CMP-C9-Azido-sialic Acid—Key modified sugar nucleoside for sugar synthesis and bioconjugation

CMP-C9-Azido-sialic Acid is a chemically modified sugar nucleotide that belongs to the Sugar Nucleotides category. It has important value in the fields of glycobiology, drug development and diagnostic research. By introducing azide groups, it provides a powerful tool for precise modification and functionalization of sugar chains. This molecule not only expands the research boundaries of glycoscience but also lays the foundation for the design of next-generation biotherapeutics.

Chemical Information

Chemical name: Cytidine-5'-monophosphate-9-azidosialic acid

Common name: CMP-C9-Azido-sialic Acid

Chemical formula: C20H28N7Na2O15P

Molecular weight: 683.48 g/mol

Category: Sugar Nucleotides

Structural features

The structure of CMP-C9-Azido-sialic Acid combines the classic sugar nucleotide framework with innovative chemical modifications. Its core features include:

Sugar nucleotide backbone: It is composed of cytidine monophosphate (CMP) and sialic acid parts. It follows the basic connection method of natural sugar nucleotides to ensure its compatibility in the biosynthetic pathway. CMP serves as a donor, providing energy and specificity for glycosylation reactions.

Azide modification site: The introduction of an azide group (-N3) at the C9 position of sialic acid is a key innovation of the molecule. The azide group has a small size and high reaction inertness, but in copper-catalyzed or strain-promoted click chemical reactions, it can undergo efficient and specific cycloaddition reactions with alkynes and other groups to achieve selective labeling and coupling of biomolecules.

Enhanced chemical flexibility: The introduction of the azide group gives the molecule additional reactivity without significantly changing the natural conformation of sialic acid. This allows CMP-C9-Azido-sialic Acid to not only serve as a substrate for enzymatic glycosylation, participating in the biosynthesis of sugar chains, but also serve as a chemical tool to achieve post-modification or functionalization of sugar chains through click chemistry.

Stability and solubility: The phosphate group and sodium ion (based on Na2 in the molecular formula) in the molecule enhance its solubility and stability in aqueous buffer, making it easy to use and store in biological experimental systems.

Main applications and advantages

Core tools for basic research in glycobiology

CMP-C9-Azido-sialic Acid is mainly used to study sialic acid-mediated biological processes. Sialic acid is a common nine-carbon sugar at the ends of glycoproteins and glycolipids, and is involved in key functions such as cell recognition, immune regulation, and pathogen infection. Through an enzymatic reaction, this molecule can be recognized by sialyltransferase as a substrate and introduce azide-modified sialic acid into the sugar chain, thereby tracking and regulating the glycosylation process. This helps reveal the specific mechanisms of action of sugar chains in development, disease and cell signaling.

Glycoengineering and synthetic biology applications

In the field of synthetic biology, this molecule is used to construct modified glycoproteins or glycoconjugates. Through enzymatic or chemoenzymatic strategies, azide-labeled sialic acid is integrated into the sugar chain of target proteins (such as antibodies, enzymes, or cell surface receptors), and then click chemistry is used to connect fluorescent probes, drug molecules, or biopolymers to achieve functional transformation of glycoproteins. This approach provides a new way to develop biologics with enhanced targeting and stability.

Drug Development and Targeted Delivery Systems

The click chemical reaction properties of the azide group make CMP-C9-Azido-sialic Acid an ideal precursor for drug conjugate design. For example, in cancer therapy, sialic acid-modified cell surface sugar chains are often associated with tumor progression. By incorporating this molecule into the sugar synthesis pathway, azide labels can be introduced on the sugar chains of tumor cells and then coupled to toxins or imaging agents to achieve precise targeted therapy and diagnosis. In addition, it can also be used to develop vaccine vectors based on sugar modifications to enhance the controllability of immunogenicity.

Diagnostic and imaging technology development

In the diagnostic field, azide-labeled sialic acid can serve as a biomarker probe. Through metabolic labeling technology, CMP-C9-Azido-sialic Acid is introduced into cells or tissues, and the azide group then clicks with fluorescent or radioactive alkyne probes to visualize glycosylation sites. This is suitable for studying glycosylation changes in disease states (e.g. inflammation, cancer) or developing highly sensitive in vitro detection platforms such as flow cytometry or microscopy imaging.

Optimizing the performance of nucleic acid and glycoconjugates

In addition to protein modification, this molecule can also be applied to the construction of sugar-nucleic acid hybrids. For example, in oligonucleotide therapeutics, by introducing azide-modified sialic acid into the sugar backbone, its pharmacokinetic properties can be improved, such as reducing enzymatic degradation, enhancing cellular uptake, and providing chemical handles for tissue-specific delivery.

Conclusion

CMP-C9-Azido-sialic Acid represents the cutting-edge achievement of chemical modification of sugar nucleotides. Its unique azide functionalization design cleverly combines natural biosynthesis and synthetic chemistry. From the analysis of basic sugar chain functions to the development of innovative drug models, it is promoting the development of glycoscience in a more precise and programmable direction. As glycobiology plays an increasingly important role in the therapeutic field, such tool molecules will surely bring new breakthrough opportunities for infectious disease prevention and control, tumor immunity, and regenerative medicine.

The above information is provided by the editor of KASONS and is for scientific research only.