Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis

The water extracts from red seaweeds Laurencia obtusa and Laurencia filiformis comprise complex sulfated agarans. Those from L. obtusa have 3-linked β-d-galactose units in part sulfated on 2-position or methylated on 6-position, while the 4-linked units are mostly 3,6-anhydro-α-l-galactose and α-l-g...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ciancia, Marina, Matulewicz, María Cristina
Publicado:	2014
Materias:	Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Galactans Red seaweeds Sulfated polysaccharides Polysaccharides Xylose Seaweed Laurencia filiformis Laurencia obtusa agaran galactan polysaccharide sulfate sulfate article chemistry isomerism species difference Isomerism Species Specificity Sulfates
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v101_n1_p705_Canelon http://hdl.handle.net/20.500.12110/paper_01448617_v101_n1_p705_Canelon
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01448617_v101_n1_p705_Canelon
record_format	dspace
spelling	paper:paper_01448617_v101_n1_p705_Canelon2023-06-08T15:11:58Z Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis Ciancia, Marina Matulewicz, María Cristina Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Agaran Galactans Laurencia Red seaweeds Sulfated polysaccharides Polysaccharides Xylose Seaweed Laurencia Laurencia filiformis Laurencia obtusa agaran galactan polysaccharide sulfate sulfate article chemistry Galactan structure isomerism Laurencia Red seaweed polysaccharide species difference Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Galactans Isomerism Laurencia Species Specificity Sulfates The water extracts from red seaweeds Laurencia obtusa and Laurencia filiformis comprise complex sulfated agarans. Those from L. obtusa have 3-linked β-d-galactose units in part sulfated on 2-position or methylated on 6-position, while the 4-linked units are mostly 3,6-anhydro-α-l-galactose and α-l-galactose 6-sulfate, some of the latter units are substituted with β-d-xylose on 3-position, precluding alkaline cyclization. The 3-linked β-d-galactose units of the agarans from L. filiformis are mostly sulfated on 2-position, but approximately half of these residues also carry the 4,6-O-(1-carboxyethylidene) group. The 4-linked 3,6-anhydro-α-l-galactose units are methylated or substituted in part with single stubs of β-d-xylose on 2-position. This is the first time that substitution with xylose of 3,6-anhydro-α-l-galactose is reported. Besides, α-l-galactose 2-sulfate carrying single stubs of β-d-xylose on 3-position was also detected. These galactans have some common structural characteristics with those of other species of this genus, but also others that are specific for these species. © 2013 Elsevier Ltd. Fil:Ciancia, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Matulewicz, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v101_n1_p705_Canelon http://hdl.handle.net/20.500.12110/paper_01448617_v101_n1_p705_Canelon
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Agaran Galactans Laurencia Red seaweeds Sulfated polysaccharides Polysaccharides Xylose Seaweed Laurencia Laurencia filiformis Laurencia obtusa agaran galactan polysaccharide sulfate sulfate article chemistry Galactan structure isomerism Laurencia Red seaweed polysaccharide species difference Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Galactans Isomerism Laurencia Species Specificity Sulfates
spellingShingle	Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Agaran Galactans Laurencia Red seaweeds Sulfated polysaccharides Polysaccharides Xylose Seaweed Laurencia Laurencia filiformis Laurencia obtusa agaran galactan polysaccharide sulfate sulfate article chemistry Galactan structure isomerism Laurencia Red seaweed polysaccharide species difference Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Galactans Isomerism Laurencia Species Specificity Sulfates Ciancia, Marina Matulewicz, María Cristina Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis
topic_facet	Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Agaran Galactans Laurencia Red seaweeds Sulfated polysaccharides Polysaccharides Xylose Seaweed Laurencia Laurencia filiformis Laurencia obtusa agaran galactan polysaccharide sulfate sulfate article chemistry Galactan structure isomerism Laurencia Red seaweed polysaccharide species difference Agaran Galactan structure Laurencia Red seaweed polysaccharide Sulfated polysaccharide Galactans Isomerism Laurencia Species Specificity Sulfates
description	The water extracts from red seaweeds Laurencia obtusa and Laurencia filiformis comprise complex sulfated agarans. Those from L. obtusa have 3-linked β-d-galactose units in part sulfated on 2-position or methylated on 6-position, while the 4-linked units are mostly 3,6-anhydro-α-l-galactose and α-l-galactose 6-sulfate, some of the latter units are substituted with β-d-xylose on 3-position, precluding alkaline cyclization. The 3-linked β-d-galactose units of the agarans from L. filiformis are mostly sulfated on 2-position, but approximately half of these residues also carry the 4,6-O-(1-carboxyethylidene) group. The 4-linked 3,6-anhydro-α-l-galactose units are methylated or substituted in part with single stubs of β-d-xylose on 2-position. This is the first time that substitution with xylose of 3,6-anhydro-α-l-galactose is reported. Besides, α-l-galactose 2-sulfate carrying single stubs of β-d-xylose on 3-position was also detected. These galactans have some common structural characteristics with those of other species of this genus, but also others that are specific for these species. © 2013 Elsevier Ltd.
author	Ciancia, Marina Matulewicz, María Cristina
author_facet	Ciancia, Marina Matulewicz, María Cristina
author_sort	Ciancia, Marina
title	Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis
title_short	Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis
title_full	Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis
title_fullStr	Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis
title_full_unstemmed	Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis
title_sort	structure of highly substituted agarans from the red seaweeds laurencia obtusa and laurencia filiformis
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v101_n1_p705_Canelon http://hdl.handle.net/20.500.12110/paper_01448617_v101_n1_p705_Canelon
work_keys_str_mv	AT cianciamarina structureofhighlysubstitutedagaransfromtheredseaweedslaurenciaobtusaandlaurenciafiliformis AT matulewiczmariacristina structureofhighlysubstitutedagaransfromtheredseaweedslaurenciaobtusaandlaurenciafiliformis
_version_	1768546014969462784

Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis

Ejemplares similares