TIE-2 Protein, Human (Biotinylated, sf9, Avi)

TIE-2 is a tyrosine protein kinase that serves as a cell surface receptor for ANGPT1, ANGPT2, and ANGPT4 and exerts a global control over angiogenesis and vascular stability. It regulates endothelial cell survival, proliferation, migration, adhesion, and actin cytoskeletal reorganization. TIE-2 Protein, Human (Biotinylated, sf9, Avi) is the recombinant human-derived TIE-2, expressed by Sf9 insect cells, with Avi labeled tag.

TIE-2, a tyrosine-protein kinase, acts as a cell-surface receptor for ANGPT1, ANGPT2, and ANGPT4, exerting comprehensive control over angiogenesis, endothelial cell behavior, and vascular stability. It regulates diverse processes, including endothelial cell survival, proliferation, migration, adhesion, and actin cytoskeleton reorganization, while also playing a crucial role in maintaining vascular quiescence and preventing the leakage of pro-inflammatory plasma proteins and leukocytes from blood vessels, resulting in anti-inflammatory effects. Essential for normal angiogenesis during embryonic development and post-natal hematopoiesis, TIE-2 exhibits context-dependent angiogenic activation or inhibition after birth. In quiescent vessels, ANGPT1, oligomerizing, recruits TIE-2 to cell-cell contacts, activating phosphatidylinositol 3-kinase and AKT1 signaling cascades, promoting vascular stability. Conversely, in migrating endothelial cells lacking cell-cell adhesions, ANGPT1 recruits TIE-2 to extracellular matrix contacts, stimulating sprouting angiogenesis through focal adhesion complex formation and activation of downstream kinases. ANGPT1 signaling induces receptor dimerization and autophosphorylation, providing binding sites for scaffold proteins and effectors. Modulation by ANGPT2, TIE1 heterodimer formation, and proteolytic processing into a soluble extracellular domain contribute to the intricate regulation of TIE-2 signaling, with the soluble domain acting as a decoy receptor for angiopoietins. TIE-2 phosphorylates DOK2, GRB7, GRB14, PIK3R1, SHC1, and TIE1.

The activity was measured by off-chip mobility shift assay(MSA). The enzyme was incubated with fluorecence-labeled substrate and Mg(or Mn)/ATP. The phosphorylated and unphosphorylated substrates were separated and detected by MSA device. When the protein concentration is 3.125 nM, the conversion rate is about 23%.

Human

Sf9 insect cells

N-Avi

Q02763-1 (Q771-A1124)

7010

Cytoplasmic Domain

Biotin

QLKRANVQRRMAQAFQNVREEPAVQFNSGTLALNRKVKNNPDPTIYPVLDWNDIKFQDVIGEGNFGQVLKARIKKDGLRMDAAIKRMKEYASKDDHRDFAGELEVLCKLGHHPNIINLLGACEHRGYLYLAIEYAPHGNLLDFLRKSRVLETDPAFAIANSTASTLSSQQLLHFAADVARGMDYLSQKQFIHRDLAARNILVGENYVAKIADFGLSRGQEVYVKKTMGRLPVRWMAIESLNYSVYTTNSDVWSYGVLLWEIVSLGGTPYCGMTCAELYEKLPQGYRLEKPLNCDDEVYDLMRQCWREKPYERPSFAQILVSLNRMLEERKTYVNTTLYEKFTYAGIDCSAEEAA

Approximately 43 kDa, based on SDS-PAGE under reducing conditions.

≥ 80%, as determined by reducing SDS-PAGE.

Solution.

Supplied as a 0.22 μm filtered solution of 50 mM HEPES, pH 7.5, 300 mM NaCl, 1 mM DTT, 10% glycerol.

<1 EU/μg, determined by LAL method.

Please use rapid thawing with running water to thaw the protein.

Stored at -80°C for 1 year from date of receipt. It is stable at -20°C for 3 months after opening. It is recommended to freeze aliquots at -80°C for extended storage. Avoid repeated freeze-thaw cycles.

Shipping with dry ice.