FunctionPart of the insoluble cornified cell envelope (CE) of stratified squamous epithelia.
Tissue specificityKeratinocytes of epidermis and other stratified squamous epithelia.
Sequence similaritiesBelongs to the involucrin family.
Post-translational modificationsSubstrate of transglutaminase. Some glutamines and lysines are cross-linked to other involucrin molecules, to other proteins such as keratin, desmoplakin, periplakin and envoplakin, and to lipids like omega-hydroxyceramide.
Cellular localizationCytoplasm. Constituent of the scaffolding of the cornified envelope.