TIE2, also known as TEK tyrosine kinase, TIE2 gene is mapped to 9p21.2. This gene encodes a receptor that belongs to the protein tyrosine kinase Tie2 family. The encoded protein possesses a unique extracellular region that contains two immunoglobulin-like domains, three epidermal growth factor (EGF)-like domains and three fibronectin type III repeats. The ligand angiopoietin-1 binds to this receptor and mediates a signaling pathway that functions in embryonic vascular development. Immunoblotting showed that TIE2 expression was increased by thyroid-stimulating hormone and agents that increased intracellular cAMP. HSCs expressing the receptor tyrosine kinase TIE2 are quiescent and antiapoptotic and comprise a side population of HSCs that adhere to osteoblasts in the bone marrow niche.
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Protein Aliases: Angiopoietin-1 receptor; CD202b; CD202b antigen; EC 2.7.10; EC 126.96.36.199; Endothelial tyrosine kinase; hTIE2; HYK; mTIE2; p140 TEK; STK1; TEK tyrosine kinase, endothelial; TEKT1; Tunica interna endothelial cell kinase; Tyrosine kinase with Ig and EGF homology domains-2; Tyrosine-protein kinase receptor TEK; Tyrosine-protein kinase receptor TIE-2
Gene Aliases: AA517024; CD202B; Hyk; STK1; TEK; TIE-2; TIE2; VMCM; VMCM1
Molecular Function: transmembrane signal receptor