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Kaczmarska A, Pieczywek PM, Cybulska J, Cieśla J, Zdunek A. Structural and rheological properties of diluted alkali soluble pectin from apple and carrot. Food Chem 2024; 446:138869. [PMID: 38428075 DOI: 10.1016/j.foodchem.2024.138869] [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: 06/16/2023] [Revised: 02/13/2024] [Accepted: 02/25/2024] [Indexed: 03/03/2024]
Abstract
Pectin, a complex polysaccharide found in plant cell walls, plays a crucial role in various industries due to its functional properties. The diluted alkali-soluble pectin (DASP) fractions that result from the stepwise extraction of apples and carrots were studied to evaluate their structural and rheological properties. Homogalacturonan and rhamnogalacturonan I, in different proportions, were the main pectin domains that composed DASP from both materials. Atomic force microscopy revealed that the molecules of apple DASP were longer and more branched. A persistence length greater than 40 nm indicated that the pectin molecules deposited on mica behaved as stiff molecules. The weight-averaged molar mass was similar for both samples. Intrinsic viscosity values of 194.91 mL·g-1 and 186.79 mL·g-1 were obtained for apple and carrot DASP, respectively. Rheological measurements showed greater structural strength for apple-extracted pectin, whereas carrot pectin was characterized by a higher linear viscoelasticity limit. This comparison showed that the pectin fractions extracted by diluted alkali are structurally different and have different rheological properties depending on their botanical origin. The acquired insights can enhance the customized use of pectin residue and support further investigations in industries relying on pectin applications.
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Affiliation(s)
- Adrianna Kaczmarska
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-270 Lublin, Poland
| | - Piotr M Pieczywek
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-270 Lublin, Poland
| | - Justyna Cybulska
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-270 Lublin, Poland
| | - Jolanta Cieśla
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-270 Lublin, Poland
| | - Artur Zdunek
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-270 Lublin, Poland.
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Jian C, Sorensen N, Lutter R, Albers R, de Vos W, Salonen A, Mercenier A. The impact of daily supplementation with rhamnogalacturonan-I on the gut microbiota in healthy adults: A randomized controlled trial. Biomed Pharmacother 2024; 174:116561. [PMID: 38593705 DOI: 10.1016/j.biopha.2024.116561] [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: 01/08/2024] [Revised: 03/23/2024] [Accepted: 04/04/2024] [Indexed: 04/11/2024] Open
Abstract
Pectin and its derivatives have been shown to modulate immune signaling as well as gut microbiota in preclinical studies, which may constitute the mechanisms by which supplementation of specific pectic polysaccharides confers protection against viral respiratory infections. In a double-blind, placebo-controlled rhinovirus (RV16) challenge study, healthy volunteers were randomized to consume placebo (0.0 g/day) (N = 46), low-dose (0.3 g/day) (N = 49) or high-dose (1.5 g/day) (N = 51) of carrot derived rhamnogalacturonan-I (cRG-I) for eight weeks and they were subsequently challenged with RV-16. Here, the effect of 8-week cRG-I supplementation on the gut microbiota was studied. While the overall gut microbiota composition in the population was generally unaltered by this very low dose of fibre, the relative abundance of Bifidobacterium spp. (mainly B. adolescentis and B. longum) was significantly increased by both doses of cRG-1. Moreover, daily supplementation of cRG-I led to a dose-dependent reduction in inter- and intra-individual microbiota heterogeneity, suggesting a stabilizing effect on the gut microbiota. The severity of respiratory symptoms did not directly correlate with the cRG-I-induced microbial changes, but several dominant groups of the Ruminococcaceae family and microbiota richness were positively associated with a reduced and hence desired post-infection response. Thus, the present results on the modulation of the gut microbiota composition support the previously demonstrated immunomodulatory and protective effect of cRG-I during a common cold infection.
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Affiliation(s)
- Ching Jian
- Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Finland.
| | | | - René Lutter
- Amsterdam UMC, Department of Experimental Immunology, University of Amsterdam and Amsterdam Infection & Immunity Institute, the Netherlands
| | | | - Willem de Vos
- Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Finland
| | - Anne Salonen
- Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Finland.
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Ohashi T, Mabira Y, Mitsuyoshi Y, Kajiura H, Misaki R, Ishimizu T, Fujiyama K. Expression of an endo-rhamnogalacturonase from Aspergillus aculeatus enhances release of Arabidopsis transparent mucilage. J Biosci Bioeng 2024:S1389-1723(24)00107-5. [PMID: 38643032 DOI: 10.1016/j.jbiosc.2024.03.006] [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: 06/02/2023] [Revised: 03/24/2024] [Accepted: 03/24/2024] [Indexed: 04/22/2024]
Abstract
Mucilage is a gelatinous and sticky hydrophilic polysaccharide released from epidermal cells of seed coat after the hydration of mature seeds and is composed primarily of unbranched rhamnogalacturonan I (RG-I). In this study, we produced a recombinant endo-RG-I hydrolase from Aspergillus aculeatus (AaRhgA) in the fission yeast Schizosaccharomyces pombe and examined its substrate preference for pyridylaminated (PA) RG-I with the various degrees of polymerization (DP). Recombinant AaRhgA requires PA-RG-I with a DP of 10 or higher for its hydrolase activity. We heterologously expressed the AarhgA gene under the strong constitutive promoter, cauliflower mosaic virus 35S promoter, in Arabidopsis thaliana. In a series of biochemical analyses of each mucilage fraction released from the water-imbibed seeds of the transgenic plants, we found the enhanced deposition of the transparent mucilage layer that existed in the peripheral regions of the adherent mucilage and was not stained with ruthenium red. This study demonstrated the feasibility of manipulating the mucilage organization by heterologous expression of the endo-RG-I hydrolase.
