SCNNG Human Protein

ENaC-gamma: Sodium permeable non-voltage-sensitive ion channel inhibited by the diuretic amiloride. Mediates the electrodiffusion of the luminal sodium (and water, which follows osmotically) through the apical membrane of epithelial cells. Controls the reabsorption of sodium in kidney, colon, lung and sweat glands. Also plays a role in taste perception. Defects in SCNN1G are a cause of Liddle syndrome (LIDDS). It is an autosomal dominant disorder characterized by pseudoaldosteronism and hypertension associated with hypokalemic alkalosis. The disease is caused by constitutive activation of the renal epithelial sodium channel. Defects in SCNN1G are the cause of bronchiectasis with or without elevated sweat chloride type 3 (BESC3). A debilitating respiratory disease characterized by chronic, abnormal dilatation of the bronchi and other cystic fibrosis-like symptoms in the absence of known causes of bronchiectasis (cystic fibrosis, autoimmune diseases, ciliary dyskinesia, common variable immunodeficiency, foreign body obstruction). Clinical features include sub-normal lung function, sinopulmonary infections, chronic productive cough, excessive sputum production, and elevated sweat chloride in some cases. Belongs to the amiloride-sensitive sodium channel (TC 1.A.6) family. SCNN1G subfamily.

Protein type: Channel, sodium; Membrane protein, multi-pass; Transporter, ion channel; Membrane protein, integral

Chromosomal Location of Human Ortholog: 16p12

Cellular Component: integral to plasma membrane; apical plasma membrane; plasma membrane; external side of plasma membrane

Molecular Function: amiloride-sensitive sodium channel activity; protein binding; WW domain binding; sodium channel activity

Biological Process: sensory perception of taste; response to stimulus; sodium ion transport; sodium ion homeostasis; multicellular organismal water homeostasis; excretion; transmembrane transport

Disease: Bronchiectasis With Or Without Elevated Sweat Chloride 3; Pseudohypoaldosteronism, Type I, Autosomal Recessive; Liddle Syndrome