ANG-2 Human Active Protein

The protein encoded by this gene is an antagonist of angiopoietin 1 (ANGPT1) and endothelial TEK tyrosine kinase (TIE-2, TEK). The encoded protein disrupts the vascular remodeling ability of ANGPT1 and may induce endothelial cell apoptosis. Three transcript variants encoding three different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ANGPT2: Binds to TEK/TIE2, competing for the ANGPT1 binding site, and modulating ANGPT1 signaling. Can induce tyrosine phosphorylation of TEK/TIE2 in the absence of ANGPT1. In the absence of angiogenic inducers, such as VEGF, ANGPT2-mediated loosening of cell-matrix contacts may induce endothelial cell apoptosis with consequent vascular regression. In concert with VEGF, it may facilitate endothelial cell migration and proliferation, thus serving as a permissive angiogenic signal. Interacts with TEK/TIE2, competing for the same binding site as ANGPT1. 3 isoforms of the human protein are produced by alternative splicing.

Protein type: Secreted, signal peptide; Secreted

Chromosomal Location of Human Ortholog: 8p23.1

Cellular Component: extracellular space; cell projection; extracellular region; plasma membrane; nucleus

Molecular Function: protein binding; metal ion binding; receptor tyrosine kinase binding; receptor binding

Biological Process: Tie receptor signaling pathway; organ regeneration; maternal process involved in pregnancy; signal transduction; negative regulation of blood vessel endothelial cell migration; response to organic cyclic substance; germ cell development; negative regulation of positive chemotaxis; response to radiation; negative regulation of angiogenesis; positive regulation of angiogenesis; response to mechanical stimulus; response to hypoxia; response to glucose stimulus; angiogenesis; response to activity; blood coagulation; leukocyte migration