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Affiliation(s)
- Takao Ohashi
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan; Department of Life Science, Faculty of Science and Engineering, Setsunan University, Neyagawa, Osaka 572-8508, Japan.
| | - Yurika Mabira
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yutaro Mitsuyoshi
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroyuki Kajiura
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan
| | - Ryo Misaki
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan
| | - Takeshi Ishimizu
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Kazuhito Fujiyama
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan
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Hou K, Fu X, Chen H, Niu H. Characterization and emulsifying ability evaluation of whey protein-pectin conjugates formed by glycosylation. Carbohydr Polym 2024; 329:121790. [PMID: 38286557 DOI: 10.1016/j.carbpol.2024.121790] [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: 10/12/2023] [Revised: 12/22/2023] [Accepted: 01/04/2024] [Indexed: 01/31/2024]
Abstract
Glycosylation is a method that enhances the functional properties of proteins by covalently attaching sugars to them. This study aimed at preparing three conjugates (WP-HG, WP-SBP, and WP-RGI) by dry heating method to research the influence of different pectin structures on the functional properties of WP and characterize properties and structures of these conjugates. The research results manifested that the degree of glycosylation (DG) of HG, SBP and RGI were 13.13 % ± 0.07 %, 23.27 % ± 0.3 % and 36.39 % ± 0.3 % respectively, suggesting that the increase of the number of branch chains promoted the glycosylation reaction. The formation of the conjugate was identified by the FT-IR spectroscopy technique. And SEM showed that WP could covalently bind to pectin, resulting in a smoother and denser surface of the conjugates. The circular dichroism analysis exhibited that the glycosylation reaction altered the secondary structure of WP and decreased the α-Helix content. This structural change in the protein spatial conformation led to a decrease in the hydrophobicity of protein surface. But the addition of pectin further regulated the hydrophilic-hydrophobic ratio on the surface of the protein, thus improving the emulsification properties of WP. In addition, the glycosylation could improve the stability of the emulsion, giving it a smaller droplet size, higher Zeta-potential and more stable properties. In a word, this study pointed out the direction for the application of different pectin structures in the development of functional properties of glycosylation products in food ingredients.
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Affiliation(s)
- Keke Hou
- Hainan University-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 People Road, Haikou 570228, PR China
| | - Xiong Fu
- SCUT-Zhuhai Institute of Modern Industrial Innovation, School of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510640, PR China; Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou, PR China
| | - Haiming Chen
- Hainan University-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 People Road, Haikou 570228, PR China.
| | - Hui Niu
- SCUT-Zhuhai Institute of Modern Industrial Innovation, School of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China.
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Zheng Y, Si Y, Xu X, Gu H, He Z, Zhao Z, Feng Z, Su J, Mayo KH, Zhou Y, Tai G. Ginseng-derived type I rhamnogalacturonan polysaccharide binds to galectin-8 and antagonizes its function. J Ginseng Res 2024; 48:202-210. [PMID: 38465210 PMCID: PMC10920006 DOI: 10.1016/j.jgr.2023.11.007] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 03/12/2024] Open
Abstract
Background Panax ginseng Meyer polysaccharides exhibit various biological functions, like antagonizing galectin-3-mediated cell adhesion and migration. Galectin-8 (Gal-8), with its linker-joined N- and C-terminal carbohydrate recognition domains (CRDs), is also crucial to these biological processes, and thus plays a role in various pathological disorders. Yet the effect of ginseng-derived polysaccharides in modulating Gal-8 function has remained unclear. Methods P. ginseng-derived pectin was chromatographically isolated and enzymatically digested to obtain a series of polysaccharides. Biolayer Interferometry (BLI) quantified their binding affinity to Gal-8, and their inhibitory effects on Gal-8 was assessed by hemagglutination, cell migration and T-cell apoptosis. Results Our ginseng-derived pectin polysaccharides consist mostly of rhamnogalacturonan-I (RG-I) and homogalacturonan (HG). BLI shows that Gal-8 binding rests primarily in RG-I and its β-1,4-galactan side chains, with sub-micromolar KD values. Both N- and C-terminal Gal-8 CRDs bind RG-I, with binding correlated with Gal-8-mediated function. Conclusion P. ginseng RG-I pectin β-1,4-galactan side chains are crucial to binding Gal-8 and antagonizing its function. This study enhances our understanding of galectin-sugar interactions, information that may be used in the development of pharmaceutical agents targeting Gal-8.
