TEK tyrosine kinase explained

Angiopoietin-1 receptor also known as CD202B (cluster of differentiation 202B) is a protein that in humans is encoded by the TEK gene.[1] [2] Also known as TIE2, it is an angiopoietin receptor.

Function

The TEK receptor tyrosine kinase is expressed almost exclusively in endothelial cells in mice, rats, and humans. (TEK is closely related to the TIE receptor tyrosine kinase.)[3]

This receptor possesses a unique extracellular domain containing 2 immunoglobulin-like loops separated by 3 epidermal growth factor-like repeats that are connected to 3 fibronectin type III-like repeats.[4] The ligand for the receptor is angiopoietin-1.[3] TEK has also been suggested as a marker for nucleus pulposus progenitor cells, from the intervertebral disc, which upon activation by Angiopoietin-1 starts to multiply and differentiate.[5] [6]

Defects in TEK are associated with inherited venous malformations; the TEK signaling pathway appears to be critical for endothelial cell-smooth muscle cell communication in venous morphogenesis.[3]

In cancer patients, TEK (Tie2) is expressed in a subpopulation of monocytes that home in on the tumor and are essential for the formation of new blood vessels there.[7]

Interactions

TEK tyrosine kinase has been shown to interact with:

See also

References

Further reading

External links

Notes and References

  1. Partanen J, Armstrong E, Mäkelä TP, Korhonen J, Sandberg M, Renkonen R, Knuutila S, Huebner K, Alitalo K . A novel endothelial cell surface receptor tyrosine kinase with extracellular epidermal growth factor homology domains . Molecular and Cellular Biology . 12 . 4 . 1698–707 . April 1992 . 1312667 . 369613 . 10.1128/mcb.12.4.1698.
  2. Boon LM, Mulliken JB, Vikkula M, Watkins H, Seidman J, Olsen BR, Warman ML . Assignment of a locus for dominantly inherited venous malformations to chromosome 9p . Human Molecular Genetics . 3 . 9 . 1583–7 . September 1994 . 7833915 . 10.1093/hmg/3.9.1583 .
  3. Web site: Entrez Gene: TEK TEK tyrosine kinase, endothelial (venous malformations, multiple cutaneous and mucosal).
  4. Fiedler U, Krissl T, Koidl S, Weiss C, Koblizek T, Deutsch U, Martiny-Baron G, Marmé D, Augustin HG . 6 . Angiopoietin-1 and angiopoietin-2 share the same binding domains in the Tie-2 receptor involving the first Ig-like loop and the epidermal growth factor-like repeats . The Journal of Biological Chemistry . 278 . 3 . 1721–7 . January 2003 . 12427764 . 10.1074/jbc.M208550200 . free .
  5. Sakai D, Nakamura Y, Nakai T, Mishima T, Kato S, Grad S, Alini M, Risbud MV, Chan D, Cheah KS, Yamamura K, Masuda K, Okano H, Ando K, Mochida J . 6 . Exhaustion of nucleus pulposus progenitor cells with ageing and degeneration of the intervertebral disc . Nature Communications . 3 . 1264 . 2012 . 23232394 . 3535337 . 10.1038/ncomms2226 . 2012NatCo...3.1264S .
  6. Sakai D, Schol J, Bach FC, Tekari A, Sagawa N, Nakamura Y, Chan SC, Nakai T, Creemers LB, Frauchiger DA, May RD, Grad S, Watanabe M, Tryfonidou MA, Gantenbein B . 6 . Successful fishing for nucleus pulposus progenitor cells of the intervertebral disc across species . JOR Spine . 1 . 2 . e1018 . June 2018 . 31463445 . 6686801 . 10.1002/jsp2.1018 . free .
  7. Venneri MA, De Palma M, Ponzoni M, Pucci F, Scielzo C, Zonari E, Mazzieri R, Doglioni C, Naldini L . 6 . Identification of proangiogenic TIE2-expressing monocytes (TEMs) in human peripheral blood and cancer . Blood . 109 . 12 . 5276–85 . June 2007 . 17327411 . 10.1182/blood-2006-10-053504 . 13999825 . free .
  8. Sato A, Iwama A, Takakura N, Nishio H, Yancopoulos GD, Suda T . Characterization of TEK receptor tyrosine kinase and its ligands, Angiopoietins, in human hematopoietic progenitor cells . International Immunology . 10 . 8 . 1217–27 . August 1998 . 9723709 . 10.1093/intimm/10.8.1217 . free .
  9. Maisonpierre PC, Suri C, Jones PF, Bartunkova S, Wiegand SJ, Radziejewski C, Compton D, McClain J, Aldrich TH, Papadopoulos N, Daly TJ, Davis S, Sato TN, Yancopoulos GD . Angiopoietin-2, a natural antagonist for Tie2 that disrupts in vivo angiogenesis . Science . 277 . 5322 . 55–60 . July 1997 . 9204896 . 10.1126/science.277.5322.55 .
  10. Davis S, Aldrich TH, Jones PF, Acheson A, Compton DL, Jain V, Ryan TE, Bruno J, Radziejewski C, Maisonpierre PC, Yancopoulos GD . Isolation of angiopoietin-1, a ligand for the TIE2 receptor, by secretion-trap expression cloning . Cell . 87 . 7 . 1161–9 . December 1996 . 8980223 . 10.1016/s0092-8674(00)81812-7 . free .
  11. Jones N, Dumont DJ . The Tek/Tie2 receptor signals through a novel Dok-related docking protein, Dok-R . Oncogene . 17 . 9 . 1097–108 . September 1998 . 9764820 . 10.1038/sj.onc.1202115 . 20187169 .
  12. Master Z, Jones N, Tran J, Jones J, Kerbel RS, Dumont DJ . Dok-R plays a pivotal role in angiopoietin-1-dependent cell migration through recruitment and activation of Pak . The EMBO Journal . 20 . 21 . 5919–28 . November 2001 . 11689432 . 125712 . 10.1093/emboj/20.21.5919 .