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Song J, Liu Y, Yin X, Nan Y, Shi Y, Chen X, Liang H, Zhang J, Ma B. Isolation and structural elucidation of prebiotic oligosaccharides from Ziziphi Spinosae Semen. Carbohydr Res 2023; 534:108948. [PMID: 37783055 DOI: 10.1016/j.carres.2023.108948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/21/2023] [Accepted: 09/19/2023] [Indexed: 10/04/2023]
Abstract
Six oligosaccharides were discovered and isolated for the first time from Ziziphi Spinosae Semen. On the basis of spectroscopic analysis, their structures were determined to be verbascose (1), verbascotetraose (2), stachyose (3), manninotriose (4), raffinose (5), and melibiose (6). The prebiotic effect of the oligosaccharide fraction was assayed by eight gut bacterial growth in vitro, revealing a significant increase in cell density, up to 4-fold, for Lactobacillus acidophilus, Lactobacillus gasseri, and Lactobacillus johnsonii. The impact of six oligosaccharides with different degrees of polymerization (DPs) and structures on the growth of Lactobacillus acidophilus was evaluated. As a result, stachyose and raffinose demonstrated superior support for bacterial growth compared to the other oligosaccharides. This study explored the structure-activity relationship of raffinose family oligosaccharides (RFOs) and showed that the more the monosaccharide type, the more supportive the gut bacteria growth when oligosaccharides have the same molecular weight.
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Affiliation(s)
- Juan Song
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Yue Liu
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China; School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510060, China
| | - Xiangchang Yin
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Yi Nan
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China; Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China
| | - Yuhao Shi
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China; Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China
| | - Xiaojuan Chen
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Haizhen Liang
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Jie Zhang
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Baiping Ma
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, 100850, China; School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510060, China; Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
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Bai X, Sun X, Yu Y, Guo Y, Nian L, Cao C, Cheng S. Immobilization of α-galactosidase in polyvinyl alcohol-chitosan-glycidyl methacrylate hydrogels based on directional freezing-assisted salting-out strategy for hydrolysis of RFOs. Int J Biol Macromol 2023; 242:124808. [PMID: 37211074 DOI: 10.1016/j.ijbiomac.2023.124808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/28/2023] [Accepted: 05/06/2023] [Indexed: 05/23/2023]
Abstract
Raffinose family oligosaccharides (RFOs) in food are the main factors causing flatulence in Irritable Bowel Syndrome (IBS) patients and the development of effective approaches for reducing food-derived RFOs is of paramount importance. In this study, polyvinyl alcohol (PVA)-chitosan (CS)-glycidyl methacrylate (GMA) immobilized α-galactosidase was prepared by the directional freezing-assisted salting-out technique, aimed to hydrolyze RFOs. SEM, FTIR, XPS, fluorescence and UV characterization results demonstrated that α-galactosidase was successfully cross-linked in the PVA-CS-GMA hydrogels, forming a distinct porous stable network through the covalent bond between the enzyme and the carrier. Mechanical performance and swelling capacity analysis illustrated that α-gal @ PVA-CS-GMA not only had suitable strength and toughness for longer durability, but also exhibited high water content and swelling capacity for better retention of catalytic activity. The enzymatic properties of α-gal @ PVA-CS-GMA showed an improved Km value, pH and temperature tolerance range, anti-enzymatic inhibitor (melibiose) activity compared to the free α-galactosidase and its reusability was at least 12 times with prolonged storage stability. Finally, it was successfully applied in the hydrolysis of RFOs in soybeans. These findings provide a new strategy for the development of α-galactosidase immobilization system to biological transform the RFOs components in the food for diet intervention of IBS.
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Affiliation(s)
- Xixi Bai
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Xiaoyang Sun
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Yue Yu
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Yuheng Guo
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Linyu Nian
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Chongjiang Cao
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Shujie Cheng
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China.
