The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta)
The main acidic polysaccharides from the red seaweed Jania rubens share the general characteristics of corallinans (agar-like xylogalactans). After fractionation by ion-exchange chromatography, ten fractions were separated and characterized by sugar composition, other components, methylation, ethyla...
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todo:paper_00086215_v343_n15_p2613_Navarro2023-10-03T14:07:18Z The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta) Navarro, D.A. Stortz, C.A. 3,6-Anhydrogalactose Agaran Corallinales Jania Sulfated galactans Xylogalactans Acids Alkylation Biopolymers Chromatographic analysis Chromatography Computer networks Ion chromatography Ion exchange Methylation Nuclear magnetic resonance Polysaccharides Seaweed Sugar (sucrose) 3,6-Anhydrogalactose Agaran Corallinales Jania Sulfated galactans Xylogalactans Sugars disaccharidase galactan polysaccharide sugar unclassified drug xylogalactan article chemical structure coralline alga extraction fractionation ion exchange chromatography jania rubens methylation nuclear magnetic resonance nuclear magnetic resonance spectroscopy priority journal red alga seaweed solvolysis Algae, Red Carbohydrates Chromatography, Ion Exchange Disaccharides Galactans Magnetic Resonance Spectroscopy Methylation Models, Chemical Molecular Conformation Molecular Structure Polysaccharides Protons Seaweed Xylose Corallinales Jania Jania rubens Rhodophyta The main acidic polysaccharides from the red seaweed Jania rubens share the general characteristics of corallinans (agar-like xylogalactans). After fractionation by ion-exchange chromatography, ten fractions were separated and characterized by sugar composition, other components, methylation, ethylation, desulfation-methylation, and NMR analyses. The main group of fractions carry the agaran disaccharidic repeating unit [→3)-β-d-Gal-(1→4)-α-l-Gal-(1→] substituted mainly on O-6 of the β-d-Gal unit by β-xylosyl side stubs, and less with sulfate or methoxyl groups, and also on O-2 of the α-l-Gal unit with methoxyl or sulfate, or less on O-3 of the same unit with methoxyl groups. These features are somehow common to the four members of the order already studied. However, a sugar uncommon to the order appears in moderate proportions for all the fractions: it is 3,6-anhydro-l-galactose (partly sulfated or methoxylated on O-2) replacing the l-Gal unit. Besides, several other structural features never found in the order (and uncommon in any polysaccharide) appear in some minor fractions: the presence of side stubs of 2,3-di- and 3-O-methyl-d-galactose, and also part of the 3-O-methyl-l-galactose acting as side stubs. These results show that, although the main features of the corallinean xylogalactans are common to all the species studied, each one has minor characteristics of its own. © 2008 Elsevier Ltd. All rights reserved. Fil:Navarro, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Stortz, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00086215_v343_n15_p2613_Navarro |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
3,6-Anhydrogalactose Agaran Corallinales Jania Sulfated galactans Xylogalactans Acids Alkylation Biopolymers Chromatographic analysis Chromatography Computer networks Ion chromatography Ion exchange Methylation Nuclear magnetic resonance Polysaccharides Seaweed Sugar (sucrose) 3,6-Anhydrogalactose Agaran Corallinales Jania Sulfated galactans Xylogalactans Sugars disaccharidase galactan polysaccharide sugar unclassified drug xylogalactan article chemical structure coralline alga extraction fractionation ion exchange chromatography jania rubens methylation nuclear magnetic resonance nuclear magnetic resonance spectroscopy priority journal red alga seaweed solvolysis Algae, Red Carbohydrates Chromatography, Ion Exchange Disaccharides Galactans Magnetic Resonance Spectroscopy Methylation Models, Chemical Molecular Conformation Molecular Structure Polysaccharides Protons Seaweed Xylose Corallinales Jania Jania rubens Rhodophyta |
| spellingShingle |
