How to untie G-quadruplex knots and why?

Area of Science:

• Chemical biology
• Genomics
• RNA biology

Background:

• G-quadruplexes (G4s) are crucial structures found in the human genome, transcriptome, and ncRNAome (G4ome).
• Their involvement in human diseases necessitates novel therapeutic strategies.
• For two decades, research focused on G4 stabilization using chemical ligands.

Purpose of the Study:

• To re-evaluate G4-targeting strategies in light of G4 prevalence and disease association.
• To explore the cellular mechanisms of G4 folding and the enzymes that counteract them.
• To present new strategies for designing molecular G4 unwinding agents.

Main Methods:

• Investigating the cellular folding, localization, and timing of G-quadruplex formation.
• Analyzing enzymatic systems involved in G4 resolution and their application as cellular tools.
• Developing novel molecular agents designed to unwind G4 structures.

Main Results:

• G-quadruplexes are prevalent across the human G4ome and implicated in various diseases.
• Enzymatic systems capable of counteracting G4 folding have been identified and utilized.
• New molecular G4 unwinding agents are under development.

Conclusions:

• The field is shifting from G4 stabilization to G4 unfolding strategies.
• Understanding G4 dynamics and cellular manipulation is key for therapeutic development.
• Designing molecular tools to unfold G4s represents a promising new direction in chemical biology.