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Kanwal F, Ren D, Kanwal W, Ding M, Su J, Shang X. The potential role of non-digestible Raffinose family oligosaccharides as prebiotics. Glycobiology 2023; 33:274-288. [PMID: 36795047 DOI: 10.1093/glycob/cwad015] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 01/23/2023] [Accepted: 02/04/2023] [Indexed: 02/17/2023] Open
Abstract
Based on factual scientific health claims, prebiotics has gained significant importance in ever-growing food and pharmaceutical industries. The diverse nature of distinct prebiotics influences the host differently in distinguishable patterns. Functional oligosaccharides are either plant-derived or commercially prepared. Raffinose, stachyose, and verbascose are three types of raffinose family oligosaccharides (RFOs) that have been extensively used as medicine, cosmetic, and food additives. These dietary fiber fractions avert the adhesion and colonization by enteric pathogens and add nutrition metabolites for a healthy immune system. Enrichment of RFOs in healthy foods should be promoted as these oligosaccharides augment gut microecology by enhancing the health conferring microbes i.e. Bifidobacteria and Lactobacilli. RFOs influence the host's multiorgan systems due to their physiological and physicochemical properties. For example, the fermented microbial products of such carbohydrates affect neurological processes, including memory, mood, and behavior in humans. Raffinose-type sugar uptake is thought to be a ubiquitous property of Bifidobacteria. This review paper summarizes the source of RFOs and their metabolizing entities highlighting bifidobacterial carbohydrate utilization and health benefits.
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Affiliation(s)
- Freeha Kanwal
- School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
| | - Dingxin Ren
- School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
| | - Wajiha Kanwal
- Microbiology and Molecular Genetics, University of The Punjab, Lahore, Pakistan
| | - Mengying Ding
- School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
| | - Junqing Su
- School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
| | - Xiaoya Shang
- School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
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Kannan U, Sharma R, Gangola MP, Ganeshan S, Båga M, Chibbar RN. Sequential expression of raffinose synthase and stachyose synthase corresponds to successive accumulation of raffinose, stachyose and verbascose in developing seeds of Lens culinaris Medik. J Plant Physiol 2021; 265:153494. [PMID: 34454370 DOI: 10.1016/j.jplph.2021.153494] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/05/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Raffinose, stachyose and verbascose form the three major members of the raffinose family oligosaccharides (RFO) accumulated during seed development. Raffinose synthase (RS; EC 2.4.1.82) and stachyose synthase (STS; EC 2.4.1.67) have been associated with raffinose and stachyose synthesis, but the precise mechanism for verbascose synthesis is not well understood. In this study, full-length RS (2.7 kb) and STS (2.6 kb) clones were isolated by screening a cDNA library prepared from developing lentil seeds (18, 20, 22 and 24 days after flowering [DAF]) to understand the roles of RS and STS in RFO accumulation in developing lentil seeds. The nucleotide sequences of RS and STS genes were similar to those reported for Pisum sativum. Patterns of transcript accumulation, enzyme activities and RFO concentrations were also comparable to P. sativum. However, during lentil seed development raffinose, stachyose and verbascose accumulation corresponded to transcript accumulation for RS and STS, with peak transcript abundance occurring at about 22-24 DAF, generally followed by a sequential increase in raffinose, stachyose and verbascose concentrations followed by a steady level thereafter. Enzyme activities for RS, STS and verbascose synthase (VS) also indicated a sudden increase at around 24-26 DAF, but with an abrupt decline again coinciding with the subsequent steady state increase in the RFO. Galactan:galactan galactosyl transferase (GGT), the galactinol-independent pathway enzyme, however, exhibited steady increase in activity from 24 DAF onwards before abruptly decreasing at 34 DAF. Although GGT activity was detected, isolation of a GGT sequence from the cDNA library was not successful.
