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The best-characterized ligand for the three selectins is P-selectin glycoprotein ligand-1 , which is a mucin-type glycoprotein expressed on all white blood cells. Selectins have been implicated in several roles but they are especially important in the immune system by helping white blood cell homing and trafficking.
VCAM-1 is a member of the immunoglobulin superfamily, the superfamily of proteins including antibodies and T-cell receptors.The VCAM-1 gene contains six or seven immunoglobulin domains, and is expressed on both large and small blood vessels only after the endothelial cells are stimulated by cytokines.
Immunofluorescence coloration of actin (green) and the focal adhesion protein vinculin (red) in a fibroblast. Focal adhesions are visible as red dots at the end of the green bundles. In cell biology , focal adhesions (also cell–matrix adhesions or FAs ) are large macromolecular assemblies through which mechanical force and regulatory signals ...
Schematic of cell adhesion. Cell adhesion is the process by which cells interact and attach to neighbouring cells through specialised molecules of the cell surface. This process can occur either through direct contact between cell surfaces such as cell junctions or indirect interaction, where cells attach to surrounding extracellular matrix, a gel-like structure containing molecules released ...
P-selectin is a type-1 transmembrane protein that in humans is encoded by the SELP gene. [5] P-selectin functions as a cell adhesion molecule (CAM) on the surfaces of activated endothelial cells, which line the inner surface of blood vessels, and activated platelets. In unactivated endothelial cells, it is stored in granules called Weibel ...
These short amino acid sequences are the minimum motif of a larger protein that is necessary for binding to a cell surface receptor that drives cell adhesion. [40] The majority (89%) of published studies on biomaterials functionalized with cell adhesive peptides use RGD, whereas IKVAV and YIGSR are used in 6%, and 4% of those studies ...
There are three subsets of selectins: E-selectin (in endothelial cells); L-selectin (in leukocytes); P-selectin (in platelets and endothelial cells); L-selectin is the smallest of the vascular selectins, expressed on all granulocytes and monocytes and on most lymphocytes, can be found in most leukocytes.
A prominent function of the integrins is seen in the molecule GpIIb/IIIa, an integrin on the surface of blood platelets (thrombocytes) responsible for attachment to fibrin within a developing blood clot. This molecule dramatically increases its binding affinity for fibrin/fibrinogen through association of platelets with exposed collagens in the ...