Desmoglein-3 Explained

Desmoglein-3 is a protein that in humans is encoded by the DSG3 gene.[1] [2] In the skin epidermis Desmoglein-3 is expressed in the basal lower layers of the epidermis, and dominates in terms of expression on mucosal surfaces compared to Desmoglein-1.[3]

Function

Desmosomes are cell-cell junctions between epithelial, myocardial, and certain other cell types. Desmoglein 3 is a calcium-binding transmembrane glycoprotein component of desmosomes in vertebrate epithelial cells. Currently, four desmoglein subfamily members have been identified and all are members of the cadherin cell adhesion molecule superfamily. These desmoglein gene family members are located in a cluster on chromosome 18. This protein, along with Desmoglein-1, has been identified as the autoantigen of the autoimmune skin blistering disease pemphigus vulgaris.[4] The mucosal dominant form of pemphigus vulgaris only involves antibodies against Desmoglein-3 and causes mucosal erosions, but no skin lesions. Desmoglein-3 serves as a prognostic marker of Esophageal Squamous Cell Carcinoma (ESCC), and may even be involved in the progression of ESCC.[5]

Pathogenicity

Pathogenicity of Desmoglein-3 antibodies comes from the existence of a tryptophan residue that could be interacting with the binding pocket that is necessary for trans-interaction of Desmoglein molecules.[6] Such antibodies can lead to the cause of skin disorders like pemphigus vulgaris.

Interactions

Desmoglein 3 has been shown to interact with PKP3.[7]

See also

Further reading

Notes and References

  1. Arnemann J, Spurr NK, Buxton RS . The human gene (DSG3) coding for the pemphigus vulgaris antigen is, like the genes coding for the other two known desmogleins, assigned to chromosome 18 . Human Genetics . 89 . 3 . 347–50 . May 1992 . 1601426 . 10.1007/bf00220557 . 30558450 .
  2. Web site: Entrez Gene: DSG3 desmoglein 3 (pemphigus vulgaris antigen).
  3. Book: Beigi, Pooya Khan Mohammad . A Clinician's Guide to Pemphigus Vulgaris. 2018. Springer, Cham. 9783319677583. 3–10. 10.1007/978-3-319-67759-0_1.
  4. Hartlieb E, Kempf B, Partilla M, Vigh B, Spindler V, Waschke J . Desmoglein 2 is less important than desmoglein 3 for keratinocyte cohesion . PLOS ONE . 8 . 1 . e53739 . 2013-01-11 . 23326495 . 3543261 . 10.1371/journal.pone.0053739 . 2013PLoSO...853739H . free .
  5. Fang WK, Gu W, Liao LD, Chen B, Wu ZY, Wu JY, Shen J, Xu LY, Li EM . Prognostic significance of desmoglein 2 and desmoglein 3 in esophageal squamous cell carcinoma . Asian Pacific Journal of Cancer Prevention . 15 . 2 . 871–6 . 2014 . 24568510 . 10.7314/apjcp.2014.15.2.871 . free .
  6. Spindler V, Rötzer V, Dehner C, Kempf B, Gliem M, Radeva M, Hartlieb E, Harms GS, Schmidt E, Waschke J . Peptide-mediated desmoglein 3 crosslinking prevents pemphigus vulgaris autoantibody-induced skin blistering . The Journal of Clinical Investigation . 123 . 2 . 800–11 . February 2013 . 23298835 . 3561799 . 10.1172/jci60139 .
  7. Bonné S, Gilbert B, Hatzfeld M, Chen X, Green KJ, van Roy F . Defining desmosomal plakophilin-3 interactions . The Journal of Cell Biology . 161 . 2 . 403–16 . April 2003 . 12707304 . 2172904 . 10.1083/jcb.200303036 . 1854/LU-210987 .