Modified Nucleoside Triphosphates for In-vitro Selection Techniques.

Area of Science:

• Biotechnology and Molecular Biology
• Nucleic Acid Chemistry

Background:

• SELEX (Selective Enhancement of Ligands by Exponential Enrichment) is a key method for identifying functional oligonucleotides like aptamers, ribozymes, and DNAzymes.
• Current SELEX applications primarily use natural DNA or RNA, limiting chemical diversity and stability for specific applications.

Purpose of the Study:

• To review recent research on incorporating modified nucleotides into the SELEX process.
• To explore the development of mutant enzymes capable of accepting a broader range of nucleoside triphosphates.
• To briefly discuss the synthesis of modified nucleoside triphosphates.

Main Methods:

• Literature review focusing on SELEX strategies utilizing modified nucleotides.
• Analysis of research on engineered enzymes for expanded nucleoside triphosphate substrate acceptance.
• Compilation of information on the synthesis pathways for modified nucleoside triphosphates.

Main Results:

• Modified nucleotides significantly enhance the chemical and structural diversity of selected aptamers and ribozymes.
• The use of modified nucleotides can improve the stability and functionality of nucleic acid-based molecules.
• Enzyme engineering has successfully broadened the substrate scope for SELEX, accommodating modified nucleoside triphosphates.

Conclusions:

• Integrating modified nucleotides into SELEX is crucial for expanding the utility and applicability of aptamers and ribozymes.
• Advances in enzyme engineering and modified nucleoside triphosphate synthesis are key enablers for next-generation SELEX.
• This approach holds promise for developing novel nucleic acid-based therapeutics, diagnostics, and biotechnological tools.