underlying Gene for Lignans Variation. Int J Mol Sci 2023; 24:1055. [PMID: 36674569 PMCID: PMC9860558 DOI: 10.3390/ijms24021055] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 01/06/2023] Open
Abstract
Sesame is a promising oilseed crop that produces specific lignans of clinical importance. Hence, a molecular description of the regulatory mechanisms of lignan biosynthesis is essential for crop improvement. Here, we resequence 410 sesame accessions and identify 5.38 and 1.16 million SNPs (single nucleotide polymorphisms) and InDels, respectively. Population genomic analyses reveal that sesame has evolved a geographic pattern categorized into northern (NC), middle (MC), and southern (SC) groups, with potential origin in the southern region and subsequent introduction to the other regions. Selective sweeps analysis uncovers 120 and 75 significant selected genomic regions in MC and NC groups, respectively. By screening these genomic regions, we unveiled 184 common genes positively selected in these subpopulations for exploitation in sesame improvement. Genome-wide association study identifies 17 and 72 SNP loci for sesamin and sesamolin variation, respectively, and 11 candidate causative genes. The major pleiotropic SNPC/A locus for lignans variation is located in the exon of the gene SiNST1. Further analyses revealed that this locus was positively selected in higher lignan content sesame accessions, and the "C" allele is favorable for a higher accumulation of lignans. Overexpression of SiNST1C in sesame hairy roots significantly up-regulated the expression of SiMYB58, SiMYB209, SiMYB134, SiMYB276, and most of the monolignol biosynthetic genes. Consequently, the lignans content was significantly increased, and the lignin content was slightly increased. Our findings provide insights into lignans and lignin regulation in sesame and will facilitate molecular breeding of elite varieties and marker-traits association studies.
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Affiliation(s)
- Senouwa Segla Koffi Dossou
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
- Laboratory of Plant Physiology and Biotechnologies, Faculty of Sciences, University of Lomé, Lomé 01BP 1515, Togo
| | - Shengnan Song
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Aili Liu
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Donghua Li
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Rong Zhou
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Muez Berhe
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Yanxin Zhang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Chen Sheng
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Zhijian Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Jun You
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Linhai Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
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Lallement PA, Roret T, Tsan P, Gualberto JM, Girardet JM, Didierjean C, Rouhier N, Hecker A. Insights into ascorbate regeneration in plants: investigating the redox and structural properties of dehydroascorbate reductases from Populus trichocarpa. Biochem J 2016; 473:717-31. [PMID: 26699905 DOI: 10.1042/bj20151147] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 12/23/2015] [Indexed: 12/20/2022]
Abstract
Dehydroascorbate reductases (DHARs), enzymes belonging to the GST superfamily, catalyse the GSH-dependent reduction of dehydroascorbate into ascorbate in plants. By maintaining a reduced ascorbate pool, they notably participate to H2O2 detoxification catalysed by ascorbate peroxidases (APXs). Despite this central role, the catalytic mechanism used by DHARs is still not well understood and there is no supportive 3D structure. In this context, we have performed a thorough biochemical and structural analysis of the three poplar DHARs and coupled this to the analysis of their transcript expression patterns and subcellular localizations. The transcripts for these genes are mainly detected in reproductive and green organs and the corresponding proteins are expressed in plastids, in the cytosol and in the nucleus, but not in mitochondria and peroxisomes where ascorbate regeneration is obviously necessary. Comparing the kinetic properties and the sensitivity to GSSG-mediated oxidation of DHAR2 and DHAR3A, exhibiting 1 or 3 cysteinyl residues respectively, we observed that the presence of additional cysteines in DHAR3A modifies the regeneration mechanism of the catalytic cysteine by forming different redox states. Finally, from the 3D structure of DHAR3A solved by NMR, we were able to map the residues important for the binding of both substrates (GSH and DHA), showing that DHAR active site is very selective for DHA recognition and providing further insights into the catalytic mechanism and the roles of the additional cysteines found in some DHARs.
