NELFE (negative elongation factor complex member E) is a core component of the NELF complex that regulates RNA polymerase II (Pol II) transcription through promoter-proximal pausing. NELFE functions as part of a multi-protein elongation control system that maintains Pol II in a paused state at gene promoters and enhancers 1. Upon appropriate signals, P-TEFb kinase phosphorylates NELF and associated factors, allowing PAF1 complex to displace NELF and release Pol II for productive elongation 1. Under cellular stress, NELFE undergoes SUMOylation and dephosphorylation, forming nuclear condensates that enhance NELF recruitment to promoters and drive coordinated transcriptional downregulation—a stress-survival mechanism paralleling cytosolic stress granules 2. Promoter-proximal pausing controlled by NELFE depends on chr6 architecture maintained by histone chaperones 3. Therapeutically, NELF ablation in macrophages or CDK7 inhibition that disrupts the Pol II pause-release cycle ameliorates inflammatory arthritis by selectively suppressing pro-inflammatory gene expression 4. Additionally, NELFE is implicated in breast cancer progression through a miR-4510/NELFE regulatory axis that enhances glycolysis 5. NELFE's role in HIV-1 latency involves potential NELF-complex recruitment to paused Pol II, though molecular details remain incompletely characterized.