Related Experiment Video

Updated: Aug 11, 2026

Identification and Characterization of Protein Glycosylation using Specific Endo- and Exoglycosidases
09:54

Identification and Characterization of Protein Glycosylation using Specific Endo- and Exoglycosidases

Published on: December 26, 2011

Regulatory aspects of glycosaminoglycan biosynthesis

G De Luca, A A Castellani

    Acta Biologica Hungarica
    |January 1, 1984
    PubMed

    More Related Videos

    Glycan Node Analysis: A Bottom-up Approach to Glycomics11:36

    Glycan Node Analysis: A Bottom-up Approach to Glycomics

    Published on: May 22, 2016

    Detection of Glycosaminoglycans by Polyacrylamide Gel Electrophoresis and Silver Staining05:57

    Detection of Glycosaminoglycans by Polyacrylamide Gel Electrophoresis and Silver Staining

    Published on: February 25, 2021

    Related Concept Videos

    Protein Glycosylation01:25

    Protein Glycosylation

    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...
    Oligosaccharide Assembly01:24

    Oligosaccharide Assembly

    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...
    Proteoglycans01:05

    Proteoglycans

    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,...
    Glycosaminoglycans01:23

    Glycosaminoglycans

    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...
    Matrix Proteoglycans and Glycoproteins01:21

    Matrix Proteoglycans and Glycoproteins

    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...
    Biosynthesis of Polysaccharides01:26

    Biosynthesis of Polysaccharides

    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...