Synthesis of 5'-Aldehyde Oligonucleotide
1Département de Chimie Moléculaire, Université Grenoble Alpes, Grenoble, France.
Current Protocols in Nucleic Acid Chemistry
|March 12, 2016
Summary
Researchers developed a new method to synthesize aldehyde-functionalized oligonucleotides (5'-AONs) for both DNA and RNA. This streamlined process allows for routine synthesis and purification, similar to standard oligonucleotide production.
Area of Science:
- Oligonucleotide Chemistry
- Synthetic Biology
- Bioconjugation
Background:
- Aldehyde-functionalized oligonucleotides (5"-AONs) are valuable tools for bioconjugation and molecular assembly.
- Previous synthesis methods for 5"-AONs were often complex and limited in scope.
Purpose of the Study:
- To develop a robust and widely applicable method for synthesizing 5"-AONs.
- To enable routine synthesis and purification of 5"-AONs comparable to standard oligonucleotide production.
Main Methods:
- Mild oxidation of on-support oligonucleotides (ODNs) using Moffat conditions to introduce a 5"-aldehyde.
- Transient protection of the aldehyde using N,N -diphenylethylenediamine derivatives.
- Cleavage, deprotection, and purification via reversed-phase high-performance liquid chromatography (RP-HPLC).
Main Results:
- Successful synthesis of 5 -AONs for both DNA (5 -AODN) and RNA (5 -AORN) series, irrespective of the terminal nucleobase.
- The developed method allows for efficient purification of protected 5 -AONs.
- Final deprotection using acetic acid yields the desired 5 -AONs.
Conclusions:
- The new strategy facilitates the routine synthesis and purification of 5 -AONs.
- This method simplifies the production of aldehyde-functionalized oligonucleotides, making them more accessible for various applications.
- The process is analogous to the established "DMT-On" strategy in oligonucleotide synthesis.
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