[Guanine Quadruplexes in Cell Nucleus Metabolism].

Area of Science:

• Molecular Biology
• Biochemistry
• Genetics

Background:

• Cell metabolism relies on precise gene expression regulation.
• Nucleic acid secondary structures, particularly guanine quadruplexes (G4), are key regulatory elements.
• G4 structures are dynamic and influenced by ionic conditions, size, and nucleic acid composition.

Purpose of the Study:

• To review the structure and thermodynamic properties of G-quadruplexes.
• To explore the interactions between G-quadruplexes and nuclear proteins.
• To highlight the significance of G4 structures in biological processes and as therapeutic targets.

Main Methods:

• Literature review focusing on G-quadruplex structure and thermodynamics.
• Analysis of G-quadruplex interactions with nuclear proteins.
• Synthesis of current research on G4 roles in gene regulation and disease.

Main Results:

• G-quadruplex stability is modulated by various factors including ion concentration and sequence.
• G4 structures are involved in critical cellular functions like telomere maintenance and translation initiation.
• Specific nuclear proteins interact with G4s, influencing their formation and function.

Conclusions:

• G-quadruplexes are vital regulators of gene expression with diverse biological roles.
• Understanding G4 structure-thermodynamics and protein interactions is crucial for biological insights.
• G4s represent a promising frontier for novel anticancer drug development.