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Cornulin

Domain

The EF-hand is necessary for the colony survival activity to protect cells from death induced by exposure to DCA.

Function

Promotes cell proliferation, G1/S cell cycle progression and induces expression of the cell cycle regulator CCND1 (PubMed:30009832). Regulates proliferation induced by proinflammatory cytokine response via activation of NFKB1 and PI3K/AKT signaling pathways (PubMed:30009832).

Involvement in disease

Esophageal cancer

ESCR

A malignancy of the esophagus. The most common types are esophageal squamous cell carcinoma and adenocarcinoma. Cancer of the esophagus remains a devastating disease because it is usually not detected until it has progressed to an advanced incurable stage.

None

Disease susceptibility is associated with variants affecting the gene represented in this entry.

CRNN expression is increased in psoriasis patients suggesting a potential role in disease pathogenesis.

Sequence similarities

Belongs to the S100-fused protein family.

Tissue specificity

Expressed in the basal skin layer (at protein level) (PubMed:30009832). Squamous epithelia cell-specific. Expressed in the esophagus (periphery of the cells of the granular and the upper spinous layers), foreskin (granular and lower cornified cells), scalp skin (granular layer), inner root sheath of the hair follicle and in primary keratinocytes (at protein level). Expressed in the squamous epithelium of the cervix, esophagus, foreskin and larynx. Expressed in the fetal bladder and scalp skin. Expressed at very low levels in the lung, kidney, uterus, skeletal muscle, heart and fetal brain. Undetectable or barely detectable in esophageal and oral squamous cell carcinoma compared with the matched adjacent normal esophageal mucosa. Undetectable or barely detectable in larynx and esophagus from patients with pH-documented laryngopharyngeal reflux (LPR).

Cellular localization

  • Cytoplasm
  • Does not colocalize with TGM1.

Alternative names

  • Cornulin
  • 53 kDa putative calcium-binding protein
  • 53 kDa squamous epithelial-induced stress protein
  • 58 kDa heat shock protein
  • Squamous epithelial heat shock protein 53
  • Tumor-related protein
  • CRNN
  • C1orf10
  • SEP53
  • PDRC1
  • DRC1

Target type

Proteins

Molecular weight

53533Da