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Related Concept Videos

Protein Glycosylation01:25

Protein Glycosylation

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Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
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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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Proteoglycans01:05

Proteoglycans

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Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
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Glycosaminoglycans01:23

Glycosaminoglycans

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Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are long and linear polymers comprising of specific repeating disaccharides - the amino sugar that can be N-acetylglucosamine or N-acetylgalactosamine, and a uronic acid that is usually glucuronic acid or iduronic acid.
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
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Updated: May 16, 2025

Improved In-gel Reductive &#946;-Elimination for Comprehensive O-linked and Sulfo-glycomics by Mass Spectrometry
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Decrypting Glycosaminoglycan "sulfation code" with Computational Approaches.

Sergey A Samsonov1, Mateusz P Marcisz2

  • 1Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland. sergey.samsonov@ug.edu.pl.

Handbook of Experimental Pharmacology
|April 1, 2025
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Summary
This summary is machine-generated.

Computational methods like molecular docking and dynamics are crucial for understanding glycosaminoglycan (GAG) interactions with proteins. These approaches help decipher the "sulfation code" for regenerative medicine and drug design.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Computational Biology

Background:

  • Glycosaminoglycans (GAGs) are vital extracellular matrix polysaccharides involved in numerous biological processes.
  • GAGs' functions rely on protein interactions, making them targets for regenerative medicine and drug design.
  • Current understanding of protein-GAG interactions is limited due to experimental structure determination challenges.

Purpose of the Study:

  • To explore the challenges and advances in computational methods for studying protein-GAG interactions.
  • To highlight the potential of theoretical approaches in deciphering the GAG "sulfation code."
  • To provide insights into the structure-function relationship of GAG-protein complexes.

Main Methods:

  • Molecular docking
  • Molecular dynamics simulations
  • Free-energy calculations
  • Analysis of GAG-containing systems

Main Results:

  • Computational methods offer a promising avenue to overcome experimental limitations in studying GAGs.
  • These methods provide insights into the complex molecular mechanisms of protein-GAG interactions.
  • Advances in computational approaches are key to understanding the GAG "sulfation code."

Conclusions:

  • Theoretical approaches are essential for elucidating protein-GAG interactions.
  • Understanding these interactions is critical for advancing regenerative medicine and drug design.
  • Computational methods pave the way for novel therapeutic applications involving GAGs.