Related Experiment Video
Updated: May 16, 2026
12:02
Automated Modular High Throughput Exopolysaccharide Screening Platform Coupled with Highly Sensitive Carbohydrate Fingerprint Analysis
Published on: April 11, 2016
Bacterial exopolysaccharides: functionality and prospects
Uchechukwu U Nwodo1, Ezekiel Green, Anthony I Okoh
1Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa. UNwodo@ufh.ac.za.
International Journal of Molecular Sciences
|December 4, 2012
Summary
Bacterial exopolysaccharides are versatile polymers with significant industrial and medical applications. This overview details their functions, diverse uses, and future potential in various sectors.
Area of Science:
- Microbiology
- Biochemistry
- Polymer Science
Background:
- Bacteria synthesize diverse polysaccharides, known as exopolysaccharides (EPS), secreted externally.
- EPS can be homopolymeric or heteropolymeric with high molecular weights (10-1000 kDa).
- The unique properties of EPS have led to widespread industrial and medical applications.
Purpose of the Study:
- To provide an overview of bacterial exopolysaccharides.
- To discuss their physiological and morphological functions.
- To highlight their current applications and future prospects in medical and industrial fields.
Main Methods:
- Literature review of bacterial exopolysaccharide synthesis and properties.
- Analysis of functional applications across various sectors.
- Exploration of potential future uses and research directions.
Main Results:
- Exopolysaccharides exhibit diverse structures and functionalities.
- Key applications include pharmacological, nutraceutical, cosmeceutical, and agricultural uses.
- Promising prospects include roles as anticoagulants, anticancer agents, and bioflocculants.
Conclusions:
- Bacterial exopolysaccharides are valuable biomaterials with broad utility.
- Their versatile applications span multiple industries, from medicine to agriculture.
- Continued research promises further innovation and expanded use of these compounds.
Related Concept Videos
01:18Outer Layers of the Cell Envelope
The outermost layers of prokaryotic cells play a critical role in their survival, virulence, and interaction with the environment. These layers, often composed of polysaccharides, polypeptides, or proteins, form protective and adhesive structures that vary in organization and function.Capsules and Slime LayersCapsules are highly organized, tightly bound layers that firmly attach to the bacterial cell wall. Capsules are usually made of polysaccharides, though some are made of polypeptides. These...
01:19Formation of Lipopolysaccharides
Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin, triggering...
01:14Glycocalyx 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...
Components of...
01:26Biosynthesis 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...
01:05Proteoglycans
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,...
01:24Oligosaccharide 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...
Multiple sugar molecules that may or may...