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Affiliation(s)
- Udhaya Kannan
- Department of Plant Sciences, College of Agriculture & Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, Saskatchewan, S7N 5A8, Canada
| | - Roopam Sharma
- Department of Plant Sciences, College of Agriculture & Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, Saskatchewan, S7N 5A8, Canada
| | - Manu P Gangola
- Department of Plant Sciences, College of Agriculture & Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, Saskatchewan, S7N 5A8, Canada
| | - Seedhabadee Ganeshan
- Department of Plant Sciences, College of Agriculture & Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, Saskatchewan, S7N 5A8, Canada
| | - Monica Båga
- Department of Plant Sciences, College of Agriculture & Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, Saskatchewan, S7N 5A8, Canada
| | - Ravindra N Chibbar
- Department of Plant Sciences, College of Agriculture & Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, Saskatchewan, S7N 5A8, Canada.
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Wang J, Yang X, Yang Y, Liu Y, Piao X, Cao Y. Characterization of a protease-resistant α-galactosidase from Aspergillus oryzae YZ1 and its application in hydrolysis of raffinose family oligosaccharides from soymilk. Int J Biol Macromol 2020; 158:708-720. [PMID: 32387605 DOI: 10.1016/j.ijbiomac.2020.04.256] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 11/22/2022]
Abstract
The α-galactosidase gene (galC) was cloned from Aspergillus oryzae YZ1 and expressed in Pichia pastoris. The galC (2319 bp) containing two introns encoded a protein of 726 amino acids. The activity of the α-galactosidase (GalC) increased 1-fold after coding sequence optimization. Purified GalC exhibited a single protein band (100 kDa) in SDS-PAGE. The optimum pH and temperature of GalC were pH 4.66 and 50 °C, respectively. Like many GH36 family α-galactosidases, GalC displayed its activities towards raffinose and stachyose. The Km values for pNPG, raffinose and stachyose were 2.16, 4.63 and 8.54 mM, respectively. The GalC retained about 90% activity within the pH range 3.0-8.0. The activity of GalC was inhibited by Cu2+, while Ca2+ increased the enzyme activity. Different concentrations of glucose, mannose, galactose, xylose and sucrose slightly affected the activity of GalC. The GalC displayed strong resistance to trypsin, α-chymotrypsin, and proteinase K. Under simulated gastric conditions, GalC maintained most of its native activity after pepsin treatment for 3 h. The GalC could also effectively degrade raffinose and stachyose in soymilk. The GalC with high hydrolysis efficiency towards raffinose family oligosaccharides (RFOs) and strong resistance to proteases is considered to have great potential in food and feed industries.
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Affiliation(s)
- Jian Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Xu Yang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yongzhi Yang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yajing Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Xiangshu Piao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yunhe Cao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China.
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Wang H, Blakeslee JJ, Jones ML, Chapin LJ, Dami IE. Exogenous abscisic acid enhances physiological, metabolic, and transcriptional cold acclimation responses in greenhouse-grown grapevines. Plant Sci 2020; 293:110437. [PMID: 32081274 DOI: 10.1016/j.plantsci.2020.110437] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 01/26/2020] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
Previous studies have demonstrated that the freezing tolerance (FT) of grapevine was enhanced by foliar application of exogenous abscisic acid (exo-ABA), a treatment which might be incorporated into cultural practices to mitigate cold damage in vineyards. To investigate the underlying mechanisms of this response, a two-year (2017 and 2018) study was conducted to characterize the effects of exo-ABA on greenhouse-grown 'Cabernet franc' grapevine. In control grapevines, both physiological (deeper dormancy) and biochemical (sugar accumulation in buds) changes occurred, indicating that grapevines initiated cold acclimation in the greenhouse. Compared to control, exo-ABA decreased stomatal conductance 2 h after application. Two weeks post application, exo-ABA treated grapevines showed accelerated transition of grapevine physiology during cold acclimation (increased depth of dormancy, decreased bud water content and enhanced bud FT), relative to control. Exo-ABA induced the accumulation of several sugars in buds including the raffinose family oligosaccharides (RFOs), and the RFO precursor, galactinol. The expression of raffinose and galactinol synthase genes was higher in exo-ABA treated grapevine buds, compared to control. The new findings from this study have advanced our understanding of the role of ABA in grapevine FT, which will be useful to develop future strategies to protect grapevines from cold damage.