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Affiliation(s)
- Pierre-Alexandre Lallement
- Université de Lorraine, UMR 1136 Interactions Arbres/Microorganismes, Faculté des Sciences et Technologies, 54506 Vandœuvre-lès-Nancy, France INRA, UMR 1136 Interactions Arbres/Microorganismes, Centre INRA Nancy Lorraine, 54280 Champenoux, France
| | - Thomas Roret
- Université de Lorraine, UMR 1136 Interactions Arbres/Microorganismes, Faculté des Sciences et Technologies, 54506 Vandœuvre-lès-Nancy, France INRA, UMR 1136 Interactions Arbres/Microorganismes, Centre INRA Nancy Lorraine, 54280 Champenoux, France
| | - Pascale Tsan
- Université de Lorraine, CRM2, UMR 7036, 54506 Vandœuvre-lès-Nancy, France CNRS, CRM2, UMR 7036, 54506 Vandœuvre-lès-Nancy, France
| | - José M Gualberto
- Institut de Biologie Moléculaire des Plantes, CNRS-UPR 2357, 67084 Strasbourg, France
| | - Jean-Michel Girardet
- Université de Lorraine, UMR 1136 Interactions Arbres/Microorganismes, Faculté des Sciences et Technologies, 54506 Vandœuvre-lès-Nancy, France INRA, UMR 1136 Interactions Arbres/Microorganismes, Centre INRA Nancy Lorraine, 54280 Champenoux, France
| | - Claude Didierjean
- Université de Lorraine, CRM2, UMR 7036, 54506 Vandœuvre-lès-Nancy, France CNRS, CRM2, UMR 7036, 54506 Vandœuvre-lès-Nancy, France
| | - Nicolas Rouhier
- Université de Lorraine, UMR 1136 Interactions Arbres/Microorganismes, Faculté des Sciences et Technologies, 54506 Vandœuvre-lès-Nancy, France INRA, UMR 1136 Interactions Arbres/Microorganismes, Centre INRA Nancy Lorraine, 54280 Champenoux, France
| | - Arnaud Hecker
- Université de Lorraine, UMR 1136 Interactions Arbres/Microorganismes, Faculté des Sciences et Technologies, 54506 Vandœuvre-lès-Nancy, France INRA, UMR 1136 Interactions Arbres/Microorganismes, Centre INRA Nancy Lorraine, 54280 Champenoux, France
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Pandey P, Achary VMM, Kalasamudramu V, Mahanty S, Reddy GM, Reddy MK. Molecular and biochemical characterization of dehydroascorbate reductase from a stress adapted C4 plant, pearl millet [Pennisetum glaucum (L.) R. Br]. PLANT CELL REPORTS 2014; 33:435-45. [PMID: 24317405 DOI: 10.1007/s00299-013-1544-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/19/2013] [Accepted: 11/20/2013] [Indexed: 05/20/2023]
Abstract
KEY MESSAGE PgDHAR was isolated from Pennisetum glaucum. PgDHAR responded to abiotic stress and exhibited enzyme activity at broad ranges of temperature, pH and substrate concentrations suggesting its role in stress tolerance. ABSTRACT Dehydroascorbate reductase (EC 1.8.5.1) is a crucial enzyme actively involved in the recycling of ascorbate redox pool in the cellular environment. In this study, the full-length cDNA coding for DHAR polypeptide and its corresponding gene was isolated from Pennisetum glaucum (PgDHAR). PgDHAR encodes a polypeptide of 213 amino acids with a predicted molecular mass of 23.4 kDa and shares 80-75 % sequence homology with DHAR from other plants. The heterologously expressed recombinant PgDHAR protein exhibited activity in a wide range of substrate concentrations. The recombinant PgDHAR is thermostable and retains its activity over a broad pH range. Furthermore, transcript level of PgDHAR is quantitatively up-regulated in response to temperature. On the whole, PgDHAR alone or in combination with other genes of ascorbate-glutathione cycle can be used for the development of stress tolerant as well as nutritionally improved food crop with enhanced ascorbic acid content.
