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Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis.
Carbohydr Polym. 2014 Jan 30; 101:705-13.CP

Abstract

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.

Authors+Show Affiliations

Escuela de Bioanálisis, Facultad de Medicina, Universidad Central de Venezuela, Av. Carlos Raúl Villanueva, Ciudad Universitaria, Los Chaguaramos, 1051 Caracas, Venezuela.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24299829

Citation

Canelón, Dilsia J., et al. "Structure of Highly Substituted Agarans From the Red Seaweeds Laurencia Obtusa and Laurencia Filiformis." Carbohydrate Polymers, vol. 101, 2014, pp. 705-13.
Canelón DJ, Ciancia M, Suárez AI, et al. Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis. Carbohydr Polym. 2014;101:705-13.
Canelón, D. J., Ciancia, M., Suárez, A. I., Compagnone, R. S., & Matulewicz, M. C. (2014). Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis. Carbohydrate Polymers, 101, 705-13. https://doi.org/10.1016/j.carbpol.2013.09.089
Canelón DJ, et al. Structure of Highly Substituted Agarans From the Red Seaweeds Laurencia Obtusa and Laurencia Filiformis. Carbohydr Polym. 2014 Jan 30;101:705-13. PubMed PMID: 24299829.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis. AU - Canelón,Dilsia J, AU - Ciancia,Marina, AU - Suárez,Alírica I, AU - Compagnone,Reinaldo S, AU - Matulewicz,María C, Y1 - 2013/10/04/ PY - 2013/07/06/received PY - 2013/09/24/revised PY - 2013/09/24/accepted PY - 2013/12/5/entrez PY - 2013/12/5/pubmed PY - 2014/8/20/medline KW - Agaran KW - Galactan structure KW - Laurencia KW - Red seaweed polysaccharide KW - Sulfated polysaccharide SP - 705 EP - 13 JF - Carbohydrate polymers JO - Carbohydr Polym VL - 101 N2 - 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. SN - 1879-1344 UR - https://www.unboundmedicine.com/medline/citation/24299829/Structure_of_highly_substituted_agarans_from_the_red_seaweeds_Laurencia_obtusa_and_Laurencia_filiformis_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0144-8617(13)00990-9 DB - PRIME DP - Unbound Medicine ER -