3,6-Anhydrogalactose Agaran Corallinales Jania Sulfated galactans Xylogalactans Acids Alkylation Biopolymers Chromatographic analysis Chromatography Computer networks Ion chromatography Ion exchange Methylation Nuclear magnetic resonance Polysaccharides Seaweed Sugar (sucrose) 3,6-Anhydrogalactose Agaran Corallinales Jania Sulfated galactans Xylogalactans Sugars disaccharidase galactan polysaccharide sugar unclassified drug xylogalactan article chemical structure coralline alga extraction fractionation ion exchange chromatography jania rubens methylation nuclear magnetic resonance nuclear magnetic resonance spectroscopy priority journal red alga seaweed solvolysis Algae, Red Carbohydrates Chromatography, Ion Exchange Disaccharides Galactans Magnetic Resonance Spectroscopy Methylation Models, Chemical Molecular Conformation Molecular Structure Polysaccharides Protons Seaweed Xylose Corallinales Jania Jania rubens Rhodophyta Navarro, D.A. Stortz, C.A. The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta) |
| topic_facet |
3,6-Anhydrogalactose Agaran Corallinales Jania Sulfated galactans Xylogalactans Acids Alkylation Biopolymers Chromatographic analysis Chromatography Computer networks Ion chromatography Ion exchange Methylation Nuclear magnetic resonance Polysaccharides Seaweed Sugar (sucrose) 3,6-Anhydrogalactose Agaran Corallinales Jania Sulfated galactans Xylogalactans Sugars disaccharidase galactan polysaccharide sugar unclassified drug xylogalactan article chemical structure coralline alga extraction fractionation ion exchange chromatography jania rubens methylation nuclear magnetic resonance nuclear magnetic resonance spectroscopy priority journal red alga seaweed solvolysis Algae, Red Carbohydrates Chromatography, Ion Exchange Disaccharides Galactans Magnetic Resonance Spectroscopy Methylation Models, Chemical Molecular Conformation Molecular Structure Polysaccharides Protons Seaweed Xylose Corallinales Jania Jania rubens Rhodophyta |
| description |
The main acidic polysaccharides from the red seaweed Jania rubens share the general characteristics of corallinans (agar-like xylogalactans). After fractionation by ion-exchange chromatography, ten fractions were separated and characterized by sugar composition, other components, methylation, ethylation, desulfation-methylation, and NMR analyses. The main group of fractions carry the agaran disaccharidic repeating unit [→3)-β-d-Gal-(1→4)-α-l-Gal-(1→] substituted mainly on O-6 of the β-d-Gal unit by β-xylosyl side stubs, and less with sulfate or methoxyl groups, and also on O-2 of the α-l-Gal unit with methoxyl or sulfate, or less on O-3 of the same unit with methoxyl groups. These features are somehow common to the four members of the order already studied. However, a sugar uncommon to the order appears in moderate proportions for all the fractions: it is 3,6-anhydro-l-galactose (partly sulfated or methoxylated on O-2) replacing the l-Gal unit. Besides, several other structural features never found in the order (and uncommon in any polysaccharide) appear in some minor fractions: the presence of side stubs of 2,3-di- and 3-O-methyl-d-galactose, and also part of the 3-O-methyl-l-galactose acting as side stubs. These results show that, although the main features of the corallinean xylogalactans are common to all the species studied, each one has minor characteristics of its own. © 2008 Elsevier Ltd. All rights reserved. |
| format |
JOUR |
| author |
Navarro, D.A. Stortz, C.A. |
| author_facet |
Navarro, D.A. Stortz, C.A. |
| author_sort |
Navarro, D.A. |
| title |
The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta) |
| title_short |
The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta) |
| title_full |
The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta) |
| title_fullStr |
The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta) |
| title_full_unstemmed |
The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta) |
| title_sort |
system of xylogalactans from the red seaweed jania rubens (corallinales, rhodophyta) |
| url |
http://hdl.handle.net/20.500.12110/paper_00086215_v343_n15_p2613_Navarro |
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