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Oligosaccharide Assembly

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Protein glycosylation starts in the ER lumen and continues in the Golgi apparatus. Glycosyltransferases catalyze the addition of sugar molecules or glycosylation of proteins. Usually, these enzymes add sugars to the hydroxyl groups of selected serine or threonine residues to form O-linked glycans or the amino groups of asparagine residues to form N-linked glycans. Different positions on the same polypeptide chain can contain differently linked glycans.
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ECM Protein Nanofibers and Nanostructures Engineered Using Surface-initiated Assembly

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Published on: April 17, 2014

Metal-Assisted Carbohydrate Assembly.

Yong Wu^1,2, Chun Tang^1,2, Jauh Tzuoh Lee³

¹Department of Chemistry, The University of Hong Kong, Hong Kong SAR 999077, China.

Journal of the American Chemical Society

|March 29, 2024

Summary

This summary is machine-generated.

Researchers developed a new method for creating complex carbohydrate superstructures using cyclofructan-6 (CF-6) and metal cations. This breakthrough enables the controlled assembly of novel carbohydrate-based materials with tunable nanomechanical properties.

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Area of Science:

Carbohydrate chemistry
Supramolecular chemistry
Materials science

Background:

Sequence-controlled assembly of nucleic acids and amino acids into superstructures is a revolutionary technology.
Carbohydrate superstructures remain largely unexplored due to complexity and flexibility.

Purpose of the Study:

To report the bottom-up assembly of hierarchical superstructures from cyclo-oligosaccharides.
To explore the potential of carbohydrates in creating advanced materials.

Main Methods:

Utilized cyclofructan-6 (CF-6), a flexible cyclo-oligosaccharide.
Employed alkali metal cations to form coordinative bonds with CF-6 oxygen atoms.
Investigated the formation of extended frameworks and their hierarchical superstructures.

Main Results:

Coordinative bonds locked CF-6 conformations into rigid structures.
CF-6 ligands were bridged, leading to multi-level assembly.
Three extended frameworks with hierarchical superstructures were formed.
These superstructures modulated the nanomechanical properties of the materials.

Conclusions:

Demonstrated a novel method for constructing complex carbohydrate superstructures.
Highlighted the potential of carbohydrates in supramolecular assembly.
Encouraged further research in carbohydrate-based material science.