Platelet membrane glycoproteins and their function: An overview

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ID: 260665
1970
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Abstract
The membrane glycoproteins (GP) of human platelets act as receptors that mediate two important functions, adhesion to the subendothelial matrix and platelet-platelet cohesion, or aggregation. Many of these glycoprotein receptors exist as noncovalently linked heterodimers, including those that belong to the supergene family of adhesion receptors called the integrins. Human platelets contain at least five members of this integrin family, including a collagen receptor (GP Ia-IIa; α2, β1), a fibronectin receptor (GP Ic-IIa; α5, β1), a laminin receptor (GP Ic′-IIa; α6, β1), a vitronectin receptor (VnR; αv, β3), and a promiscuous, activation-dependent receptor that is thought to be the receptor most responsible for fibrinogen-dependent, platelet-platelet cohesion (GP IIb-IIIa; αIIb, β3). Some, but not all, of the integrins bind to a tripeptide sequence, arginine-glycine-aspartic acid (RGD), on the adhesive proteins. In addition to the integrins, platelets contain other membrane glycoproteins: GP Ib-IX, a receptor for von Willebrand factor, which is thought to be the receptor most responsible for platelet adhesion to the subendothelial matrix in a flowing system; GP V, which may be associated with GP Ib-IX and whose function remains unknown; and GP IV (GP IIIb), which functions as a receptor for thrombospondin and collagen.
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kunicki1970blutplatelet Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Thomas J. Kunicki;Thomas J. Kunicki;
Journal blut
Year 1970
DOI
doi:10.1007/BF00320245
URL
https://link.springer.com/article/10.1007/BF00320245
Keywords
oncology hematology

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