Taxonomic group: algae / Ochrophyta
(Phylum: Ochrophyta)
NCBI PubMed ID: 4464319Publication DOI: 10.1021/ja00833a038Journal NLM ID: 7503056Publisher: American Chemical Society
Institutions: Division of Biological Sciences, National Research Council of Canada, Ottawa, Canada
The carbon-13 nmr spectra of two cyclodextrins and several linear glucans have been completely assigned. These assignments were made by comparison with the spectra of glucose, some of its specifically O-methylated derivatives, and a number of differently linked glucobioses and glucotrioses. This technique enables the composition, structure, and major sequence of a number of glucans to be determined. Conformational effects are also apparent in some of the spectra. The 1→4, 1→4, and 1→6 linkage sequence of the glucans from T. mesenterica and P. pullulans give, in addition to an anomeric signal for the 1→6 linkage, two separate anomeric signals for each of the 1→4 linkages. This multiplicity, apparent also in other carbon signals of the spectra, is due to the sensitivity of these carbons to the type of linkage on the neighboring glucose units. Some evidence that conformational effects are involved in this multiplicity is provided by a comparison of the spectra of the 1→4-linked cyclodextrins and linear glucans, where appreciable chemical shift differences are apparent for C1 and C4. These effects are influenced by pH modification and are attributed to differences in rotational isomers at the linked carbons.
NMR, oligosaccharide, Bacterial polysaccharide, amylose
Structure type: homopolymer
Location inside paper: Fig.1, β-1,3-glucan
Trivial name: glucan, β-1,3-glucan, curdlan, curdlan-type polysaccharide 13140, paramylon, curdlan, laminarin, β-glucan, curdlan, β-(1,3)-glucan, β-(1,3)-glucan, curdlan, curdlan, β-1,3-glucan, paramylon, reserve polysaccharide, b-glucan, β-1,3-D-glucan, laminaran, botryosphaeran, laminaran type β-D-glucan, latiglucan I, pachymaran, Curdlan, zymosan A, β-glucan, curdlan, laminarin, zymosan, zymosan, glucan particles, zymosan, β-(1-3)-glucan, β-(1,3)-glucan, β-(1,3)glucan, pachymaran, D-glucan (DPn)540, pachyman, laminaran, curdlan, zymosan, zymosan, β-(1,3)-glucan, zymosan A, zymosan, β-1,3-glucan, curdlan, β-1,3-glucan, curdlan, β-1,3-glucan, curdlan, pachyman, β-(1,3)-glucan, curdlan, callose, a water-insoluble β-(1→3)-glucan, fermentum β-polysaccharide, water-insoluble glucan, callose, laminarin, alkali-soluble β-glucan (PeA3), alkali-soluble polysaccharide (PCAP)
Compound class: EPS, O-polysaccharide, cell wall polysaccharide, lipophosphoglycan, glycoprotein, LPG, glucan, cell wall glucan, polysaccharide, glycoside, β-glucan, β-1, 3-glucan
Contained glycoepitopes: IEDB_1397514,IEDB_142488,IEDB_146664,IEDB_153543,IEDB_158555,IEDB_161166,IEDB_558869,IEDB_857743,IEDB_983931,SB_192
Methods: 13C NMR
NCBI Taxonomy refs (TaxIDs): 80365Reference(s) to other database(s): GTC:G51056AN, GlycomeDB:
157, CCSD:
50049, CBank-STR:4225, CA-RN: 51052-65-4, GenDB:FJ3380871.1
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There is only one chemically distinct structure:
Found 
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