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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,...
Glycocalyx and its Functions01:14

Glycocalyx and its Functions

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.
Components of...
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...
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.
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Generation of Null Mutants to Elucidate the Role of Bacterial Glycosyltransferases in Bacterial Motility
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Generation of Null Mutants to Elucidate the Role of Bacterial Glycosyltransferases in Bacterial Motility

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Glycoconjugate glycosyltransferases.

Koichi Furukawa1, Akiko Tsuchida, Tetsuya Okajima

  • 1Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya 466-0065, Japan. koichi@med.nagoya-u.ac.jp

Glycoconjugate Journal
|August 7, 2008
PubMed
Summary
This summary is machine-generated.

This study details assay methods for key glycosyltransferases involved in synthesizing glycosphingolipids, N-glycans, O-glycans, and glycosaminoglycans. It also summarizes their cellular locations and protein complex formations.

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Glycan Node Analysis: A Bottom-up Approach to Glycomics
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Glycan Node Analysis: A Bottom-up Approach to Glycomics

Published on: May 22, 2016

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Generation of Null Mutants to Elucidate the Role of Bacterial Glycosyltransferases in Bacterial Motility
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Generation of Null Mutants to Elucidate the Role of Bacterial Glycosyltransferases in Bacterial Motility

Published on: March 11, 2022

Glycan Node Analysis: A Bottom-up Approach to Glycomics
11:36

Glycan Node Analysis: A Bottom-up Approach to Glycomics

Published on: May 22, 2016

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Glycobiology

Background:

  • Glycosyltransferases (GTs) are crucial enzymes catalyzing the transfer of glycosyl units.
  • Aberrant GT activity is linked to various diseases, including cancer and developmental disorders.
  • Understanding GT function requires robust methods for their characterization.

Purpose of the Study:

  • To provide a comprehensive overview of current assay methods for diverse glycosyltransferases.
  • To summarize the intracellular localization patterns of various GTs.
  • To review recent findings on GT protein complex formation.

Main Methods:

  • Literature review and synthesis of published data on GT assay methodologies.
  • Compilation of studies detailing GT subcellular localization using techniques like immunofluorescence and cell fractionation.
  • Analysis of recent research on GT interactions with subunits, chaperones, and regulators.

Main Results:

  • Detailed descriptions of assay methods for GTs involved in glycosphingolipid, N-glycan, O-glycan, and glycosaminoglycan synthesis.
  • Comprehensive summary of GT intracellular localization across different cellular compartments.
  • Recent insights into the assembly of GTs into functional protein complexes.

Conclusions:

  • Standardized and novel assay methods are essential for advancing glycosyltransferase research.
  • Intracellular localization provides critical context for GT enzymatic activity.
  • Understanding GT complex formation is key to elucidating their regulatory mechanisms and biological roles.