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Related Concept Videos

Oligosaccharide Assembly01:24

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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Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
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Generating 3D models of complex carbohydrates with GLYCAM-Web.

Oliver C Grant1, Daniel Wentworth1, Samuel G Holmes1

  • 1Complex Carbohydrate Research Center and Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA, USA.

Nature Methods
|March 24, 2026
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Summary
This summary is machine-generated.

GLYCAM-Web offers new online tools for predicting 3D structures of carbohydrates. These tools aid in data interpretation, hypothesis generation, and molecular simulations for various complex carbohydrates.

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Area of Science:

  • Carbohydrate Chemistry
  • Computational Chemistry
  • Structural Biology

Background:

  • Accurate three-dimensional (3D) structural information is crucial for understanding carbohydrate function.
  • Existing methods for predicting carbohydrate structures can be limited in scope and accessibility.
  • The GLYCAM-Web platform provides a valuable resource for computational glycobiology.

Purpose of the Study:

  • To introduce novel online 3D structure-prediction tools available through GLYCAM-Web.
  • To enable the generation of experimentally consistent 3D structures for a wide range of carbohydrate types.
  • To support diverse applications including data interpretation, hypothesis generation, visualization, molecular docking, and simulations.

Main Methods:

  • Development and implementation of online 3D structure-prediction algorithms.
  • Integration of tools within the GLYCAM-Web framework (www.glycam.org).
  • Linking to external databases like the Protein Data Bank for data comparison.

Main Results:

  • The tools support the modeling of diverse carbohydrate structures, including oligosaccharides, polysaccharides, glycosaminoglycans, glycomaterials, and glycoproteins.
  • Generated 3D structures are suitable for experimental data interpretation and hypothesis generation.
  • The platform facilitates molecular docking and simulation studies.

Conclusions:

  • GLYCAM-Web provides powerful, accessible tools for 3D carbohydrate structure prediction.
  • These tools enhance research in glycobiology by supporting various computational and experimental endeavors.
  • The integration with external databases facilitates validation and comparative analysis with experimental data.