TEK tyrosine kinase

TEK Tyrosine Kinase is a protein encoded by the TEK gene in humans. It is also known as TIE2, a member of the tyrosine kinase family of proteins. This protein plays a crucial role in angiogenesis and vasculogenesis, the processes by which new blood vessels form from pre-existing ones.

Structure

The TEK Tyrosine Kinase is a receptor tyrosine kinase that contains a epidermal growth factor homology domain and three immunoglobulin-like C2-type domains at the extracellular region. The intracellular region contains two tyrosine kinase domains, indicating its role in signal transduction.

Function

TEK Tyrosine Kinase is predominantly expressed in endothelial cells and is essential for blood vessel maturation, stability, and remodeling. It is activated by binding to angiopoietin ligands, leading to the phosphorylation of tyrosine residues. This activation triggers a series of downstream signaling pathways, including the PI3K/AKT pathway, which promotes cell survival, and the MAPK pathway, which regulates cell proliferation and differentiation.

Clinical Significance

Mutations in the TEK gene are associated with several vascular anomalies, including venous malformations and cutaneomucosal venous malformations. In addition, TEK signaling is implicated in various types of cancers, including colorectal cancer, breast cancer, and lung cancer. Inhibitors of TEK Tyrosine Kinase are being explored as potential therapeutic agents in these diseases.

See Also

• Tyrosine kinase
• Angiogenesis
• Vasculogenesis
• Endothelial cells
• Angiopoietin
• PI3K/AKT pathway
• MAPK pathway
• Venous malformations
• Cutaneomucosal venous malformations
• Colorectal cancer
• Breast cancer
• Lung cancer