CNKSR3 is a scaffold protein that functions as a direct mineralocorticoid receptor (MR) target gene regulating transepithelial sodium transport 1. Upon aldosterone stimulation, CNKSR3 is upregulated in renal cortical collecting duct cells, where it coordinates assembly of an ENaC-regulatory complex that enhances epithelial sodium channel (ENaC)-mediated sodium transport while decreasing MEK phosphorylation 1. Beyond renal sodium homeostasis, CNKSR3 has emerged as relevant to multiple disease contexts. Genome-wide association studies identified CNKSR3 variants associated with diabetic kidney disease susceptibility across diverse ancestral groups 23, and with epilepsy risk in north Indian populations 4. CNKSR3 also functions as a microRNA target; miR-1 regulates CNKSR3 expression in pulmonary endothelium to protect against acute lung injury 5, while miR-15a-5p targets CNKSR3 in non-small cell lung cancer pathogenesis 6. Additionally, CNKSR3 methylation patterns differ in sarcopenic versus non-sarcopenic older women, suggesting epigenetic involvement in age-related muscle loss 7, and altered CNKSR3 expression distinguishes aspirin-exacerbated respiratory disease from aspirin-tolerant asthma 8. These findings establish CNKSR3 as a multifunctional regulator with implications for renal, metabolic, neurological, pulmonary, and musculoskeletal pathologies.