SCNN1A is a gene that provides instructions for making a protein called the epithelial sodium channel (ENaC). This protein is primarily found in the cells lining the lungs, kidneys, and other tissues, where it plays a crucial role in regulating sodium and fluid balance in the body. Mutations in the SCNN1A gene can lead to various health issues, including Liddle syndrome, a condition characterized by high blood pressure and low potassium levels. Understanding the function of SCNN1A is important for developing treatments for related disorders and improving overall health.