Hurpin is a selective inhibitor of lysosomal cathepsin L and protects keratinocytes from ultraviolet-induced apoptosis.

Abstract excerpt

Hurpin (headpin/PI13/serpinB13) is an intracellular, differentially spliced member of the serpin superfamily that has been linked to differentiation and apoptosis of human keratinocytes. It is transiently downregulated by UV light and overexpressed in psoriatic skin lesions. Although it has all of the features of an inhibitory serpin, a productive interaction between hurpin and a proteinase has not yet been...

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