NOVA1 is a neuron-specific RNA-binding protein that regulates alternative splicing in the brain and spinal cord by recognizing 5'-YCAY-3' sequence repeats on pre-mRNA 1. Depending on binding location, NOVA1 mediates both exon inclusion and exclusion through modulation of spliceosome assembly; exonic binding blocks U1 snRNP and inhibits inclusion, while intronic binding promotes inclusion 1. NOVA1 regulates splicing of neurodevelopmentally critical genes including GABRG2 and GLRA2, and autoregulates its own splicing through exon 4 exclusion 1. A human-specific I197V substitution in NOVA1's RNA-binding domain is unique to modern humans and influences alternative splicing patterns affecting vocalization-related genes, potentially contributing to language evolution 2. NOVA1 also plays human-specific roles in white adipogenesis by preventing unfolded protein response overactivation and regulating DNAJC10 splicing 3. Clinical relevance includes neurodevelopmental disorders, where NOVA1 haploinsufficiency causes motor hyperactivity through hypothalamic Impact mRNA stabilization 4. In cancer, NOVA1 acts oncogenically in glioblastoma by antagonizing miRNA-mediated transcript degradation of cholesterol homeostasis genes 5. NOVA1 serves as a prognostic biomarker in head and neck squamous cell carcinoma, where inflammation induces and epigenetic dysregulation suppresses its expression 6.