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A Computational Pipeline for Intergenic/Intragenic Enhancer RNA Quantification in Mouse Embryonic Stem Cells
Published on: October 28, 2025
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Enhancer RNA facilitates NELF release from immediate early genes
Katie Schaukowitch1, Jae-Yeol Joo1, Xihui Liu1
1Department of Neuroscience, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9111, USA.
Molecular Cell
|September 30, 2014
Summary
Enhancer RNAs (eRNAs) act as decoys for the negative elongation factor (NELF) complex, promoting gene transcription in neurons. This mechanism facilitates the release of paused RNA polymerase II (RNAPII) for productive gene expression.
Area of Science:
- Molecular Biology
- Genetics
- Neuroscience
Background:
- Enhancer RNAs (eRNAs) are long noncoding RNAs transcribed from active enhancers.
- The precise functions and regulatory mechanisms of eRNAs remain largely undefined.
- Understanding eRNA roles is crucial for deciphering gene expression control.
Purpose of the Study:
- To elucidate the function and mechanism of eRNAs in regulating gene transcription.
- To investigate the role of eRNAs in the context of immediate early gene (IEG) induction in neurons.
- To determine how eRNAs influence the activity of RNA polymerase II (RNAPII) and associated factors.
Main Methods:
- Investigated eRNA synthesis and localization relative to target gene transcription.
- Utilized knockdown strategies to assess the impact of eRNAs on NELF complex dynamics.
- Analyzed changes in target gene mRNA induction and enhancer-promoter interactions.
Main Results:
- eRNAs are synthesized before peak transcription and interact with the negative elongation factor (NELF) complex.
- Knockdown of neuronal eRNAs disrupted NELF release from target promoters during transcriptional activation.
- Reduced eRNA levels correlated with decreased induction of target mRNAs, while enhancer-promoter interactions remained intact.
Conclusions:
- eRNAs act as decoys for the NELF complex, facilitating the transition of paused RNAPII to productive elongation.
- eRNAs play a critical role in the spatiotemporal regulation of early transcriptional elongation at specific gene loci.
- Chromatin looping may facilitate the local action of eRNAs at neuronal promoters.
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