Taxonomic group: fungi / Ascomycota
(Phylum: Ascomycota)
The structure was elucidated in this paperPublication DOI: 10.1016/j.carbpol.2005.07.023Journal NLM ID: 8307156Publisher: Elsevier
Correspondence: Olafsdottir ES <elinsol
hi.is>
Institutions: University of Iceland, Faculty of Pharmacy, Reykjavik, Iceland, Carlsberg Laboratory, Valby, Denmark, University of Oslo, Institute of Pharmacy, Department of Pharmacognosy, Oslo, Norway
An alkali-extractable water-soluble polysaccharide, Pc-4, was isolated from the lichen Peltigera canina using ethanol fractionation and size exclusion chromatography. The average molecular weight of Pc-4 was estimated to be 53 kDa. Structural characterisation of Pc-4 was performed by methanolysis, methylation analysis and NMR-spectroscopy (1D proton, COSY, NOESY, TOCSY and HSQC). According to data obtained, Pc-4 is a highly branched galactomannan, with (1→6)-linked α-mannopyranosyl units in the main chain, which are mainly disubstituted at O2 and O4 by single unsubstituted units of α-Manp and β-Galp, respectively. Pc-4 resembles the lichen galactomannans described previously; however, Pc-4 has higher degree of branching.
methylation analysis, Galactomannan, NMR-spectroscopy, lichens, Peltigera canina
Structure type: fragment of a bigger structure
Location inside paper: abstract, p. 57, Fig. 1, Pc-4 (E')
Trivial name: galactomannan Pc-4
Compound class: cell wall polysaccharide
Contained glycoepitopes: IEDB_130701,IEDB_140116,IEDB_141793,IEDB_141828,IEDB_144983,IEDB_152206,IEDB_153220,IEDB_153762,IEDB_153763,IEDB_76933,IEDB_983930,SB_198,SB_44,SB_67,SB_72
Methods: 13C NMR, 1H NMR, methylation, NMR-2D, GC-MS, sugar analysis, acid hydrolysis, GC, extraction, reduction with NaBD4, HPGPC
Comments, role: the total of the two fragments (IDs 42092 + 42227) of repeating units of the galactomannan is ~15% (see ID 41834,42091,42092,42093).
Related record ID(s): 41834, 42091, 42092, 42093
NCBI Taxonomy refs (TaxIDs): 161979Reference(s) to other database(s): GTC:G55317BB
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There is only one chemically distinct structure:
Found 
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