DSG2

DSG2, or desmoglein-2, is the only desmoglein expressed in all desmosome-bearing tissues, including cardiac muscle, where it is indispensable for intercalated disc integrity. Through calcium-dependent homophilic bonds with other desmosomal cadherins, it couples keratin and desmin intermediate filaments to cell-cell contacts via plakoglobin and desmoplakin. Mutations in DSG2 are a leading cause of arrhythmogenic cardiomyopathy, an inherited disorder of fibrofatty replacement of the myocardium with life-threatening ventricular arrhythmias. Beyond the heart, DSG2 is frequently overexpressed in carcinomas, where it supports proliferation and invasion, making it both a genetic disease gene and an antibody-target candidate.