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Taxonomic group: fungi /
Organ / tissue: cell wall

The structure was elucidated in this paper
NCBI PubMed ID: 30234296
Publication DOI: 10.1021/acsnano.8b06560
Journal NLM ID: 101313589
Publisher: American Chemical Society
Correspondence: Tang SQ <tshunqt

jnu.edu.cn>; Wang YF <twang-yf

163.com>
Institutions: Guangzhou Jinan Biomedicine Research and Development Center, Institute of Biomedicine, College of Life Science and Technology, Jinan University, Guangzhou, China, Biomedical Engineering Institute, Jinan University, Guangzhou, China, Key Laboratory of Biomedical Materials and Implants, Research Institute of Tsinghua University in Shenzhen, Shenzhen, China

The development of self-assembly strategies for well-studied biopolymers is an important route to complex and functional nanostructures. Here, we report the self-assembly of a stiff polysaccharide, formylated yeast β-glucan, into multiple highly ordered nanostructures from 1D to 3D. This polysaccharide could fold into a two-component helix that consisted of a rod-like helical core and flexible coronas. Annealing in formic acid can trigger the cross-linking of the coronas, resulting in the packing of helices into rod-like, sheet-like, or tube-like supramolecular nanostructures. The specific morphology of the resultant assemblies can be controlled by different annealing conditions such as annealing speed or polymer concentrations. Owing to the presence of reductant formyl groups, these β-glucan nanostructures can reduce silver ions in situ, leading to the guided assembly of ultrathin silver nanowires, silver-polymer nanorods, and silver-polymer necklaces.

helix, glucan, Self-assembly, nanotube, nanowires, silver

Structure type: structural motif or average structure ; 19000
Location inside paper: fig. 1, SSFG
Contained glycoepitopes: IEDB_1397514,IEDB_141806,IEDB_142488,IEDB_144998,IEDB_146664,IEDB_153543,IEDB_158538,IEDB_158555,IEDB_161166,IEDB_558869,IEDB_857743,IEDB_983931,SB_192

Methods: 13C NMR, 1H NMR, CD, dialysis, precipitation, complex formation with Congo Red, TEM, filtration, UV-vis, extration, formolysis
Synthetic data: chemical
Comments, role: degree of polymerization (DP) = ~98; the degree of branching (DB) was estimated by NMR to be 34 % and the degree of substitution (DS) was estimated by the back-titration method to be 1.9
3D data: forms rod-like assemblies or rectangular lattices at low concentrations, nanotubes at high concentrations

Related record ID(s): 49041
NCBI Taxonomy refs (TaxIDs): 4751
Reference(s) to other database(s): GTC:G25366KR
Show glycosyltransferases

There is only one chemically distinct structure:

[*]O[C@H]1[C@H](OC=O)[C@@H](COC=O)O[C@@H](O[C@@H]2[C@@H](OC=O)[C@H](O[C@@H]3[C@@H](OC=O)[C@H]([*])O[C@H](COC=O)[C@H]3OC=O)O[C@H](CO[C@H]3O[C@H](CO[C@H]4O[C@H](CO[C@H]5O[C@H](CO[C@H]6O[C@H](CO[C@@H]7O[C@H](COC=O)[C@@H](OC=O)[C@H](O)[C@H]7OC=O)[C@@H](OC=O)[C@H](O)[C@H]6OC=O)[C@@H](OC=O)[C@H](O)[C@H]5OC=O)[C@@H](OC=O)[C@H](O)[C@H]4OC=O)[C@@H](OC=O)[C@H](O)[C@H]3OC=O)[C@H]2OC=O)[C@@H]1OC=O

SVG MW SMILES 3D mol Ionize

Warning = sub-repeat ending at aDGlcp: unknown unit count was assumed to be 3

jnu.edu.cn>; Wang YF <twang-yf

helix, glucan, Self-assembly, nanotube, nanowires, silver

Structure type: structural motif or average structure ; 19000
Location inside paper: fig. 1, SSG
Contained glycoepitopes: IEDB_1397514,IEDB_141806,IEDB_142488,IEDB_144998,IEDB_146664,IEDB_153543,IEDB_158538,IEDB_158555,IEDB_161166,IEDB_558869,IEDB_857743,IEDB_983931,SB_192

Methods: 13C NMR, 1H NMR, CD, dialysis, precipitation, complex formation with Congo Red, TEM, filtration, UV-vis, extration, formolysis
3D data: forms microfbrils

Related record ID(s): 49040
NCBI Taxonomy refs (TaxIDs): 4751
Reference(s) to other database(s): GTC:G81141OW
Show glycosyltransferases

There is only one chemically distinct structure:

[*]O[C@H]1[C@H](O)[C@@H](CO)O[C@@H](O[C@@H]2[C@@H](O)[C@H](O[C@@H]3[C@@H](O)[C@H]([*])O[C@H](CO)[C@H]3O)O[C@H](CO[C@H]3O[C@H](CO[C@H]4O[C@H](CO[C@H]5O[C@H](CO[C@H]6O[C@H](CO[C@@H]7O[C@H](CO)[C@@H](O)[C@H](O)[C@H]7O)[C@@H](O)[C@H](O)[C@H]6O)[C@@H](O)[C@H](O)[C@H]5O)[C@@H](O)[C@H](O)[C@H]4O)[C@@H](O)[C@H](O)[C@H]3O)[C@H]2O)[C@@H]1O

SVG MW SMILES 3D mol Ionize

Warning = sub-repeat ending at aDGlcp: unknown unit count was assumed to be 3