{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Bilan MI"],"funding":["Institute of Oceanography, Vietnam Academy of Science and Technology","Russian Science Foundation"],"pagination":["10326"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12609645"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["26(21)"],"pubmed_abstract":["A water-soluble high-molecular neutral polysaccharide (<b>NP</b>) was isolated from the eggs of the sea urchin <i>Tripneustes gratilla</i>. The formation of glucose only upon the treatment of <b>NP</b> by amyloglucosidase and the value of its optical rotation [α]<sub>D</sub> +233.5 (c 0.2, water) confirmed its belonging to the family of α-d-glucans. According to the results of NMR spectroscopy and methylation analysis, the chains of <b>NP</b> are built up of non-reducing terminal, 4-linked and 4,6-disubstituted glucose residues at a ratio of 1:8:1. A branched structure with an average linear chain length of about five glucose residues was calculated from the spectrum of iodine complex. Contrary to the previously published structure of branched α-d-glucan from the sea urchin <i>Strongylocen"],"journal":["International journal of molecular sciences"],"pubmed_title":["Chemical Structure of a Branched α-d-Glucan from the Eggs of Sea Urchin &lt;i&gt;Tripneustes gratilla&lt;/i&gt;."],"pmcid":["PMC12609645"],"funding_grant_id":["KC.09.10/21-30","19-73-30017-P"],"pubmed_authors":["Dmitrenok AS","Usov AI","Bilan MI","Cao HTT","Nifantiev NE","Trung DT","Torgov VI","Argunov DA","Pham TD"],"additional_accession":[]},"is_claimable":false,"name":"Chemical Structure of a Branched α-d-Glucan from the Eggs of Sea Urchin &lt;i&gt;Tripneustes gratilla&lt;/i&gt;.","description":"A water-soluble high-molecular neutral polysaccharide (<b>NP</b>) was isolated from the eggs of the sea urchin <i>Tripneustes gratilla</i>. The formation of glucose only upon the treatment of <b>NP</b> by amyloglucosidase and the value of its optical rotation [α]<sub>D</sub> +233.5 (c 0.2, water) confirmed its belonging to the family of α-d-glucans. According to the results of NMR spectroscopy and methylation analysis, the chains of <b>NP</b> are built up of non-reducing terminal, 4-linked and 4,6-disubstituted glucose residues at a ratio of 1:8:1. A branched structure with an average linear chain length of about five glucose residues was calculated from the spectrum of iodine complex. Contrary to the previously published structure of branched α-d-glucan from the sea urchin <i>Strongylocen","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Oct","modification":"2026-05-18T03:20:02.448Z","creation":"2026-05-18T03:13:06.659Z"},"accession":"S-EPMC12609645","cross_references":{"pubmed":["41226367"],"doi":["10.3390/ijms262110326"]}}