GEMIN4 is an essential component of the survival motor neuron (SMN) complex that plays a critical role in the assembly and maturation of small nuclear ribonucleoproteins (snRNPs), which are fundamental building blocks of the spliceosome 1. The protein facilitates nuclear import of the SMN complex through putative nuclear localization signals and is required for proper snRNP biogenesis 1. GEMIN4 demonstrates essential function in mammalian development, as null mice die early in embryonic development 1. Beyond its core role in RNA processing, GEMIN4 functions as a coregulator of the mineralocorticoid receptor, repressing agonist-induced transactivation in a cell-specific manner 2. Pathogenic variants in GEMIN4 cause an autosomal recessive neurodevelopmental disorder characterized by microcephaly, cataracts, and renal abnormalities (NEDMCR syndrome), with all affected patients showing global developmental delay and variable ophthalmological, renal, and skeletal manifestations 3. The protein has also been identified as a potential therapeutic target in basal-like breast cancer, where high expression correlates with poor prognosis 4. GEMIN4's involvement in pre-mRNA splicing through interaction with galectin-1 and galectin-3 further emphasizes its importance in cellular RNA metabolism 5.