PRKRA (protein activator of interferon-induced protein kinase EIF2AK2) is a dsRNA-binding protein that functions as a critical regulator of translation control and innate immunity. As a PKR activator, PRKRA can independently sense double-stranded RNA through its dimerized dsRNA-binding domains and sequester eIF2 complexes from the translation machinery, inhibiting global protein synthesis in a PKR-independent manner 1. This mechanism operates particularly in pluripotent cells and early embryos where it restricts RNA virus replication 1. PRKRA also participates in RNA interference pathways, facilitating siRNA processing by DICER1 and RISC complex assembly 1. Additionally, PRKRA modulates p53 function through promoting its sumoylation and phosphorylation in a PKR-dependent manner. Disease-wise, mutations in PRKRA cause DYT16 dystonia, a monogenic form of isolated dystonia characterized by abnormal movements and postures 234. DYT16 involves endoplasmic reticulum stress response pathways; the molecular mechanism linking PRKRA dysfunction to basal ganglia pathology remains incompletely understood 25. Beyond neurological disease, serum PRKRA protein levels associate with long-term benefits in immunotherapy-treated metastatic NSCLC patients 6. PRKRA's role in stress responses—including calcium-triggered stress granule formation during lysosomal damage—highlights its broader cytoprotective functions 7.