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Affiliation(s)
- Hongrui Wang
- Department of Horticulture and Crop Science, OARDC/The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Joshua J Blakeslee
- Department of Horticulture and Crop Science, OARDC/The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA; Ohio Agricultural Research and Development Center Metabolite Analysis Cluster, The Ohio State University, Wooster, OH, 44691, USA
| | - Michelle L Jones
- Department of Horticulture and Crop Science, OARDC/The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Laura J Chapin
- Department of Horticulture and Crop Science, OARDC/The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Imed E Dami
- Department of Horticulture and Crop Science, OARDC/The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA.
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Cui LH, Byun MY, Oh HG, Kim SJ, Lee J, Park H, Lee H, Kim WT. Poaceae Type II Galactinol Synthase 2 from Antarctic Flowering Plant Deschampsia antarctica and Rice Improves Cold and Drought Tolerance by Accumulation of Raffinose Family Oligosaccharides in Transgenic Rice Plants. Plant Cell Physiol 2020; 61:88-104. [PMID: 31513272 DOI: 10.1093/pcp/pcz180] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 09/07/2019] [Indexed: 06/10/2023]
Abstract
Deschampsia antarctica is a Poaceae grass that has adapted to and colonized Antarctica. When D. antarctica plants were subjected to cold and dehydration stress both in the Antarctic field and in laboratory experiments, galactinol, a precursor of raffinose family oligosaccharides (RFOs) and raffinose were highly accumulated, which was accompanied by upregulation of galactinol synthase (GolS). The Poaceae monocots have a small family of GolS genes, which are divided into two distinct groups called types I and II. Type II GolSs are highly expanded in cold-adapted monocot plants. Transgenic rice plants, in which type II D. antarctica GolS2 (DaGolS2) and rice GolS2 (OsGolS2) were constitutively expressed, were markedly tolerant to cold and drought stress as compared to the wild-type rice plants. The RFO contents and GolS enzyme activities were higher in the DaGolS2- and OsGolS2-overexpressing progeny than in the wild-type plants under both normal and stress conditions. DaGolS2 and OsGolS2 overexpressors contained reduced levels of reactive oxygen species (ROS) relative to the wild-type plants after cold and drought treatments. Overall, these results suggest that Poaceae type II GolS2s play a conserved role in D. antarctica and rice in response to drought and cold stress by inducing the accumulation of RFO and decreasing ROS levels.
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Affiliation(s)
- Li Hua Cui
- Division of Life Science, Department of Systems Biology, Yonsei University, Seoul 03722, Korea
- Institute of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Mi Young Byun
- Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, Korea
| | - Hyeong Geun Oh
- Division of Life Science, Department of Systems Biology, Yonsei University, Seoul 03722, Korea
- Institute of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Sung Jin Kim
- Division of Life Sciences, Korea Polar Research Institute, Incheon 21990, Korea
| | - Jungeun Lee
- Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, Korea
- Polar Science, University of Science & Technology, Daejeon 34113, Korea
| | - Hyun Park
- Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, Korea
- Polar Science, University of Science & Technology, Daejeon 34113, Korea
| | - Hyoungseok Lee
- Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, Korea
- Polar Science, University of Science & Technology, Daejeon 34113, Korea
| | - Woo Taek Kim
- Division of Life Science, Department of Systems Biology, Yonsei University, Seoul 03722, Korea
- Institute of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
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Álvarez-Cao ME, Cerdán ME, González-Siso MI, Becerra M. Optimization of Saccharomyces cerevisiae α-galactosidase production and application in the degradation of raffinose family oligosaccharides. Microb Cell Fact 2019; 18:172. [PMID: 31601209 PMCID: PMC6786279 DOI: 10.1186/s12934-019-1222-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 09/29/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND α-Galactosidases are enzymes that act on galactosides present in many vegetables, mainly legumes and cereals, have growing importance with respect to our diet. For this reason, the use of their catalytic activity is of great interest in numerous biotechnological applications, especially those in the food industry directed to the degradation of oligosaccharides derived from raffinose. The aim of this work has been to optimize the recombinant production and further characterization of