Action and function of helicases on RNA G-quadruplexes

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• G-quadruplex (G4) structures in DNA and RNA influence cellular processes.
• RNA G4s (rG4s) are increasingly recognized for their role in cellular homeostasis.
• Proper regulation of G4 structures is essential, as disruptions can lead to genome instability, apoptosis, or proliferation.

Purpose of the Study:

• To review the current knowledge on helicases that process RNA G-quadruplexes (rG4s).
• To focus on the methodological approaches used to study rG4-processing helicases.
• To briefly describe a non-helicase protein involved in rG4 unwinding.

Main Methods:

• Literature review of studies on RNA G-quadruplexes (rG4s) and their processing.
• Analysis of methodological approaches for identifying and characterizing rG4-unwinding helicases.
• Examination of known rG4-processing proteins, including helicases and non-helicase examples.

Main Results:

• Helicases are key negative regulators that prevent and resolve G4 structures.
• Only a limited number of RNA G4 (rG4) unwinding helicases have been identified and characterized.
• The review consolidates current understanding and methodologies in the field.

Conclusions:

• Specialized proteins, particularly helicases, are essential for resolving RNA G-quadruplexes (rG4s).
• Further research is needed to fully characterize the repertoire of rG4-processing helicases.
• Understanding these mechanisms is critical for comprehending cellular homeostasis and disease states.