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Affiliation(s)
- Yi Zheng
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Yunlong Si
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Xuejiao Xu
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Hongming Gu
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Zhen He
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Zihan Zhao
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Zhangkai Feng
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Jiyong Su
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Kevin H. Mayo
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Yifa Zhou
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
| | - Guihua Tai
- Engineering Research Center of Glycoconjugates Ministry of Education, Jilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun, China
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Ric-Varas P, Paniagua C, López-Casado G, Molina-Hidalgo FJ, Schückel J, Knox JP, Blanco-Portales R, Moyano E, Muñoz-Blanco J, Posé S, Matas AJ, Mercado JA. Suppressing the rhamnogalacturonan lyase gene FaRGLyase1 preserves RGI pectin degradation and enhances strawberry fruit firmness. Plant Physiol Biochem 2024; 206:108294. [PMID: 38159547 DOI: 10.1016/j.plaphy.2023.108294] [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] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/01/2023] [Accepted: 12/18/2023] [Indexed: 01/03/2024]
Abstract
Plant rhamnogalacturonan lyases (RGLyases) cleave the backbone of rhamnogalacturonan I (RGI), the "hairy" pectin and polymer of the disaccharide rhamnose (Rha)-galacturonic acid (GalA) with arabinan, galactan or arabinogalactan side chains. It has been suggested that RGLyases could participate in remodeling cell walls during fruit softening, but clear evidence has not been reported. To investigate the role of RGLyases in strawberry softening, a genome-wide analysis of RGLyase genes in the genus Fragaria was performed. Seventeen genes encoding RGLyases with functional domains were identified in Fragaria × ananassa. FaRGLyase1 was the most expressed in the ripe receptacle of cv. Chandler. Transgenic strawberry plants expressing an RNAi sequence of FaRGLyase1 were obtained. Three transgenic lines yielded ripe fruits firmer than controls without other fruit quality parameters being significantly affected. The highest increase in firmness achieved was close to 32%. Cell walls were isolated from ripe fruits of two selected lines. The amount of water-soluble and chelated pectins was higher in transgenic lines than in the control. A carbohydrate microarray study showed a higher abundance of RGI epitopes in pectin fractions and in the cellulose-enriched fraction obtained from transgenic lines. Sixty-seven genes were differentially expressed in transgenic ripe fruits when compared with controls. These genes were involved in various physiological processes, including cell wall remodeling, ion homeostasis, lipid metabolism, protein degradation, stress response, and defense. The transcriptomic changes observed in FaRGLyase1 plants suggest that senescence was delayed in transgenic fruits.
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Affiliation(s)
- Pablo Ric-Varas
- Instituto de Hortofruticultura Subtropical y Mediterránea 'La Mayora' (IHSM-UMA-CSIC), Departamento de Botánica y Fisiología Vegetal, Universidad de Málaga, 29071, Málaga, Spain
| | - Candelas Paniagua
- Instituto de Hortofruticultura Subtropical y Mediterránea 'La Mayora' (IHSM-UMA-CSIC), Departamento de Botánica y Fisiología Vegetal, Universidad de Málaga, 29071, Málaga, Spain
| | - Gloria López-Casado
- Instituto de Hortofruticultura Subtropical y Mediterránea 'La Mayora' (IHSM-UMA-CSIC), Departamento de Botánica y Fisiología Vegetal, Universidad de Málaga, 29071, Málaga, Spain
| | | | - Julia Schückel
- Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - J Paul Knox
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Rosario Blanco-Portales
- Departamento de Bioquímica y Biología Molecular, Universidad de Córdoba, 14071, Córdoba, Spain
| | - Enriqueta Moyano
- Departamento de Bioquímica y Biología Molecular, Universidad de Córdoba, 14071, Córdoba, Spain
| | - Juan Muñoz-Blanco
- Departamento de Bioquímica y Biología Molecular, Universidad de Córdoba, 14071, Córdoba, Spain
| | - Sara Posé
- Instituto de Hortofruticultura Subtropical y Mediterránea 'La Mayora' (IHSM-UMA-CSIC), Departamento de Botánica y Fisiología Vegetal, Universidad de Málaga, 29071, Málaga, Spain
| | - Antonio J Matas
- Instituto de Hortofruticultura Subtropical y Mediterránea 'La Mayora' (IHSM-UMA-CSIC), Departamento de Botánica y Fisiología Vegetal, Universidad de Málaga, 29071, Málaga, Spain
| | - José A Mercado
- Instituto de Hortofruticultura Subtropical y Mediterránea 'La Mayora' (IHSM-UMA-CSIC), Departamento de Botánica y Fisiología Vegetal, Universidad de Málaga, 29071, Málaga, Spain.
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Qi T, Ren J, Li X, An Q, Zhang N, Jia X, Pan S, Fan G, Zhang Z, Wu K. Structural characteristics and gel properties of pectin from citrus physiological premature fruit drop. Carbohydr Polym 2023; 309:120682. [PMID: 36906363 DOI: 10.1016/j.carbpol.2023.120682] [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: 10/20/2022] [Revised: 02/05/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023]
Abstract
This study is the first to extract and characterize pectin from citrus physiological premature fruit drop. The extraction yield of pectin reached 4.4 % by acid hydrolysis method. The degree of methoxy-esterification (DM) of citrus physiological premature fruit drop pectin (CPDP) was 15.27 %, indicating it was low-methoxylated pectin (LMP). The monosaccharide composition and molar mass test results showed CPDP was a highly branched macromolecular polysaccharide (β: 0.02, Mw: 2.006 × 105 g/mol) with rich rhamnogalacturonan I domain (50.40 %) and long arabinose and galactose side chain (32.02 %). Based on the fact that CPDP is LMP, Ca2+ was used to induce CPDP to form gels. Textural and rheological tests showed that the gel strength and storage modulus of CPDP were higher than commercial citrus pectin (CP) used in this paper due to the lower DM and rich neutral sugar side chains of CPDP. Scanning electron microscope (SEM) results showed CPDP had stable gel network structure.
