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Related Concept Videos

Glycosaminoglycans01:23

Glycosaminoglycans

5.5K
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.
Hyaluronic...
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Proteoglycans01:05

Proteoglycans

4.1K
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,...
4.1K
Matrix Proteoglycans and Glycoproteins01:21

Matrix Proteoglycans and Glycoproteins

4.2K
Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
4.2K
Protein Glycosylation01:25

Protein Glycosylation

7.9K
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...
7.9K
Oligosaccharide Assembly01:24

Oligosaccharide Assembly

3.1K
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.
Multiple sugar molecules that may or may...
3.1K
Glycocalyx and its Functions01:14

Glycocalyx and its Functions

6.5K
The glycocalyx is a carbohydrate-rich, fuzzy-appearing layer on the outer surface of the cell membrane. It is highly hydrophilic, because of this it attracts large amounts of water to the cell's surface. This aids the cell's interaction with the watery environment and also helps it to obtain substances dissolved in the water. It is also important for cell identification, self/non-self determination, and embryonic development and is used in cell-to-cell attachments to form tissues.
6.5K

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Related Experiment Video

Updated: Oct 21, 2025

Detection of Glycosaminoglycans by Polyacrylamide Gel Electrophoresis and Silver Staining
05:57

Detection of Glycosaminoglycans by Polyacrylamide Gel Electrophoresis and Silver Staining

Published on: February 25, 2021

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Glycosaminoglycans.

Yuefan Song1,2, Fuming Zhang3, Robert J Linhardt4

  • 1National R&D Branch Center for Seaweed Processing, College of Food Science and Engineering, Dalian Ocean University, Dalian, PR China. syf@dlou.edu.cn.

Advances in Experimental Medicine and Biology
|September 8, 2021
PubMed
Summary
This summary is machine-generated.

Glycosaminoglycans (GAGs), essential components of the human glycome, are crucial in biological development and disease. Research explores their roles in various pathologies and therapeutic applications.

Keywords:
CancerGlycomicsGlycosaminoglycansHeparinInfectious diseaseInnate disease

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Detection of Glycosaminoglycans by Polyacrylamide Gel Electrophoresis and Silver Staining
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Identification and Characterization of Protein Glycosylation using Specific Endo- and Exoglycosidases
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Identification and Characterization of Protein Glycosylation using Specific Endo- and Exoglycosidases

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Glycomics

Background:

  • Glycosaminoglycans (GAGs) are negatively charged polysaccharides, often attached to proteins as proteoglycans.
  • They are vital for biological development and implicated in numerous disease pathologies.
  • GAGs exhibit significant bioactivities, leading to their therapeutic use or targeting in disease treatment.

Purpose of the Study:

  • To introduce the four main classes of glycosaminoglycans.
  • To discuss the pathological roles of GAGs in diseases like innate disease, infectious disease, and cancer.
  • To review the therapeutic applications of GAGs and their mimetics, including methods based on their pathogenic roles.

Main Methods:

  • Literature review and synthesis of existing research on glycosaminoglycans.
  • Categorization of GAGs based on their biochemical characteristics.
  • Analysis of GAGs' involvement in disease pathogenesis and therapeutic strategies.

Main Results:

  • Detailed characteristics of the four GAG classes are presented.
  • Pathological implications of GAGs in major diseases are discussed.
  • Current and emerging therapeutic applications of GAGs and related compounds are outlined.

Conclusions:

  • Glycosaminoglycans are fundamental molecules with diverse biological functions and disease relevance.
  • Understanding GAGs' roles is key to developing novel therapeutic interventions.
  • Historical research and technological advancements have significantly propelled GAG and glycomics studies.