Disintegrin

Overview

Structure of a disintegrin heterodimer.

Disintegrins are a family of small, non-enzymatic proteins found in the venom of various snake species. They are known for their ability to inhibit platelet aggregation and integrin-dependent cell adhesion, making them of interest in the study of thrombosis and cancer metastasis.

Structure

Disintegrins are typically composed of 40-100 amino acids and are characterized by the presence of an RGD motif, which is crucial for their binding to integrins. The structure of disintegrins can vary, with some existing as monomers, while others form dimers or even larger complexes. The image to the right shows a typical disintegrin heterodimer.

Function

Disintegrins function primarily by binding to integrins on the surface of cells. Integrins are transmembrane receptors that facilitate cell-extracellular matrix (ECM) adhesion. By binding to integrins, disintegrins can block the interaction between cells and the ECM, thereby inhibiting processes such as platelet aggregation, cell migration, and angiogenesis.

Medical Applications

Due to their ability to inhibit integrin function, disintegrins have potential therapeutic applications in the treatment of diseases such as cancer and cardiovascular diseases. In cancer, disintegrins may prevent metastasis by inhibiting tumor cell adhesion and migration. In cardiovascular diseases, they may reduce the risk of thrombosis by preventing platelet aggregation.

Related Pages

• Integrin
• Platelet aggregation
• Thrombosis
• Cancer metastasis
• Snake venom