Direct roles of long non-coding RNAs in transcription activation

Area of Science:

• Molecular Biology
• Genomics
• Gene Regulation

Background:

• Gene expression is a complex process involving transcription initiation and regulation.
• The noncoding genome plays a crucial role in controlling gene activation.
• Long noncoding RNAs (lncRNAs) and enhancer RNAs (eRNAs) are key regulators.

Purpose of the Study:

• To discuss the pivotal roles of lncRNAs and eRNAs in regulating transcription.
• To explore how these noncoding RNAs influence gene activation.
• To propose models for lncRNA action in gene expression.

Main Methods:

• Literature review and synthesis of current research on lncRNAs and eRNAs.
• Discussion of lncRNA interactions with transcription factors and genomic elements.
• Analysis of lncRNA production sites and accumulation in biomolecular condensates.

Main Results:

• lncRNAs and eRNAs act as genomic rheostats, modulating transcription magnitude and duration.
• These RNAs function in trans by influencing transcription factors and co/post-transcriptional processes.
• They also act in cis through interactions with enhancers, promoters, and other noncoding RNA genes.

Conclusions:

• lncRNAs are often produced at active enhancers or TAD boundaries and can form biomolecular condensates.
• Proposed models integrate chromatin states and DNA-RNA-protein interactions.
• Understanding lncRNA roles is essential for a comprehensive view of gene expression regulation.