Dystonin (DST)

Dystonin (DST) is a large cytoskeletal linker protein of the plakin family, also known as bullous pemphigoid antigen 1 (BPAG1), encoded by the DST gene.[1][2][3][4][5] It exists in multiple isoforms due to alternative splicing and alternative transcription initiation, with tissue-specific expression: in neural tissue (DST-a), muscle (DST-b), and epithelial cells (DST-e).[2][3] Dystonin plays essential roles in maintaining the integrity of epithelial tissue by linking keratin intermediate filaments to hemidesmosomes, and in neural and muscular cells by anchoring intermediate filaments to the actin cytoskeleton for axonal health and sarcomere stability.[1][2][3][4] Loss-of-function mutations in DST cause a spectrum of disorders, including neurodegeneration (hereditary sensory and autonomic neuropathy type VI), skin blistering (epidermolysis bullosa simplex, bullous pemphigoid), and myopathies including protein aggregate myopathy and cardiomyopathy.[2][3] Dystonin is not considered a therapeutic receptor, enzyme, transporter, or traditional drug target; its clinical importance derives from genetic disease association, not pharmacologic intervention.[1][2][3][4] If more structured information about drug interactors, biomarkers, or therapeutic development becomes available in the future, this entry should be updated.

Other names

Bullous pemphigoid antigen 1BPAG1BP230BP240DMHDTKIAA0728BPABullous pemphigoid antigenHemidesmosomal plaque proteinDystonia musculorum proteinMACF2Trabeculin-betaFLJ21489FLJ13425FLJ32235FLJ30627CATX-15CATX15D6S1101EBS3EBSB2HSAN6