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GenoLensGenoLens

CLDN1

Chr 3q28

claudin 1

Aliases:
SEMP1, ILVASC
MANE:
ENST00000295522.4

Annotations refreshed 1 month ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Cholestasis

    BIALLELIC, autosomal or pseudoautosomal
  • Ichthyosis and erythrokeratoderma

    BIALLELIC, autosomal or pseudoautosomal
  • Neonatal cholestasis

    BIALLELIC, autosomal or pseudoautosomal
  • Ectodermal dysplasia

    BIALLELIC, autosomal or pseudoautosomal
  • Familial cicatricial alopecia

    BIALLELIC, autosomal or pseudoautosomal
  • Palmoplantar keratodermas

    BIALLELIC, autosomal or pseudoautosomal

Disease associations (Open Targets)

  • neonatal ichthyosis-sclerosing cholangitis syndrome

    0.75
  • dengue disease

    0.50
  • neurodegenerative disease

    0.30
  • placental abruption

    0.23
  • hereditary disease

    0.19
  • colorectal carcinoma

    0.11
  • breast carcinoma

    0.11
  • breast cancer

    0.11
  • cancer

    0.11
  • infection

    0.11

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

Claudin-1

Claudins function as major constituents of the tight junction complexes that regulate the permeability of epithelia. While some claudin family members play essential roles in the formation of impermeable barriers, others mediate the permeability to ions and small molecules. Often, several claudin family members are coexpressed and interact with each other, and this determines the overall permeability. CLDN1 is required to prevent the paracellular diffusion of small molecules through tight junctions in the epidermis and is required for the normal barrier function of the skin. Required for normal water homeostasis and to prevent excessive water loss through the skin, probably via an indirect effect on the expression levels of other proteins, since CLDN1 itself seems to be dispensable for water barrier formation in keratinocyte tight junctions (PubMed:23407391)

Curated MONDO disease pages that list CLDN1 among their top associated genes.

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.