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Peptidoglycan Synthesis01:28

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Structure of PeptidoglycanPeptidoglycan is a vital structural component of the bacterial cell wall, providing mechanical strength and shape to the cell. It consists of repeating units of two sugars—N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)—linked by β-1,4 glycosidic bonds. These sugar chains are cross-linked by short peptide chains, forming a mesh-like polymer that surrounds the bacterial plasma membrane.Cytoplasmic Phase – Precursor SynthesisPeptidoglycan...
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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...
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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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Accelerated Solid Phase Glycan Synthesis: ASGS.

Yasmeen Bakhatan1, Israel Alshanski1, Chieh-Kai Chan2

  • 1The institute of chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 10, 2023
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Summary

Accelerated solid-phase synthesis of oligosaccharides is now possible using high shear mixing. This method significantly reduces reaction times and reagent usage for faster biological oligomer preparation.

Keywords:
diffusionglycosylationmixingoligosaccharidessolid-phase synthesis

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Area of Science:

  • Carbohydrate Chemistry
  • Chemical Biology
  • Synthetic Organic Chemistry

Background:

  • Solid-phase synthesis is a key method for creating biological oligomers, but it is slow for oligosaccharides.
  • Current methods require specific conditions, excess reagents, and specialized equipment, risking side reactions.
  • Accelerating oligosaccharide synthesis is crucial for advancing chemical biology applications.

Purpose of the Study:

  • To develop an accelerated solid-phase synthesis method for oligosaccharides.
  • To improve the efficiency and speed of oligosaccharide assembly.
  • To reduce reagent requirements and simplify the synthesis process.

Main Methods:

  • Utilized high shear mixing to enhance diffusion and reaction kinetics on solid supports.
  • Optimized deprotection and glycosylation steps to occur at the same temperature for continuous processing.
  • Minimized the need for inert atmospheres and reduced the excess of glycosyl donors.

Main Results:

  • Achieved significantly accelerated solid-phase oligosaccharide synthesis.
  • Demonstrated rapid glycosylation reactions due to efficient mixing.
  • Completed full glycosylation cycles in minutes, reducing overall synthesis time.
  • Minimized reagent consumption and eliminated the need for an inert gas atmosphere.

Conclusions:

  • High shear mixing is an effective strategy for accelerating solid-phase oligosaccharide synthesis.
  • This approach offers a faster, more efficient, and potentially more cost-effective method for producing oligosaccharides.
  • The developed method has significant implications for chemical biology and the synthesis of complex carbohydrates.