Uncovering the functions and mechanisms of regulatory elements-associated non-coding RNAs

Area of Science:

• Molecular Biology
• Genetics
• Epigenetics

Background:

• Regulatory non-coding RNAs (ncRNAs) produced by RNA Polymerase II (Pol II) are increasingly recognized for their roles in cellular processes.
• Thousands of ncRNAs originate from regulatory elements like enhancers and promoters, impacting development, cellular programming, transcription, and genomic stability.

Purpose of the Study:

• To review the mechanisms of regulatory element-associated ncRNAs, focusing on enhancer RNAs (eRNAs) and PROMoter uPstream Transcripts (PROMPTs).
• To contextualize these mechanisms within RNA processing and degradation pathways.
• To summarize recent findings on how ncRNAs function locally or distally to influence cellular fate.

Main Methods:

• Literature review of recent findings on regulatory element-associated ncRNAs.
• Analysis of mechanisms involving RNA processing, degradation, and function.
• Synthesis of a model for ncRNA-mediated regulation of transcription and chromatin structure.

Main Results:

• ncRNAs, particularly eRNAs and PROMPTs, are short-lived molecules involved in regulating transcription and chromatin.
• These ncRNAs can act locally at their sites of production or exert functions at distant genomic locations.
• Mechanisms include both immediate post-transcriptional effects and roles mediated by stabilized ncRNAs.

Conclusions:

• A converging model suggests ncRNAs significantly influence cellular fate by modulating transcription and chromatin structure.
• These regulatory roles may involve interactions with factors participating in 3D nuclear organization.
• Understanding ncRNA mechanisms provides insights into fundamental cellular processes and potential therapeutic targets.