COMMD6 is a scaffold protein essential for endosomal recycling of transmembrane cargo through its role in the commander complex, which comprises the CCC subcomplex (CCDC22, CCDC93, C16orf62) and the retriever subcomplex 12. The protein functions primarily through its COMM domain, a conserved motif critical for its inhibitory effects on NF-kappaB signaling 3. COMMD6 directly interacts with COMMD1 and inhibits TNF-induced NF-kappaB activation, though through mechanisms distinct from COMMD1, as it does not bind IkappaBalpha 3. The CCC complex regulates recycling of key receptors including LDLR and ATP7B; hepatic COMMD6 deficiency destabilizes the entire CCC complex, impairing LDLR trafficking and elevating plasma LDL cholesterol levels while exacerbating atherosclerosis 45. COMMD6 deficiency also causes hepatic copper accumulation under high-copper diets 5. Beyond lipid metabolism, COMMD6 has been implicated in diabetic retinopathy susceptibility in Chinese populations 6 and identified as a hub gene in acute mountain sickness pathways 7. These findings establish COMMD6 as a multifunctional regulator of both metabolic homeostasis and inflammatory signaling with potential clinical relevance to cardiovascular and metabolic disease.