1. Structural characterization and anticoagulant analysis of the novel branched fucosylated glycosaminoglycan from sea cucumber Holothuria nobilis.
- Author
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Li, Shanni, Zhong, Wei, Pan, Ying, Lin, Lisha, Cai, Ying, Mao, Hui, Zhang, Taocui, Li, Sujuan, Chen, Ru, Zhou, Lutan, Wang, Weili, Cui, Qinghua, Yin, Ronghua, Huang, Shengxiong, and Zhao, Jinhua
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SEA cucumbers , *CHONDROITIN sulfates , *DISACCHARIDES , *DEGREE of polymerization , *OLIGOSACCHARIDES , *THROMBIN time , *GLYCOSAMINOGLYCANS - Abstract
Glycosaminoglycan HnFG was extracted from sea cucumber Holothuria nobilis. Its chemical structure was characterized by analyzing the physicochemical properties, oligosaccharides from its mild acid hydrolysates and depolymerized products. The disaccharide d -GalNAc 4S6S -α1,2- l -Fuc 3S -ol found in its mild acid hydrolysates provided a clue for the presence of a unique disaccharide-branch in HnFG. Furthermore, it was confirmed by a series of oligosaccharides from the low-molecular weight HnFG prepared by β-eliminative depolymerization. Combining with the analysis of its peroxide depolymerized products, the precise structure of HnFG was determined: A chondroitin sulfate E (CS-E)-like backbone branched with sulfated monofucoses (~67%) and disaccharides d -GalNAc S -α1,2- l -Fuc 3S (~33%) at O-3 position of each GlcUA. This is the first report on the novel branches in glycosaminoglycan. Biologically, the native and depolymerized HnFG showed potent activities in prolonging the activated partial thrombin time (APTT) and inhibiting intrinsic coagulation Xase (iXase), whereas the oligosaccharides (degree of polymerization ≤6) had no obvious effects. • A glycosaminoglycan HnFG were isolated from sea cucumber Holothuria nobilis. • Structures of fifteen oligomers from hydrolysates and depolymerized HnFG were clarified. • HnFG was partially branched with unique disaccharide GalNAc S -α1,2-Fuc 3S. • Anticoagulant and anti-iXase activities of (d)HnFG and oligomers were discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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