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Affiliation(s)
- Tingting Qi
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingnan Ren
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiao Li
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qi An
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Nawei Zhang
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiao Jia
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Siyi Pan
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Gang Fan
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Zhifeng Zhang
- Ningxia Huaxinda Health Technology Co., Ltd., Lingwu 751400, China
| | - Kangning Wu
- Ningxia Huaxinda Health Technology Co., Ltd., Lingwu 751400, China
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Kaczmarska A, Pieczywek PM, Cybulska J, Zdunek A. Structure and functionality of Rhamnogalacturonan I in the cell wall and in solution: A review. Carbohydr Polym 2022; 278:118909. [PMID: 34973730 DOI: 10.1016/j.carbpol.2021.118909] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [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: 08/10/2021] [Revised: 11/13/2021] [Accepted: 11/13/2021] [Indexed: 11/02/2022]
Abstract
Rhamnogalacturonan I (RG-I) belongs to the pectin family and is found in many plant cell wall types at different growth stages. It plays a significant role in cell wall and plant biomechanics and shows a gelling ability in solution. However, it has a significantly more complicated structure than smooth homogalacturonan (HG) and its variability due to plant source and physiological state contributes to the fact that RG-I's structure and function is still not so well known. Since functionality is a product of structure, we present a comprehensive review concerning the chemical structure and conformation of RG-I, its functions in plants and properties in solutions.
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Affiliation(s)
- Adrianna Kaczmarska
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
| | - Piotr M Pieczywek
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
| | - Justyna Cybulska
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
| | - Artur Zdunek
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland.
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Lee SJ, In G, Lee JW, Shin KS. Elucidation of the microstructure of an immuno-stimulatory polysaccharide purified from Korean red ginseng using sequential hydrolysis. Int J Biol Macromol 2021; 186:13-22. [PMID: 34242646 DOI: 10.1016/j.ijbiomac.2021.06.202] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/17/2021] [Accepted: 06/29/2021] [Indexed: 10/20/2022]
Abstract
The elucidation of the structural characteristics of polysaccharides from natural sources is generally difficult owing to their structural complexity and heterogeneity. In our previous study, an immuno-stimulatory polysaccharide (RGP-AP-I) was isolated from Korean red ginseng (Panax ginseng C.A. Meyer). The present study aims to elucidate the structural characteristics of RGP-AP-I. Sequential enzyme hydrolysis was performed using four specific glycosylases, and chemical cleavage via β-elimination was carried out to determine the fine structure of RGP-AP-I. The degraded fragments were chemically identified using various chromatographic and spectrometric analyses, including HPLC-UVD, GC-MS, and tandem mass spectrometry. The results indicated that RGP-AP-I comprises a rhamnogalacturonan I (RG-I) backbone with repeating disaccharide units [→2)-Rhap-(1 → 4)-GalAp-(1→] and three side chains substituted at the C(O)4 position of the rhamnose residue in the backbone. The three side chains were identified as a highly branched α-(1 → 5)-arabinan, a branched β-(1 → 4)-galactan, and an arabino-β-3,6-galactan. Our results represent the first findings regarding the fine structure of the immuno-stimulatory polysaccharide RG-AP-I isolated from red ginseng.
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Affiliation(s)
- Sue Jung Lee
- Department of Food Science and Biotechnology, Kyonggi University, 154-42, Gwanggyosan-ro, Youngtong-gu, Suwon, Gyeonggi 16227, Republic of Korea; Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung 25451, Republic of Korea
| | - Gyo In
- Korea Ginseng Research Institute, Korea Ginseng Corporation, Daejeon 34128, Republic of Korea
| | - Jong-Won Lee
- Korea Ginseng Research Institute, Korea Ginseng Corporation, Daejeon 34128, Republic of Korea
| | - Kwang-Soon Shin
- Department of Food Science and Biotechnology, Kyonggi University, 154-42, Gwanggyosan-ro, Youngtong-gu, Suwon, Gyeonggi 16227, Republic of Korea.
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Tang W, Liu D, Wang JQ, Huang XJ, Yin JY, Geng F, Nie SP. Isolation and structure characterization of a low methyl-esterified pectin from the tuber of Dioscorea opposita Thunb. Food Chem 2021; 359:129899. [PMID: 33965763 DOI: 10.1016/j.foodchem.2021.129899] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [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: 12/01/2020] [Revised: 03/21/2021] [Accepted: 04/11/2021] [Indexed: 01/27/2023]
Abstract
A low methyl-esterified pectin (33.2% methyl-esterification degree) was isolated from the tuber of Dioscorea opposita Thunb., which was an edible and medicinal material in China. This pectin (Mw of 1.3 × 104 g/mol) contained the ~59.1% homogalacturonan (HG) and ~38.1% highly branched rhamnogalacturonan I (RG-I) region with possible side chains embracing arabinogalactan II, arabinan or arabinogalactan I. The fragments including HG backbone consisting of → 4)-α-GalpA-(1 → and → 4)-α-GalpA-6-O-methyl-(1 → with molar ratio of ~2:1, and repeating unit of arabinogalactan II side chain composed of α-Araf-(1 → and → 3,6)-β-Galp-(1→, were speculated through methylation analysis and NMR spectra. However, the linkage pattern for RG-I backbone and side chains were indiscernible due to limited resolution of NMR spectra. Besides, the pectin adopted a flexible chain conformation in 0.1 M NaNO3 solution. These results provided a structural basis for study on polysaccharide from D. opposite, which was benefit for development of functional food of yam.