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Affiliation(s)
- Prachi Pandey
- Plant Molecular Biology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110 067, India,
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Functional divergence and catalytic properties of dehydroascorbate reductase family proteins from Populus tomentosa. Mol Biol Rep 2013; 40:5105-14. [DOI: 10.1007/s11033-013-2612-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 04/30/2013] [Indexed: 10/26/2022]
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Yang HL, Zhao YR, Wang CL, Yang ZL, Zeng QY, Lu H. Molecular characterization of a dehydroascorbate reductase from Pinus bungeana. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2009; 51:993-1001. [PMID: 19903221 DOI: 10.1111/j.1744-7909.2009.00848.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Abstract Dehydroascorbate reductase (DHAR) plays a critical role in the ascorbate-glutathione recycling reaction for most higher plants. To date, studies on DHAR in higher plants have focused largely on Arabidopsis and agricultural plants, and there is virtually no information on the molecular characteristics of DHAR in gymnosperms. The present study reports the cloning and characteristics of a DHAR (PbDHAR) from a pine, Pinus bungeana Zucc. ex Endl. The PbDHAR gene encodes a protein of 215 amino acid residues with a calculated molecular mass of 24.26 kDa. The predicted 3-D structure of PbDHAR showed a typical glutathione S-transferase fold. Reverse transcription-polymerase chain reaction revealed that the PbDHAR was a constitutive expression gene in P. bungeana. The expression level of PbDHAR mRNA in P. bungeana seedlings did not show significant change under high temperature stress. The recombinant PbDHAR was overexpressed in Escherichia coli following purification with affinity chromatography. The recombinant PbDHAR exhibited enzymatic activity (19.84 micromol/min per mg) and high affinity (a K(m) of 0.08 mM) towards the substrates dehydroascorbate (DHA). Moreover, the recombinant PbDHAR was a thermostable enzyme, and retained 77% of its initial activity at 55 degrees C. The present study is the first to provide a detailed molecular characterization of the DHAR in P. bungeana.
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MESH Headings
- Amino Acid Sequence
- Base Sequence
- Cloning, Molecular
- DNA, Complementary/genetics
- Dehydroascorbic Acid/metabolism
- Electrophoresis, Polyacrylamide Gel
- Enzyme Stability
- Gene Expression Profiling
- Gene Expression Regulation, Plant
- Genes, Plant/genetics
- Glutathione/metabolism
- Kinetics
- Models, Molecular
- Molecular Sequence Data
- Oxidoreductases/chemistry
- Oxidoreductases/genetics
- Oxidoreductases/metabolism
- Pinus/enzymology
- Pinus/genetics
- Protein Structure, Secondary
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Recombinant Proteins/isolation & purification
- Recombinant Proteins/metabolism
- Sequence Alignment
- Sequence Analysis, DNA
- Structural Homology, Protein
- Substrate Specificity
- Temperature
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Affiliation(s)
- Hai-Ling Yang
- College of Life Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
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Jiang YC, Huang CY, Wen L, Lin CT. Dehydroascorbate reductase cDNA from sweet potato (Ipomoea batatas [L.] Lam): expression, enzyme properties, and kinetic studies. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:3623-3627. [PMID: 18444663 DOI: 10.1021/jf073511e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A cDNA encoding a putative dehydroascorbate reductase (DHAR) was cloned from sweet potato. The deduced protein showed a high level of sequence homology with DHARs from other plants (67 to approximately 81%). Functional sweet potato DHAR was overexpressed and purified. The purified enzyme showed an active monomeric form on a 12% native PAGE. The protein's half-life of deactivation at 50 degrees C was 10.1 min, and its thermal inactivation rate constant K(d) was 6.4 x 10(-2) min(-1). The enzyme was stable in a broad pH range from 6.0-11.0 and in the presence of 0.8 M imidazole. The K(m) values for DHA and GSH were 0.19 and 2.38 mM, respectively.
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Affiliation(s)
- Yu-Chi Jiang
- Institute of Bioscience and Biotechnology and Center for Marine Bioscience and Biotechnology, National Taiwan Ocean University, Keelung 202, Taiwan
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