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Dehydration Synthesis01:15

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Overview
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
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One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
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Related Experiment Video

Updated: Jan 31, 2026

Standardized Modular Assembly of Polycistronic Operons with Modular Cloning (MoClo) using the In-Cloning toolkit
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Microwave-Assisted Thioester-Empowered Toolkit for Modular Glycopeptide Synthesis.

Yue Yang1, Miaomiao Zhang1, Meng-Hai Xiang2

  • 1National Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate and Carbohydrate-conjugate Drugs, Shandong Technology Innovation Center of Carbohydrate, Shandong University, 72 Binhai Road, Qingdao, Shandong 266237, China.

JACS Au
|January 30, 2026
PubMed
Summary
This summary is machine-generated.

A new method for synthesizing complex glycopeptides and glycoproteins uses a novel thioester-functionalized glycosyl amino acid and a microwave-assisted reaction system. This efficient platform accelerates the creation of these valuable molecules for glycoscience and biomedical research.

Keywords:
chemoenzymatic synthesisglycopeptidemicrowavemodular synthesisthioester

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Area of Science:

  • Carbohydrate Chemistry
  • Organic Synthesis
  • Glycobiology

Background:

  • Structurally precise glycopeptides and glycoproteins are essential for functional studies.
  • Conventional methods for synthesizing glycosyl amino acids are inefficient and impractical for widespread use.

Purpose of the Study:

  • To develop a novel and efficient platform for glycopeptide synthesis.
  • To overcome the limitations of existing synthetic strategies for complex carbohydrates.

Main Methods:

  • Development of a thioester-functionalized glycosyl amino acid building block.
  • Utilization of a comprehensive reaction system including AgSbF6 activation, Oxyma additive, DIPEA base, and microwave irradiation.
  • On-resin synthesis enabling rapid conversion and automation.

Main Results:

  • Achieved rapid (10 min) and clean on-resin conversion of glycopeptides.
  • Demonstrated broad effectiveness across diverse glycan structures and multiple peptide coupling sites (27 examples).
  • Showcased seamless integration with enzymatic glycan elaboration and protein ligation for increased structural complexity.

Conclusions:

  • The developed platform offers a robust and versatile approach to glycopeptide and glycoprotein synthesis.
  • This method significantly broadens access to complex glycopeptides and glycoproteins.
  • Provides a powerful entry point for advancements in functional glycoscience and biomedical discovery.