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Affiliation(s)
- Wei Tang
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology Nanchang, Nanchang University, Nanchang, Jiangxi Province 330047, China
| | - Dan Liu
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology Nanchang, Nanchang University, Nanchang, Jiangxi Province 330047, China
| | - Jun-Qiao Wang
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology Nanchang, Nanchang University, Nanchang, Jiangxi Province 330047, China
| | - Xiao-Jun Huang
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology Nanchang, Nanchang University, Nanchang, Jiangxi Province 330047, China
| | - Jun-Yi Yin
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology Nanchang, Nanchang University, Nanchang, Jiangxi Province 330047, China
| | - Fang Geng
- Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Shao-Ping Nie
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology Nanchang, Nanchang University, Nanchang, Jiangxi Province 330047, China.
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11
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Hou Z, Chen S, Ye X. High pressure processing accelarated the release of RG-I pectic polysaccharides from citrus peel. Carbohydr Polym 2021; 263:118005. [PMID: 33858565 DOI: 10.1016/j.carbpol.2021.118005] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 01/14/2021] [Revised: 03/25/2021] [Accepted: 03/25/2021] [Indexed: 11/15/2022]
Abstract
High pressure processing (HPP) has become a promising strategy for extracting bioactive constituents. In this study, the impact of HPP treatment at various pH values (2.0, 8.0, and 12.0) on the macromolecular, structural, antioxidant capacity, rheological characteristics and gel properties of citrus pectic polysaccharide was investigated. The results showed that pressure and pH significantly affected the yield and Rhamnogalacturonan I (RG-I) characterizations. The yields of high pressure extraction at pH 12 (28.13 %-33.95 %) were significantly higher than the yields at pH 2 (14.85 %-16.11 %) and pH 8 (8.75 %-9.65 %). The yield of HPP (500 MPa/10 min) assisted alkali extraction is more than 2 times of that of HPP assisted acid extraction. The RG-I structure ratio of HPP-alkali extraction pectic polysaccharide (74.51 %) was significantly higher than that of traditional pectin (41.83 %). The results showed that HPP assisted alkali is a potential pectic polysaccharide extraction technology.
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Affiliation(s)
- Zhiqiang Hou
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Engineering Laboratory of Food Technology and Equipment, Zhejiang University, Hangzhou, 310058, China
| | - Shiguo Chen
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Engineering Laboratory of Food Technology and Equipment, Zhejiang University, Hangzhou, 310058, China; Fuli Institute of Food Science, Zhejiang University, Hangzhou, 310058, China; Ningbo Research Institute, Zhejiang University, Hangzhou, 315100, China.
| | - Xingqian Ye
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Engineering Laboratory of Food Technology and Equipment, Zhejiang University, Hangzhou, 310058, China; Fuli Institute of Food Science, Zhejiang University, Hangzhou, 310058, China; Ningbo Research Institute, Zhejiang University, Hangzhou, 315100, China
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12
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Jiang N, Dillon FM, Silva A, Gomez-Cano L, Grotewold E. Rhamnose in plants - from biosynthesis to diverse functions. Plant Sci 2021; 302:110687. [PMID: 33288005 DOI: 10.1016/j.plantsci.2020.110687] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 06/26/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 05/27/2023]
Abstract
In plants, the deoxy sugar l-rhamnose is widely present as rhamnose-containing polymers in cell walls and as part of the decoration of various specialized metabolites. Here, we review the current knowledge on the distribution of rhamnose, highlighting the differences between what is known in dicotyledoneuos compared to commelinid monocotyledoneous (grasses) plants. We discuss the biosynthesis and transport of UDP-rhamnose, as well as the transfer of rhamnose from UDP-rhamnose to various primary and specialized metabolites. This is carried out by rhamnosyltransferases, enzymes that can use a large variety of substrates. Some unique characteristics of rhamnose synthases, the multifunctional enzymes responsible for the conversion of UDP-glucose into UDP-rhamnose, are considered, particularly from the perspective of their ability to convert glucose present in flavonoids. Finally, we discuss how little is still known with regards to how plants rescue rhamnose from the many compounds to which it is linked, or how rhamnose is catabolized.
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Affiliation(s)
- Nan Jiang
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA
| | - Francisco M Dillon
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA
| | - Alexander Silva
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA
| | - Lina Gomez-Cano
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA
| | - Erich Grotewold
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA.
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13
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Matsumoto N, Takenaka Y, Wachananawat B, Kajiura H, Imai T, Ishimizu T. Rhamnogalacturonan I galactosyltransferase: Detection of enzyme activity and its hyperactivation. Plant Physiol Biochem 2019; 142:173-178. [PMID: 31299599 DOI: 10.1016/j.plaphy.2019.07.008] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 07/03/2019] [Accepted: 07/03/2019] [Indexed: 06/10/2023]
Abstract
Rhamnogalacturonan I (RG-I), one of the pectic components of the plant cell wall, is composed of a backbone of repeating disaccharide units of rhamnose and galacturonic acid, and side chains, such as galactans, arabinans, and arabinogalactans. The activity of RG-I galactosyltransferase, which transfers galactosyl residues to rhamnosyl residues in the RG-I backbone, has not been detected until now. Here, we detected galactosyltransferase activity in azuki bean epicotyls using fluorogenic RG-I oligosaccharide acceptors. This enzyme prefers oligosaccharides with a degree of polymerization more than 9. The enzyme activity was detected in the Golgi apparatus, which is the site of pectin synthesis. In vitro hyperactivation of this enzyme was also observed. Moreover, enzyme activity was increased up to 40-fold in the presence of cationic surfactants or polyelectrolytes.
