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Minor polysaccharidic constituents from the red seaweed Hypnea musciformis. Appearance of a novel branched uronic acid.
Carbohydr Polym. 2017 Feb 10; 157:156-166.CP

Abstract

Two polysaccharide fractions isolated from Hypnea musciformis after room temperature- and hot water extraction, soluble after KCl precipitation of the more abundant carrageenans, were subfractionated by ion-exchange chromatography eluting with increasing concentrations of NaCl. The lowest NaCl concentration (0.2M) eluted agarans. The dl-hybrids (or mixtures) eluted at intermediate concentrations of NaCl. The d/l-galactose ratio and the sulfate proportion increased with the NaCl concentration. Different types of substitution were present, mainly at C-3 with sulfate, Xyl and methylated Gal stubs, as well as low amounts of 3,6-AnGal. A novel constituent, identified as 3-C-carboxy-d-erythrose1 in its β-furanosic form, was found linked to C-6 of β-Gal units. A search carried out in other species like Iridaea undulosa and Kappaphycus alvarezii also revealed the same constituent. Finally, the late-eluting fractions were mostly carrageenans, with a structure consistent with that of a κ/ι/ν-carrageenan hybrid.

Authors+Show Affiliations

Departamento de Química Orgánica-CIHIDECAR/CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.Departamento de Química Orgánica-CIHIDECAR/CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.Departamento de Química Orgánica-CIHIDECAR/CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina. Electronic address: stortz@qo.fcen.uba.ar.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27987869

Citation

Cosenza, Vanina A., et al. "Minor Polysaccharidic Constituents From the Red Seaweed Hypnea Musciformis. Appearance of a Novel Branched Uronic Acid." Carbohydrate Polymers, vol. 157, 2017, pp. 156-166.
Cosenza VA, Navarro DA, Stortz CA. Minor polysaccharidic constituents from the red seaweed Hypnea musciformis. Appearance of a novel branched uronic acid. Carbohydr Polym. 2017;157:156-166.
Cosenza, V. A., Navarro, D. A., & Stortz, C. A. (2017). Minor polysaccharidic constituents from the red seaweed Hypnea musciformis. Appearance of a novel branched uronic acid. Carbohydrate Polymers, 157, 156-166. https://doi.org/10.1016/j.carbpol.2016.09.071
Cosenza VA, Navarro DA, Stortz CA. Minor Polysaccharidic Constituents From the Red Seaweed Hypnea Musciformis. Appearance of a Novel Branched Uronic Acid. Carbohydr Polym. 2017 Feb 10;157:156-166. PubMed PMID: 27987869.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Minor polysaccharidic constituents from the red seaweed Hypnea musciformis. Appearance of a novel branched uronic acid. AU - Cosenza,Vanina A, AU - Navarro,Diego A, AU - Stortz,Carlos A, Y1 - 2016/09/23/ PY - 2016/08/23/received PY - 2016/09/22/revised PY - 2016/09/22/accepted PY - 2016/12/19/entrez PY - 2016/12/19/pubmed PY - 2018/6/16/medline KW - 3-C-carboxy-d-erythrofuranose KW - Agarans KW - Apiuronic acid KW - Carrageenans KW - Hypnea musciformis SP - 156 EP - 166 JF - Carbohydrate polymers JO - Carbohydr Polym VL - 157 N2 - Two polysaccharide fractions isolated from Hypnea musciformis after room temperature- and hot water extraction, soluble after KCl precipitation of the more abundant carrageenans, were subfractionated by ion-exchange chromatography eluting with increasing concentrations of NaCl. The lowest NaCl concentration (0.2M) eluted agarans. The dl-hybrids (or mixtures) eluted at intermediate concentrations of NaCl. The d/l-galactose ratio and the sulfate proportion increased with the NaCl concentration. Different types of substitution were present, mainly at C-3 with sulfate, Xyl and methylated Gal stubs, as well as low amounts of 3,6-AnGal. A novel constituent, identified as 3-C-carboxy-d-erythrose1 in its β-furanosic form, was found linked to C-6 of β-Gal units. A search carried out in other species like Iridaea undulosa and Kappaphycus alvarezii also revealed the same constituent. Finally, the late-eluting fractions were mostly carrageenans, with a structure consistent with that of a κ/ι/ν-carrageenan hybrid. SN - 1879-1344 UR - https://www.unboundmedicine.com/medline/citation/27987869/Minor_polysaccharidic_constituents_from_the_red_seaweed_Hypnea_musciformis__Appearance_of_a_novel_branched_uronic_acid_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0144-8617(16)31127-4 DB - PRIME DP - Unbound Medicine ER -
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