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RefSeq (mRNA)



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Integrin beta-3 (β3) or CD61 is a protein that in humans is encoded by the ITGB3 gene.[1] CD61 is a cluster of differentiation found on thrombocytes.[2]

Structure and function

The ITGB3 protein product is the integrin beta chain beta 3. Integrins are integral cell-surface proteins composed of an alpha chain and a beta chain. A given chain may combine with multiple partners resulting in different integrins. Integrin beta 3 is found along with the alpha IIb chain in platelets. Integrins are known to participate in cell adhesion as well as cell-surface-mediated signaling.[3]

Role in endometriosis

Defectively expressed β3 integrin subunit has been correlated with presence of endometriosis, and has been suggested as a putative marker of this condition.[4]


CD61 has been shown to interact with PTK2,[5][6] ITGB3BP,[7][8] TLN1[9][10] and CIB1.[11]

See also


  1. Sosnoski DM, Emanuel BS, Hawkins AL, van Tuinen P, Ledbetter DH, Nussbaum RL, Kaos FT, Schwartz E, Phillips D, Bennett JS, et al. (August 1988). "Chromosomal localization of the genes for the vitronectin and fibronectin receptors alpha subunits and for platelet glycoproteins IIb and IIIa". J Clin Invest. 81 (6): 1993–8. doi:10.1172/JCI113548. PMC 442653. PMID 2454952.
  2. Heemskerk, J. W. M.; Mattheij, N. J. A.; Cosemans, J. M. E. M. (2013). "Platelet-based coagulation: different populations, different functions". Journal of Thrombosis and Haemostasis. 11 (1): 2–16. doi:10.1111/jth.12045. ISSN 1538-7933.
  3. "Entrez Gene: ITGB3 integrin, beta 3 (platelet glycoprotein IIIa, antigen CD61)".
  4. May, K. E.; Villar, J.; Kirtley, S.; Kennedy, S. H.; Becker, C. M. (2011). "Endometrial alterations in endometriosis: A systematic review of putative biomarkers". Human Reproduction Update. 17 (5): 637–653. doi:10.1093/humupd/dmr013. PMID 21672902.
  5. Eliceiri, Brian P; Puente Xose S; Hood John D; Stupack Dwayne G; Schlaepfer David D; Huang Xiaozhu Z; Sheppard Dean; Cheresh David A (April 2002). "Src-mediated coupling of focal adhesion kinase to integrin alpha(v)beta5 in vascular endothelial growth factor signaling". J. Cell Biol. United States. 157 (1): 149–60. doi:10.1083/jcb.200109079. ISSN 0021-9525. PMC 2173263. PMID 11927607.
  6. Chung, J; Gao A G; Frazier W A (June 1997). "Thrombspondin acts via integrin-associated protein to activate the platelet integrin alphaIIbbeta3". J. Biol. Chem. UNITED STATES. 272 (23): 14740–6. doi:10.1074/jbc.272.23.14740. ISSN 0021-9258. PMID 9169439.
  7. Fujimoto, Tetsuro-Takahiro; Katsutani Shinya; Shimomura Takeshi; Fujimura Kingo (January 2002). "Novel alternatively spliced form of beta(3)-endonexin". Thromb. Res. United States. 105 (1): 63–70. doi:10.1016/S0049-3848(01)00405-4. ISSN 0049-3848. PMID 11864709.
  8. Shattil, S J; O'Toole T; Eigenthaler M; Thon V; Williams M; Babior B M; Ginsberg M H (November 1995). "Beta 3-endonexin, a novel polypeptide that interacts specifically with the cytoplasmic tail of the integrin beta 3 subunit". J. Cell Biol. UNITED STATES. 131 (3): 807–16. doi:10.1083/jcb.131.3.807. ISSN 0021-9525. PMC 2120613. PMID 7593198.
  9. Patil, S; Jedsadayanmata A; Wencel-Drake J D; Wang W; Knezevic I; Lam S C (October 1999). "Identification of a talin-binding site in the integrin beta(3) subunit distinct from the NPLY regulatory motif of post-ligand binding functions. The talin n-terminal head domain interacts with the membrane-proximal region of the beta(3) cytoplasmic tail". J. Biol. Chem. UNITED STATES. 274 (40): 28575–83. doi:10.1074/jbc.274.40.28575. ISSN 0021-9258. PMID 10497223.
  10. Calderwood, David A; Yan Boxu; de Pereda Jose M; Alvarez Begoña García; Fujioka Yosuke; Liddington Robert C; Ginsberg Mark H (June 2002). "The phosphotyrosine binding-like domain of talin activates integrins". J. Biol. Chem. United States. 277 (24): 21749–58. doi:10.1074/jbc.M111996200. ISSN 0021-9258. PMID 11932255.
  11. Naik, U P; Patel P M; Parise L V (February 1997). "Identification of a novel calcium-binding protein that interacts with the integrin alphaIIb cytoplasmic domain". J. Biol. Chem. UNITED STATES. 272 (8): 4651–4. doi:10.1074/jbc.272.8.4651. ISSN 0021-9258. PMID 9030514.

Further reading

External links