# eNRSA: a faster and more powerful approach for nascent transcriptome analysis

## TL;DR

eNRSA is a faster and more versatile tool for analyzing nascent RNA data, improving the study of gene regulation and transcription dynamics.

## Contribution

eNRSA introduces adaptive transcript selection, cross-species compatibility, and a 20-fold speed increase for nascent transcriptome analysis.

## Key findings

- eNRSA supports any organism with known gene structures and complex study designs.
- The tool identifies alternative transcription start/termination sites and transcription readthrough events.
- eNRSA significantly reduces memory usage while increasing analysis speed by ∼20-fold.

## Abstract

Nascent RNA sequencing tracks primary transcriptional events, making it crucial for studying the immediate regulatory changes of genes and enhancers in response to both endogenous and exogenous stimuli. NRSA is a widely used tool for analyzing nascent transcriptomic data, enabling quantification of transcriptional changes at proximal promoters and gene bodies, estimation of pausing indices, identifying active enhancers, and establishing enhancer–target gene relationships. To improve its functionality and broaden its applicability to diverse organisms and complex study designs, we have developed an enhanced version, eNRSA. Key advancements include adaptive selection of major transcripts, support for any organism with known gene structures, compatibility with complex study designs, and identification of alternative transcription start and termination sites, as well as transcription readthrough events. Additionally, eNRSA achieves a ∼20-fold increase in analysis speed while significantly reducing memory usage. These enhancements make eNRSA a faster, more versatile, and more powerful tool for nascent transcriptome analysis. eNRSA is freely available at https://bioinfo.vanderbilt.edu/eNRSA/.