CDSN: Important for the epidermal barrier integrity. Defects in CDSN are the cause of hypotrichosis type 2 (HYPT2). A condition characterized by the presence of less than the normal amount of hair. Affected individuals have normal hair in early childhood but experience progressive hair loss limited to the scalp beginning in the middle of the first decade and almost complete baldness by the third decade. Body hair, beard, eyebrows, axillary hair, teeth, and nails develop normally. Defects in CDSN are a cause of peeling skin syndrome (PSS); also known as peeling skin syndrome or deciduous skin or keratolysis exfoliativa congenita. A genodermatosis characterized by generalized, continuous shedding of the outer layers of the epidermis. Two main PSS subtypes have been suggested. Patients with non-inflammatory PSS (type A) manifest white scaling, with painless and easy removal of the skin, irritation when in contact with water, dust and sand, and no history of erythema, pruritis or atopy. Inflammatory PSS (type B) is associated with generalized erythema, pruritus and atopy. It is an ichthyosiform erythroderma characterized by lifelong patchy peeling of the entire skin with onset at birth or shortly after. Several patients have been reported with high IgE levels. CDNS mutations are responsible for generalized, inflammatory peeling skin syndrome type B (PubMed:20691404).
Protein type: Secreted, signal peptide; Cell adhesion; Secreted
Chromosomal Location of Human Ortholog: 6p21.3
Cellular Component: desmosome; cornified envelope; intercellular junction
Molecular Function: protein homodimerization activity
Biological Process: keratinocyte differentiation; epidermis development; cell-cell adhesion; skin morphogenesis; cell adhesion
Disease: Peeling Skin Syndrome 1; Hypotrichosis 2
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