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An acidic exopolysaccharide α-D-galacturono-β-D-glucan produced by the cyanobacterium Scytonema sp.
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SYSNO ASEP 0586072 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title An acidic exopolysaccharide α-D-galacturono-β-D-glucan produced by the cyanobacterium Scytonema sp. Author(s) Uhliariková, I. (SK)
Matulová, M. (SK)
Lukavský, Jaromír (BU-J) RID, ORCID
Capek, P. (SK)Number of authors 4 Article number 109088 Source Title Carbohydrate Research. - : Elsevier - ISSN 0008-6215
Roč. 538, APR 2024 (2024)Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords Cyanobacteria ; Scytonema sp. ; Exopolysaccharides Subject RIV EA - Cell Biology OECD category Cell biology R&D Projects TN02000044 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Limited access Institutional support BU-J - RVO:67985939 UT WOS 001216838300001 EID SCOPUS 85188554109 DOI https://doi.org/10.1016/j.carres.2024.109088 Annotation Some cyanobacteria produce a wide range of secondary metabolites, some of which are of industrial interest. Exopolysaccharides, particularly interesting among them, represent relatively complex primary structures with interesting bioactivity, biodegradability and specific applications. Cultivation of the freshwater cyanobacterium Scytonema sp. provided a proteoglycan-type exopolysaccharide with a relatively low yield and a wide spectrum of molecular weights ( M w ) ranging from 2.2 to 1313 x 10 3 g/mol. Chemical analyses detected the presence of carbohydrates (46 wt%), proteins (10 wt%) and uronic acids (8 wt%). Monosaccharide analysis revealed up to seven neutral sugars with a dominance of glucose (23.6 wt%), galactose (7.4 wt%) and fucose (5.0 wt%) residues, while the others had a much lower content (0.93.4 wt%). The presence of galacturonic acid (8.0 wt%) indicated the appearance of ionic type of exopolysaccharide. A preliminary structural study indicated that the alpha-D-galacturono- beta-D-glucan forms a dominant part of Scytonema sp. exopolymer. Its backbone is composed of two 1,6linked and one 1,2-linked beta-D-Glc p residues, which is branched at O6 by side chains composed of alpha-D-GalA p (1> 2)- beta-D-Glc p (1> dimer or monomeric beta-D-Glc p (1> residue. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2025 Electronic address https://doi.org/10.1016/j.carres.2024.109088
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