Arginyl-glycyl-aspartic acid (RGD): a cell adhesion motif.

The tripeptide Arg-Gly-Asp (RGD) was originally identified as the sequence within fibronectin that mediates cell attachment. The RGD motif has now been found in numerous other proteins and supports cell adhesion in many, but not all, of these. The integrins, a family of cell-surface proteins, act as receptors for cell adhesion molecules. A subset of the integrins recognize the RGD motif within their ligands, the binding of which mediates both cell-substratum and cell-cell interactions. RGD peptides and mimetics, in addition to providing insights into the fundamental mechanisms of cell adhesion, are potential therapeutic agents for the treatment of diseases such as thrombosis and cancer.

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