Periplakin: Proteins and Enzymes

Peroplakin is a component of the cornified envelope of keratinocytes. It may link the cornified envelope to desmosomes and intermediate filaments and may act as a localization signal in PKB/AKT-mediated signaling. [from: http://www.genecards.org/cgi-bin/carddisp.pl®gene=PPL&search=Periplakin] Endogenous periplakin localizes to different cellular compartments, including plasma membrane, intermediate filament structures, the nucleus and mitochondria. Overexpression of the C-terminal part of periplakin, encompassing the PKB binding region, results in predominant intermediate filament localization and little nuclear staining. Periplakin is expressed in epithelial cells, together with envoplakin, the precursor of the epidermal cornified envelope. Furthermore, periplakin has been shown to be a target antigen in paraneoplastic pemphigus, and in keratinocytes it localizes at desmosomes and the interdesmosomal plasma membrane. [from: http://jcs.biologists.org/cgi/content/full/115/20/3957]