Plakophilin 1 (19F10) Mouse Monoclonal Antibody #33648

Plakophilin 1 (PKP1), a member of the armadillo repeat protein family, is a desmosomal plaque protein predominantly expressed in the suprabasal layers of stratified and complex epithelia, where it plays a central role in maintaining intercellular adhesion and epithelial integrity in tissues frequently exposed to mechanical stress (1). Plakophilin 1 plays a role in modulating several key signaling pathways, including MAPK, Wnt, Akt, and cytoskeletal (2). Plakophilin 1 has a dual role in cancer, functioning as either a tumor suppressor or an oncogene depending on its subcellular localization. When membrane-bound, it stabilizes cell-cell adhesion and may suppress cellular invasion; however, when localized to the cytoplasm or nucleus, it drives oncogenesis by promoting MYC translation and modulating metabolic and DNA damage responses (2,3). PKP1 mutation disrupts desmosomal integrity, causing ectodermal dysplasia-skin fragility syndrome, a rare autosomal recessive disorder characterized by epidermal fragility and abnormal hair and nail growth (4). Due to its diverse biological functions and disease-associated expression patterns, plakophilin 1 is under investigation as both a potential biomarker and therapeutic target.