α-galactosidase of Saccharomyces cerevisiae. RESULTS The MEL1 gene coding for the α-galactosidase of S. cerevisiae (ScAGal) was cloned and expressed in the S. cerevisiae strain BJ3505. Different constructions were designed to obtain the degree of purification necessary for enzymatic characterization and to improve the productive process of the enzyme. ScAGal has greater specificity for the synthetic substrate p-nitrophenyl-α-D-galactopyranoside than for natural substrates, followed by the natural glycosides, melibiose, raffinose and stachyose; it only acts on locust bean gum after prior treatment with β-mannosidase. Furthermore, this enzyme strongly resists proteases, and shows remarkable activation in their presence. Hydrolysis of galactose bonds linked to terminal non-reducing mannose residues of synthetic galactomannan-oligosaccharides confirms that ScAGal belongs to the first group of α-galactosidases, according to substrate specificity. Optimization of culture conditions by the statistical model of Response Surface helped to improve the productivity by up to tenfold when the concentration of the carbon source and the aeration of the culture medium was increased, and up to 20 times to extend the cultivation time to 216 h. CONCLUSIONS ScAGal characteristics and improvement in productivity that have been achieved contribute in making ScAGal a good candidate for application in the elimination of raffinose family oligosaccharides found in many products of the food industry.
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Affiliation(s)
- María-Efigenia Álvarez-Cao
- Departamento de Bioloxía, Facultade de Ciencias, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña. Grupo EXPRELA, A Coruña, Spain
| | - María-Esperanza Cerdán
- Departamento de Bioloxía, Facultade de Ciencias, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña. Grupo EXPRELA, A Coruña, Spain
| | - María-Isabel González-Siso
- Departamento de Bioloxía, Facultade de Ciencias, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña. Grupo EXPRELA, A Coruña, Spain
| | - Manuel Becerra
- Departamento de Bioloxía, Facultade de Ciencias, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña. Grupo EXPRELA, A Coruña, Spain
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Zhang Q, Song X, Bartels D. Sugar metabolism in the desiccation tolerant grass Oropetium thomaeum in response to environmental stresses. Plant Sci 2018; 270:30-36. [PMID: 29576083 DOI: 10.1016/j.plantsci.2018.02.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/15/2017] [Accepted: 02/06/2018] [Indexed: 05/28/2023]
Abstract
Oropetium thomaeum is a desiccation tolerant grass and acquisition of desiccation tolerance is correlated with changes in carbohydrate metabolism. Here we address the question whether the changes in carbohydrate metabolism are specific to the dehydration process or whether other environmental factors such as high temperature, low temperature, hypoxia, salinity or exogenous ABA application trigger the same or different changes in the sugar metabolism. Fifteen different sugar metabolites were identified by GC/MS, including erythritol, arabinose, fructose, galactose, glucose, myo-inositol, sedoheptulose, sucrose, trehalose, galactinol, maltose, raffinose, manninotriose and stachyose. Together with starch, these sugars were placed into the pathways of sucrose metabolism and raffinose family oligosaccharides (RFOs) metabolism, as well as into the group of rare sugars. By comparing the changes of sugars under various stresses, we concluded that the changes in the sugar metabolism are both convergent and divergent in response to different stresses. Except for the general response to stress, such as starch degradation, the changes of specific sugar metabolites reflect a stress-specific response of O. thomaeum. Erythritol seems to be specific for dehydration, myo-inositol for salt stress and trehalose for hypoxia stress. Similar as dehydration, low temperature, salt stress and ABA application resulted in the accumulation of sucrose and RFOs in O. thomaeum, which indicates that these stresses share high similarity with dehydration. Thus it is proposed that sucrose and RFOs have a general protective role under these stresses. In contrast sucrose and RFOs did not accumulate in response to high temperature or hypoxia whose effects tend to be consumptive and destructive. The accumulation of galactose, melibiose and manninotriose demonstrate that RFOs are degraded under stress. The accumulation of these sugar metabolites might result from the reaction of RFOs and stress-produced hydroxyl radicals, which supports a possible role of RFOs in stress defense. In addition, ABA application led to substantial synthesis of stachyose which occurs only in response to dehydration, indicating that stachyose synthesis is possibly closely related to ABA in O. thomaeum.
