RNAs as Regulators of Cellular Matchmaking

Area of Science:

• Molecular Biology
• RNA Biology
• Epigenetics

Background:

• RNA molecules increasingly function as scaffolds or decoys, modulating protein-nucleic acid interactions.
• Long non-coding RNAs (lncRNAs) are known regulators of nuclear processes like chromatin state and transcription.
• Emerging evidence highlights cytoplasmic RNA scaffolds and decoys in mRNA translation, decay, and condensate formation.

Purpose of the Study:

• To review the diverse roles of RNA scaffolds and decoys in both nuclear and cytoplasmic compartments.
• To illustrate common mechanistic themes underlying RNA-mediated scaffolding and decoy functions.
• To identify future challenges in the study of RNA scaffolding and decoy functions.

Main Methods:

• Literature review of studies on RNA scaffolds and decoys.
• Analysis of examples from both nuclear and cytoplasmic contexts.
• Synthesis of common principles and identification of research gaps.

Main Results:

• RNA scaffolds and decoys are implicated in nuclear processes (e.g., chromosome topology, chromatin regulation, paraspeckle assembly).
• Cytoplasmic RNA roles include mRNA translation, decay, protein localization, degradation, and P-body assembly.
• Non-coding regions of mRNAs also exhibit scaffold-like functions.

Conclusions:

• RNA's structural and chemical properties make it well-suited for scaffolding and decoy roles.
• Understanding RNA scaffolding and decoy functions is crucial for comprehending gene regulation and cellular organization.
• Further research is needed to fully elucidate the mechanisms and implications of these RNA functions.