SCNN1D is a gene that encodes a protein known as the epithelial sodium channel (ENaC) subunit delta. This protein plays a crucial role in regulating sodium balance and fluid homeostasis in the body, particularly in the kidneys and lungs. Mutations in the SCNN1D gene can lead to various health issues, including conditions related to electrolyte imbalance. The SCNN1D gene is part of a larger family of sodium channel genes, which includes SCNN1A and SCNN1B. These genes work together to maintain proper sodium levels in cells, influencing blood pressure and overall fluid regulation. Understanding SCNN1D is important for research into related diseases and potential treatments.