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Affiliation(s)
- Naoki Matsumoto
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Yuto Takenaka
- Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | | | - Hiroyuki Kajiura
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Tomoya Imai
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, 611-0011, Japan
| | - Takeshi Ishimizu
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan; Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan.
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14
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Dhillon A, Sharma K, Rajulapati V, Goyal A. The multi-ligand binding first family 35 Carbohydrate Binding Module (CBM35) of Clostridium thermocellum targets rhamnogalacturonan I. Arch Biochem Biophys 2018; 654:194-208. [PMID: 30080990 DOI: 10.1016/j.abb.2018.07.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 04/27/2018] [Revised: 07/25/2018] [Accepted: 07/27/2018] [Indexed: 11/24/2022]
Abstract
Carbohydrate Binding Modules (CBMs) targeting cellulose, xylan and mannan have been reported, however, a CBM targeting rhamnogalacturonan I (RG I) has never been identified. We had studied earlier a rhamnogalacturonan lyase (CtRGL) from Clostridium thermocellum that was associated with a family 35 CBM, Rgl-CBM35. In this study we show that Rgl-CBM35 displays binding with β-d-glucuronic acid (β-D-GlcpA), Δ4,5-anhydro-d-galactopyranosyluronic acid (Δ4,5-GalpA), rhamnogalacturonan I, arabinan, galactan, glucuronoxylans and arabinoxylans. Rgl-CBM35 contains a conserved ligand binding site in the loops known for binding β-D-GlcpA and Δ4,5-GalpA moiety of unsaturated RG I and pectic-oligosaccharides. Mutagenesis revealed that Asn118 plays an important role in binding β-D-GlcpA, Δ4,5-GalpA, sugarbeet arabinan and potato galactan at its conserved ligand binding site present in surface exposed loops. EDTA-treated Rgl-CBM35 showed no affinity towards β-D-GlcpA and Δ4,5-GalpA underscoring Ca2+ mediated ligand recognition. Contrastingly, the EDTA-treated Rgl-CBM35 and its mutant N118A displayed affinity for sugarbeet arabinan and potato galactan. The curtailed affinity of Y37A/N118A and R69A/N118A double mutants towards sugarbeet arabinan emphasized the presence of a second ligand binding site. Rgl-CBM35 is the first CBM reported to primarily target RG I and also is the first member of family 35 CBM possessing at least two ligand binding sites.
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Affiliation(s)
- Arun Dhillon
- Carbohydrate Enzyme Biotechnology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Kedar Sharma
- Carbohydrate Enzyme Biotechnology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Vikky Rajulapati
- Carbohydrate Enzyme Biotechnology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Arun Goyal
- Carbohydrate Enzyme Biotechnology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
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15
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Uehara Y, Tamura S, Maki Y, Yagyu K, Mizoguchi T, Tamiaki H, Imai T, Ishii T, Ohashi T, Fujiyama K, Ishimizu T. Biochemical characterization of rhamnosyltransferase involved in biosynthesis of pectic rhamnogalacturonan I in plant cell wall. Biochem Biophys Res Commun 2017; 486:130-136. [PMID: 28283389 DOI: 10.1016/j.bbrc.2017.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 02/26/2017] [Accepted: 03/06/2017] [Indexed: 11/30/2022]
Abstract
The pectin in plant cell walls consists of three domains: homogalacturonan, rhamnogalacturonan (RG)-I, and RG-II. It is predicted that around 50 different glycosyltransferases are required for their biosynthesis. Among these, the activities of only a few glycosyltransferases have been detected because pectic oligosaccharides are not readily available for use as substrates. In this study, fluorogenic pyridylaminated RG-I-backbone oligosaccharides (PA-RGs) with 3-14 degrees of polymerization (DP) were prepared. Using these oligosaccharides, the activity of RG-I:rhamnosyltransferase (RRT), involved in the biosynthesis of the RG-I backbone diglycosyl repeating units (-4GalUAα1-2Rhaα1-), was detected from the microsomes of azuki bean epicotyls. RRT was found to prefer longer acceptor substrates, PA-RGs with a DP > 7, and it does not require any metal ions for its activity. RRT is located in the Golgi and endoplasmic reticulum. The activity of RRT coincided with epicotyl growth, suggesting that RG-I biosynthesis is involved in plant growth.
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Affiliation(s)
- Yohei Uehara
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Shunsuke Tamura
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Yusuke Maki
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan; Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Kenta Yagyu
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Tadashi Mizoguchi
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Hitoshi Tamiaki
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Tomoya Imai
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Tadashi Ishii
- Graduate School of Life and Environmental Sciences, Tsukuba University, Tsukuba, Ibaraki 305-8572, Japan
| | - Takao Ohashi
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kazuhito Fujiyama
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan
| | - Takeshi Ishimizu
- College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.
