The Role of Nucleosides

Nucleic acid is an essential biomolecule in the process of life activities, and its basic structural unit is a nucleotide, which is composed of a pentose sugar, base, and phosphate. Which consists of base and pentose sugar and is also known as nucleoside. Nucleoside is a general term for a class of glycosides. Clinical studies have shown that nucleosides and drugs made from them are an important class of drugs for the treatment of viral infections, tumors, and AIDS. Of the antiviral drugs currently in use, 50% are nucleosides. Anti-tumor drugs such as cytarabine and trifluridine also belong to the nucleoside class. In recent years, nucleosides have become the focus of research by pharmaceutical workers.

In the synthesis of nucleosides, there are two main methods: Chemical Synthesis and biological (enzymatic) synthesis. These two synthesis methods have their advantages and have been widely considered and studied by researchers.

Key Technologies

At CD BioGlyco, we leverage specialized enzymatic catalysis—specifically ribose phosphorylase for base-specific nucleoside conversion and deoxyribosyltransferase for purine/pyrimidine interconversions- to synthesize nucleosides efficiently under mild conditions, ensuring high specificity, minimal side reactions, and streamlined purification for antiviral and antitumor drug development.

Beyond Solvents: Enzymatic Pathways to Pure Nucleosides

To produce nucleosides more efficiently, CD BioGlyco has comprehensively researched biological methods to produce nucleosides. At the heart of this method is the catalytic action of enzymes. We offer two enzymes, ribose phosphorylase, and deoxyribosyltransferase, to catalyze the synthesis of nucleosides.

• Ribose phosphorylase catalyzes the conversion of different purine and pyrimidine bases and is strictly base-specific, reducing side reactions and thus catalyzing the production of nucleosides more efficiently.
• Deoxyribosyltransferase catalyzes the conversion between purine bases and purine nucleosides and between pyrimidine bases and pyrimidine nucleosides. No intermediates are produced during the catalytic process.

CD BioGlyco offers a method for the enzymatic production of nucleosides that is characterized by high efficiency, mild reaction conditions, simple operation, high reaction specificity, few side reactions, and simple isolation and purification of reaction products. In the process of nucleoside production, we will continue to optimize the production solution to provide customers with the best production service.

Fig.1 Uses of the two enzymes. (CD BioGlyco)

Workflow

• Prepare Reaction Mixture

Combine the nucleobase, activated sugar derivative (often generated in-situ), appropriate enzyme(s), a suitable buffer (e.g., potassium phosphate), necessary cofactors, and water to the desired final volume.

• Optimize Reaction Conditions

Set and maintain the optimal temperature for enzyme activity. Determine the optimal reaction duration by monitoring progress over time. Ensure the mixture is consistently mixed (stirring or shaking).

• Initiate Reaction

Start the reaction, usually by adding the enzyme(s) last to the prepared mixture.

• Monitor Reaction Progress

Periodically take small samples, immediately quench the enzymatic reaction (e.g., with acetonitrile or heat), and analyze them using analytical techniques like HPLC or TLC to track product formation and conversion rates.

• Terminate Reaction

Stop the reaction once optimal conversion is achieved, often by heat-inactivating the enzyme or precipitating components.

• Purification

Separate the synthesized nucleoside monomer from unreacted materials, enzymes, and byproducts using methods such as chromatography (e.g., ion-exchange, reverse-phase) or precipitation.

• Characterization

Confirm the identity and purity of the isolated nucleoside monomer using analytical techniques like NMR spectroscopy, Mass Spectrometry, and UV-Vis spectroscopy.

Publication Data

Advantages

• Our enzymatic approach ensures exceptional regioselectivity and stereospecificity, leading to nucleoside monomers with significantly higher purity and fewer undesirable isomers, critical for sensitive biological applications.
• Enzymatic synthesis typically operates under mild aqueous conditions, reducing the need for toxic organic solvents and harsh reagents.
• Our validated workflows and stringent quality control measures ensure consistent product quality and reliable supply, supporting your long-term research and development needs.

Applications

• Used in the creation of highly specific probes for PCR, qPCR, FISH, and other nucleic acid-based diagnostic assays for infectious diseases and genetic disorders.
• Building blocks for synthesizing custom DNA and RNA sequences for gene synthesis, CRISPR/Cas9 systems, and artificial gene circuits.
• Integration into novel biomaterials for nanotechnological applications and drug delivery systems.

Frequently Asked Questions

Associated Services

Building on the precision and sustainability of enzymatic synthesis for nucleoside monomers, our integrated production services deliver turnkey solutions for critical biomolecules:

CD BioGlyco has many years of experience in nucleoside production. We provide our clients with multiple routes to produce nucleosides and provide them with better service by continuously optimizing experimental solutions. If you are interested in our services, please feel free to contact us.