Modified Nucleosides
Modified Nucleosides - Related Videos
15:22
Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
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Cited by 4 •
2014
The protocol described herein aims to explain and abridge the numerous obstacles in the way of the intricate route leading to modified nucleoside triphosphates. Consequently, this protocol facilitates both the synthesis of these activated building-blocks and their availability for practical applications.
06:38
Plant Sample Preparation for Nucleoside/Nucleotide Content Measurement with An HPLC-MS/MS
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Cited by 3 •
2021
A precise and reproducible method for in vivo nucleosides/nucleotides quantification in plants is described here. This method employs an HPLC-MS/MS.
02:48
Labeling of Replicating HSV-1 Genomes with a Nucleoside Analog
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2026
Source: Dembowski, J. A., Deluca, N. A. Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins. J. Vis. Exp. (2017)This video demonstrates the infection of stationary-phase mammalian cells with HSV-1 (Herpes Simplex Virus-1), followed by replication of the viral genome using host and viral replication machinery. A synthetic nucleoside analog is incorporated into newly synthesized viral DNA to label replicating genomes, which are subsequently isolated for...
01:22
Antiviral Nucleoside Inhibitors
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2026
Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...
08:46
Regioselective O-Glycosylation of Nucleosides via the Temporary 2',3'-Diol Protection by a Boronic Ester for the Synthesis of Disaccharide Nucleosides
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Cited by 3 •
2018
Here, we present protocols for the synthesis of disaccharide nucleosides by the regioselective O-glycosylation of ribonucleosides via a temporary protection of their 2',3'-diol moieties utilizing a cyclic boronic ester. This method applies to several unprotected nucleosides such as adenosine, guanosine, cytidine, uridine, 5-methyluridine, and 5-fluorouridine to give corresponding disaccharide nucleosides.
FAQs
Each modification changes a different set of molecular properties. Sugar alterations can affect conformation, while base changes can influence hydrogen bonding and recognition. Phosphate-related changes may alter interactions with nucleic-acid pathways. By selecting the site and nature of the chemical change, researchers can tune cellular uptake, enzymatic recognition, and resistance to metabolic degradation for a particular research or therapeutic goal.
Hydrogen bonding helps determine how a nucleoside interacts with nucleic-acid structures and biological recognition systems. Molecular conformation, meaning the three-dimensional arrangement adopted by the molecule, can also control whether enzymes or nucleic-acid pathways recognize it efficiently. Consequently, even a targeted structural change may modify binding behavior, nucleic-acid structure, and the biological activity observed in an experiment.
Chemical changes can make a nucleoside more or less compatible with the active sites and recognition requirements of enzymes. They may also increase resistance to metabolic degradation, allowing the compound to persist longer in a biological setting. These effects are closely related: altered recognition can change pathway selectivity, while improved stability can affect cellular exposure and the strength or duration of a measured response.
Improving one property may influence several others because sugar, base, and phosphate-related groups contribute to recognition, conformation, uptake, and stability. A structure that resists degradation may not interact with a target pathway in the desired way, for example. Researchers therefore compare modifications according to the intended outcome, balancing selective nucleic-acid interactions with suitable physical, chemical, and biological behavior.
A typical chemistry investigation includes designing a structural change, synthesizing the resulting compound, and characterizing its properties. Characterization determines whether the intended molecular structure and relevant chemical features are present. Researchers then examine how those features affect molecular recognition, nucleic-acid structure, or interactions with nucleic-acid pathways. This workflow connects molecular design with experimentally observed behavior.
They are useful when researchers need to probe how particular molecular features control RNA or DNA function. Because their structures can be modified in targeted ways, they help investigate molecular recognition and nucleic-acid structure rather than treating nucleosides as chemically fixed components. The resulting comparisons can reveal how altered hydrogen bonding, conformation, or pathway recognition contributes to nucleic-acid behavior.
Their tunable properties support antiviral and anticancer drug development, nucleic-acid therapeutics, and diagnostic probes. In these settings, researchers can evaluate whether a structural change produces useful pathway selectivity, cellular uptake, or resistance to metabolic degradation. The same chemical principles also help explain why a candidate compound may show different behavior from an unmodified nucleoside in biological systems.
Chemical characterization can establish how an alteration affects the compound's physical and chemical properties and whether the intended structural features are present. Interpreting those findings alongside molecular recognition or nucleic-acid studies helps connect structure with function. In chemistry, this relationship is important for refining compounds used to study RNA and DNA or to develop biomedical and diagnostic applications.