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16
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Gorshkov O, Mokshina N, Gorshkov V, Chemikosova S, Gogolev Y, Gorshkova T. Transcriptome portrait of cellulose-enriched flax fibres at advanced stage of specialization. Plant Mol Biol 2017; 93:431-449. [PMID: 27981388 DOI: 10.1007/s11103-016-0571-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 05/20/2016] [Accepted: 12/02/2016] [Indexed: 05/13/2023]
Abstract
Functional specialization of cells is among the most fundamental processes of higher organism ontogenesis. The major obstacle to studying this phenomenon in plants is the difficulty of isolating certain types of cells at defined stages of in planta development for in-depth analysis. A rare opportunity is given by the developed model system of flax (Linum usitatissimum L.) phloem fibres that can be purified from the surrounding tissues at the stage of the tertiary cell wall deposition. The performed comparison of the whole transcriptome profile in isolated fibres and other portions of the flax stem, together with fibre metabolism characterization, helped to elucidate the general picture of the advanced stage of plant cell specialization and to reveal novel participants potentially involved in fibre metabolism regulation and cell wall formation. Down-regulation of all genes encoding proteins involved in xylan and lignin synthesis and up-regulation of genes for the specific set of transcription factors transcribed during tertiary cell wall formation were revealed. The increased abundance of transcripts for several glycosyltransferases indicated the enzymes that may be involved in synthesis of fibre-specific version of rhamnogalacturonan I.
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Affiliation(s)
- Oleg Gorshkov
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Centre, Russian Academy of Science, Lobachevsky str., 2/31, Kazan, 420111, Russia
| | - Natalia Mokshina
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Centre, Russian Academy of Science, Lobachevsky str., 2/31, Kazan, 420111, Russia
| | - Vladimir Gorshkov
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Centre, Russian Academy of Science, Lobachevsky str., 2/31, Kazan, 420111, Russia
| | - Svetlana Chemikosova
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Centre, Russian Academy of Science, Lobachevsky str., 2/31, Kazan, 420111, Russia
| | - Yuri Gogolev
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Centre, Russian Academy of Science, Lobachevsky str., 2/31, Kazan, 420111, Russia
| | - Tatyana Gorshkova
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Centre, Russian Academy of Science, Lobachevsky str., 2/31, Kazan, 420111, Russia.
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17
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Buffetto F, Cornuault V, Rydahl MG, Ropartz D, Alvarado C, Echasserieau V, Le Gall S, Bouchet B, Tranquet O, Verhertbruggen Y, Willats WGT, Knox JP, Ralet MC, Guillon F. The Deconstruction of Pectic Rhamnogalacturonan I Unmasks the Occurrence of a Novel Arabinogalactan Oligosaccharide Epitope. Plant Cell Physiol 2015; 56:2181-96. [PMID: 26384432 DOI: 10.1093/pcp/pcv128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 06/22/2015] [Accepted: 09/02/2015] [Indexed: 05/18/2023]
Abstract
Rhamnogalacturonan I (RGI) is a pectic polysaccharide composed of a backbone of alternating rhamnose and galacturonic acid residues with side chains containing galactose and/or arabinose residues. The structure of these side chains and the degree of substitution of rhamnose residues are extremely variable and depend on species, organs, cell types and developmental stages. Deciphering RGI function requires extending the current set of monoclonal antibodies (mAbs) directed to this polymer. Here, we describe the generation of a new mAb that recognizes a heterogeneous subdomain of RGI. The mAb, INRA-AGI-1, was produced by immunization of mice with RGI oligosaccharides isolated from potato tubers. These oligomers consisted of highly branched RGI backbones substituted with short side chains. INRA-AGI-1 bound specifically to RGI isolated from galactan-rich cell walls and displayed no binding to other pectic domains. In order to identify its RGI-related epitope, potato RGI oligosaccharides were fractionated by anion-exchange chromatography. Antibody recognition was assessed for each chromatographic fraction. INRA-AGI-1 recognizes a linear chain of (1→4)-linked galactose and (1→5)-linked arabinose residues. By combining the use of INRA-AGI-1 with LM5, LM6 and INRA-RU1 mAbs and enzymatic pre-treatments, evidence is presented of spatial differences in RGI motif distribution within individual cell walls of potato tubers and carrot roots. These observations raise questions about the biosynthesis and assembly of pectin structural domains and their integration and remodeling in cell walls.