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Affiliation(s)
- Qingwei Zhang
- Institute of Molecular Physiology and Biotechnology of Plants (IMBIO), University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Xiaomin Song
- Institute of Molecular Physiology and Biotechnology of Plants (IMBIO), University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Dorothea Bartels
- Institute of Molecular Physiology and Biotechnology of Plants (IMBIO), University of Bonn, Kirschallee 1, 53115, Bonn, Germany.
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Gu H, Lu M, Zhang Z, Xu J, Cao W, Miao M. Metabolic process of raffinose family oligosaccharides during cold stress and recovery in cucumber leaves. J Plant Physiol 2018; 224-225:112-120. [PMID: 29617631 DOI: 10.1016/j.jplph.2018.03.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 03/22/2018] [Accepted: 03/22/2018] [Indexed: 06/08/2023]
Abstract
Raffinose family oligosaccharides (RFOs) accumulate under stress conditions in many plants and have been suggested to act as stress protectants. To elucidate the metabolic process of RFOs under cold stress, levels of RFOs, and related carbohydrates, the expression and activities of main metabolic enzymes and their subcellular compartments were investigated during low-temperature treatment and during the recovery period in cucumber leaves. Cold stress induced the accumulation of stachyose in vacuoles, galactinol in vacuoles and cytosol, and sucrose and raffinose in vacuoles, cytosol, and chloroplasts. After cold stress removal, levels of these sugars decreased gradually in the respective compartments. Among four galactinol synthase genes (CsGS), CsGS1 was not affected by cold stress, while the other three CsGSs were up-regulated by low temperature. RNA levels of acid-α-galactosidase (GAL) 3 and alkaline-α-galactosidase (AGA) 2 and 3, and the activities of GAL and AGA, were up-regulated after cold stress removal. GAL3 protein and GAL activity were exclusively located in vacuoles, whereas AGA2 and AGA 3 proteins were found in cytosol and chloroplasts, respectively. The results indicate that RFOs, which accumulated during cold stress in different subcellular compartments in cucumber leaves, could be catabolized in situ by different galactosidases after stress removal.
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Affiliation(s)
- Hao Gu
- Yangzhou Key Laboratory of Plant Functional Genomics of Ministry of Education, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Man Lu
- Yangzhou Key Laboratory of Plant Functional Genomics of Ministry of Education, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Zhiping Zhang
- Yangzhou Key Laboratory of Plant Functional Genomics of Ministry of Education, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Jinjin Xu
- Yangzhou Key Laboratory of Plant Functional Genomics of Ministry of Education, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Wenhua Cao
- Yangzhou Key Laboratory of Plant Functional Genomics of Ministry of Education, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Minmin Miao
- Yangzhou Key Laboratory of Plant Functional Genomics of Ministry of Education, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China.
