COPS7A (COP9 signalosome subunit 7A) is a core component of the COP9 signalosome (CSN) complex, a multi-subunit regulatory complex involved in ubiquitin-dependent protein degradation pathways. The CSN complex mediates deneddylation of cullin subunits in E3 ligase complexes, thereby regulating their ubiquitin ligase activity. COPS7A contributes to CSN-dependent phosphorylation of key signaling proteins, including IκBα, leading to modulation of NF-κB pathway activity 1. The gene's expression is dysregulated across multiple disease contexts, suggesting broad pathophysiological relevance. In gastric cancer, COPS7A is functionally important for NF-κB signaling regulation and tumor progression 1, while it is significantly upregulated in asthenozoospermia 2. COPS7A has been identified as a component of prognostic signatures in colon cancer 3 and dilated cardiomyopathy 4, and serves as a biomarker in obsessive-compulsive disorder diagnosis 5. Interestingly, COPS7A expression is consistently downregulated across autism, schizophrenia, and bipolar disorder in cortical tissue 6, suggesting potential neurodevelopmental significance. COPS7A is also implicated in Pallister-Killian syndrome pathogenesis through overexpression associated with tetrasomy 12p 7. These findings indicate COPS7A functions as a critical signaling hub with disease relevance extending from cancer biology to neuropsychiatric and developmental disorders.