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Affiliation(s)
- Fanny Buffetto
- INRA, UR1268 Biopolymères Interactions Assemblages, 44300 Nantes, France Present address: Institute for Wine Biotechnology, Department of Viticulture and Oenology, Faculty of AgriSciences, Stellenbosch University, Matieland 7602, South Africa
| | - Valérie Cornuault
- Centre for Plant Sciences, Faculty of Biological Sciences University of Leeds, Leeds LS2 9JT, UK
| | - Maja Gro Rydahl
- Department of Plant and Environmental Sciences, University of Copenhagen, 1871 Frederiksberg, Denmark
| | - David Ropartz
- INRA, UR1268 Biopolymères Interactions Assemblages, 44300 Nantes, France
| | - Camille Alvarado
- INRA, UR1268 Biopolymères Interactions Assemblages, 44300 Nantes, France
| | | | - Sophie Le Gall
- INRA, UR1268 Biopolymères Interactions Assemblages, 44300 Nantes, France
| | - Brigitte Bouchet
- INRA, UR1268 Biopolymères Interactions Assemblages, 44300 Nantes, France
| | - Olivier Tranquet
- INRA, UR1268 Biopolymères Interactions Assemblages, 44300 Nantes, France
| | | | - William G T Willats
- Department of Plant and Environmental Sciences, University of Copenhagen, 1871 Frederiksberg, Denmark
| | - J Paul Knox
- Centre for Plant Sciences, Faculty of Biological Sciences University of Leeds, Leeds LS2 9JT, UK
| | | | - Fabienne Guillon
- INRA, UR1268 Biopolymères Interactions Assemblages, 44300 Nantes, France
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18
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Leijdekkers AGM, Huang JH, Bakx EJ, Gruppen H, Schols HA. Identification of novel isomeric pectic oligosaccharides using hydrophilic interaction chromatography coupled to traveling-wave ion mobility mass spectrometry. Carbohydr Res 2014; 404:1-8. [PMID: 25647688 DOI: 10.1016/j.carres.2014.12.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [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: 10/17/2014] [Revised: 11/23/2014] [Accepted: 12/13/2014] [Indexed: 11/29/2022]
Abstract
Separation and characterization of complex mixtures of pectic oligosaccharides still remains challenging and often requires the use of multiple analytical techniques, especially when isomeric structures are present. In this work, it is demonstrated that the coupling of hydrophilic interaction chromatography (HILIC) to traveling-wave ion mobility mass spectrometry (TWIMMS) enabled the simultaneous separation and characterization of complex mixtures of various isomeric pectic oligosaccharides. Labeling of oligosaccharides with 3-aminoquinoline (3-AQ) improved MS-ionization efficiency of the oligosaccharides and reduced the complexity of the product ion mass spectra, without losing resolution of the HILIC separation. In addition, labeling enabled quantification of oligosaccharides on molar basis using in-line fluorescence detection. Isomeric structures were distinguished using TWIMMS. The 3-AQ-HILIC-TWIMMS method was used to characterize a series of isomeric sugar beet rhamnogalacturonan I derived oligosaccharides carrying a glucuronic acid substituent. Thereby, some novel structural features were identified for the first time: glucuronic acid was attached to O-3 or to O-2 of galacturonic acid residues and a single galacturonic acid residue within an oligomer could contain both an acetyl group and a glucuronic acid substituent.
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Affiliation(s)
- Antonius G M Leijdekkers
- Wageningen University, Laboratory of Food Chemistry, PO Box 17, 6700 AA Wageningen, The Netherlands; IRS, PO Box 32, 4600 AA Bergen op Zoom, The Netherlands
| | - Jie-Hong Huang
- Wageningen University, Laboratory of Food Chemistry, PO Box 17, 6700 AA Wageningen, The Netherlands
| | - Edwin J Bakx
- Wageningen University, Laboratory of Food Chemistry, PO Box 17, 6700 AA Wageningen, The Netherlands
| | - Harry Gruppen
- Wageningen University, Laboratory of Food Chemistry, PO Box 17, 6700 AA Wageningen, The Netherlands
| | - Henk A Schols
- Wageningen University, Laboratory of Food Chemistry, PO Box 17, 6700 AA Wageningen, The Netherlands.
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19
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Gao X, Zhi Y, Sun L, Peng X, Zhang T, Xue H, Tai G, Zhou Y. The inhibitory effects of a rhamnogalacturonan I (RG-I) domain from ginseng pectin on galectin-3 and its structure-activity relationship. J Biol Chem 2013; 288:33953-33965. [PMID: 24100038 DOI: 10.1074/jbc.m113.482315] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Pectin has been shown to inhibit the actions of galectin-3, a β-galactoside-binding protein associated with cancer progression. The structural features of pectin involved in this activity remain unclear. We investigated the effects of different ginseng pectins on galectin-3 action. The rhamnogalacturonan I-rich pectin fragment, RG-I-4, potently inhibited galectin-3-mediated hemagglutination, cancer cell adhesion and homotypic aggregation, and binding of galectin-3 to T-cells. RG-I-4 specifically bound to the carbohydrate recognition domain of galectin-3 with a dissociation constant of 22.2 nm, which was determined by surface plasmon resonance analysis. The structure-activity relationship of RG-I-4 was investigated by modifying the structure through various enzymatic and chemical methods followed by activity tests. The results showed that (a) galactan side chains were essential to the activity of RG-I-4, whereas arabinan side chains positively or negatively regulated the activity depending on their location within the RG-I-4 molecule. (b) The activity of galactan chain was proportional to its length up to 4 Gal residues and largely unchanged thereafter. (c) The majority of galactan side chains in RG-I-4 were short with low activities. (d) The high activity of RG-I-4 resulted from the cooperative action of these side chains. (e) The backbone of the molecule was very important to RG-I-4 activity, possibly by maintaining a structural conformation of the whole molecule. (f) The isolated backbone could bind galectin-3, which was insensitive to lactose treatment. The novel discovery that the side chains and backbone play distinct roles in regulating RG-I-4 activity is valuable for producing highly active pectin-based galectin-3 inhibitors.
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Affiliation(s)
- Xiaoge Gao
- School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Yuan Zhi
- School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Lin Sun
- School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Xiaoxia Peng
- School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Tao Zhang
- School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Huiting Xue
- School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Guihua Tai
- School of Life Sciences, Northeast Normal University, Changchun 130024, China.
| | - Yifa Zhou
- School of Life Sciences, Northeast Normal University, Changchun 130024, China.
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