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Chen L, Hu D, Liang X, Zhao J, Li S. Preparation and identification of oligosaccharides in lotus seeds and determination of their distribution in different parts of lotus. Electrophoresis 2018; 39:2020-2028. [PMID: 29572877 DOI: 10.1002/elps.201700490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/07/2018] [Accepted: 03/08/2018] [Indexed: 11/11/2022]
Abstract
Three fractions (I-III) were separated from crude oligosaccharides of lotus seeds by fast protein liquid chromatography with final purity of 97.6, 96.3, and 96.8%, respectively. The fractions were identified as sucrose, raffinose, and stachyose by using TLC, HPLC with charged aerosol detector (CAD), LC-MS, and methylation analysis. Subsequently sucrose and raffinose family oligosaccharides (RFOs) with degree of polymerization (DP) 3-5 (raffinose, stachyose, and verbascose) have been quantified by HPLC-CAD for the first time. All calibration curves for investigated analytes showed good linear regression (R2 > 0.9952). Their limit of detection and limit of quantity were in the ranges 0.14-0.28 and 0.36-0.48 μg/mL, respectively. The recoveries ranged from 96.6 to 103.4%. The contents of sucrose and RFOs DP3-DP5 were different in lotus seeds and other parts of lotus samples, but similar in their own variety. Additionally, the distribution of RFOs in different parts of lotus were also compared and the results indicated that RFOs might be mainly synthesized in lotus seeds. This work is helpful for understanding the way of biosynthesis of RFOs in lotus as well as quality control of plants containing RFOs.
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Affiliation(s)
- Lingxiao Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, P. R. China
| | - Dejun Hu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, P. R. China
| | - Xiao Liang
- Bino Beijing Limited, Beijing, P. R. China
| | - Jing Zhao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, P. R. China
| | - Shaoping Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, P. R. China
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Bertrand A, Bipfubusa M, Claessens A, Rocher S, Castonguay Y. Effect of photoperiod prior to cold acclimation on freezing tolerance and carbohydrate metabolism in alfalfa (Medicago sativa L.). Plant Sci 2017; 264:122-128. [PMID: 28969792 DOI: 10.1016/j.plantsci.2017.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 08/30/2017] [Accepted: 09/01/2017] [Indexed: 05/11/2023]
Abstract
Cold acclimation proceeds sequentially in response to decreases in photoperiod and temperature. This study aimed at assessing the impact of photoperiod prior to cold acclimation on freezing tolerance and related biochemical and molecular responses in two alfalfa cultivars. The fall dormant cultivar Evolution and semi-dormant cultivar 6010 were grown in growth chambers under different photoperiods (8, 10, 12, 14 or 16h) prior to cold acclimation. Freezing tolerance was evaluated as well as carbohydrate concentrations, levels of transcripts encoding enzymes of carbohydrate metabolism as well as a K-3dehydrin, before and after cold acclimation. The fall dormant cultivar Evolution had a better freezing tolerance than the semi-dormant cultivar 6010. The effect of photoperiod prior to cold acclimation on the level of freezing tolerance differed between the two cultivars: an 8h-photoperiod induced the highest level of freezing tolerance in Evolution and the lowest in 6010. In Evolution, the 8h-induced superior freezing tolerance was associated with higher concentration of raffinose-family oligosaccharides (RFO). The transcript levels of sucrose synthase (SuSy) decreased whereas those of sucrose phosphatase synthase (SPS) and galactinol synthase (GaS) increased in response to cold acclimation in both cultivars. Our results indicate that RFO metabolism could be involved in short photoperiod-induced freezing tolerance in dormant alfalfa cultivars.
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Affiliation(s)
- Annick Bertrand
- Quebec Research and Development Centre, Agriculture and Agri-Food Canada, Québec, QC, G1V 2J3, Canada.
| | - Marie Bipfubusa
- Quebec Research and Development Centre, Agriculture and Agri-Food Canada, Québec, QC, G1V 2J3, Canada
| | - Annie Claessens
- Quebec Research and Development Centre, Agriculture and Agri-Food Canada, Québec, QC, G1V 2J3, Canada
| | - Solen Rocher
- Quebec Research and Development Centre, Agriculture and Agri-Food Canada, Québec, QC, G1V 2J3, Canada
| | - Yves Castonguay
- Quebec Research and Development Centre, Agriculture and Agri-Food Canada, Québec, QC, G1V 2J3, Canada
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