Recombinant Human Angiopoietin-2, Biotinylated Protein, CF

R&D Systems | Catalog # BT623B/CF

R&D Systems
Discontinued Product
BT623B/CF has been discontinued. View all Angiopoietin-2 products.

Key Product Details

Source

NS0

Accession Number

O15123

Structure / Form

Oligomer, biotinylated via sugar residues

Conjugate

Biotin

Applications

Bioactivity
View all Angiopoietin-2 Proteins and Enzymes »

Product Specifications

Source

Mouse myeloma cell line, NS0-derived human Angiopoietin-2 protein
Tyr19-Phe496, with a C-terminal 6-his tag

Purity

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis

Tyr19

Predicted Molecular Mass

56 kDa (unlabeled)

Activity

Measured by its ability to activate Tie-2 in C6 rat glial cells transfected with human Tie-2.
0.2 μg/mL of Biotinylated Recombinant Human Angiopoietin-2 significantly induces phosphorylation of human Tie-2.

Formulation, Preparation, and Storage

BT623B/CF
Formulation Lyophilized from a 0.2 μm filtered solution in MOPS, NaCl, CHAPS and PEG with Trehalose.
Reconstitution Reconstitute at 100 μg/mL in PBS.
Shipping The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Calculators

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: Angiopoietin-2

Angiopoietin-2 (Ang-2; also ANGPT2) is a secreted glycoprotein that plays a complex role in angiogenesis and inflammation (1, 2). Mature human Ang-2 is 478 amino acids (aa) in length. It contains one coiled-coil domain (aa 166-248) that mediates multimerization, and a C-terminal fibrinogen-like domain (aa 275-495) that mediates receptor binding. Under reducing conditions, secreted monomeric Ang-2 is 65-66 kDa in size. Under non-reducing conditions, both natural and recombinant Ang-2 form 140 kDa dimers, 200 kDa trimers, and 250-300 kDa tetramers and pentamers (3-5). Alternative splicing generates a short isoform that lacks 52 amino acids (aa) preceding the coiled-coil domain (6). Mature human Ang-2 shares 86% aa sequence identity with mouse and rat Ang-2. Ang-2 is widely expressed during development, but it is restricted postnatally to highly angiogenic tissues such as the placenta, ovaries, and uterus (3). It is particularly abundant in vascular endothelial cells (EC) where it is stored in intracellular Weibel-Palade bodies (1, 3, 7). Both Ang-2 and the related Angiopoietin-1 (Ang-1) are ligands for the receptor tyrosine kinase Tie-2 (2). While Ang-1 is a potent Tie-2 agonist, Ang-2 may act as either a Tie-2 antagonist or agonist, depending upon its state of multimerization. The higher the order of oligomer, the more effective Ang-2 becomes as a Tie-2 agonist (3, 8-11). The short isoform appears to block the binding of either Ang-1 or full-length Ang-2 to Tie-2 (5). Ang-2 functions as a pro-angiogenic factor, although it can also induce EC death and vessel regression (12, 13). Upon its release from quiescent EC, it regulates vascular remodeling by promoting EC survival, proliferation, and migration and destabilizing the interaction between EC and perivascular cells (8, 13, 14). Ang-2 is required for postnatal vascular remodeling, and it cooperates with Ang-1 during lymphatic vessel development (7, 15). It mediates the up-regulation of ICAM-1 and VCAM-1 on EC, which facilitates the adhesion of leukocytes during inflammation (16). Ang-2 is up-regulated in both the endothelium and tumor cells of several cancers as well as in ischemic tissue (17-20). Its direct interaction with Integrins promotes tumor cell invasion (21, 22). Ang-2 also promotes the neuronal differentiation and migration of subventricular zone progenitor cells (20).

References

  1. Augustin, H.G. et al. (2009) Nat. Rev. Mol. Cell Biol. 10:165.
  2. Murdoch, C. et al. (2007) J. Immunol. 178:7405.
  3. Maisonpierre, P.C. et al. (1997) Science 27:55.
  4. Procopio, W.N. et al. (1999) J. Biol. Chem. 274:30196.
  5. Kim, K-T. et al. (2005) J. Biol. Chem. 280:20126.
  6. Kim, I. et al. (2000) J. Biol. Chem. 275:18550.
  7. Gale, N.W. et al. (2002) Dev. Cell 3:411.
  8. Yuan, H.T. et al. (2009) Mol. Cell. Biol. 29:2011.
  9. Falcon, B.L. et al. (2009) Am. J. Pathol. 175:2159.
  10. Kim, H-Z. et al. (2009) Biochim. Biophys. Acta 1793:772.
  11. Kim, I. et al. (2001) Cardiovasc. Res. 49:872.
  12. Lobov, I.B. et al. (2002) Proc. Natl. Acad. Sci. 99:11205.
  13. Cao, Y. et al. (2007) Cancer Res. 67:3835.
  14. Nasarre, P. et al. (2009) Cancer Res. 69:1324.
  15. Dellinger, M. et al. (2008) Dev. Biol. 319:309.
  16. Fiedler, U. et al. (2006) Nat. Med. 12:235.
  17. Koga, K. et al. (2001) Cancer Res. 61:6248.
  18. Etoh, T. et al. (2001) Cancer Res. 61:2145.
  19. Tressel, S.L. et al. (2008) Arterioscler. Thromb. Vasc. Biol. 28:1989.
  20. Liu, X.S. et al. (2009) J. Biol. Chem. 284:22680.
  21. Hu, B. et al. (2006) Cancer Res. 66:775.
  22. Imanishi, Y. et al. (2007) Cancer Res. 67:4254.

Alternate Names

ANGPT2

Entrez Gene IDs

285 (Human); 11601 (Mouse); 89805 (Rat); 396730 (Porcine); 101925495 (Cynomolgus Monkey)

Gene Symbol

ANGPT2

UniProt

O15123

Additional Angiopoietin-2 Products

Product Documents for Recombinant Human Angiopoietin-2, Biotinylated Protein, CF

Certificate of Analysis

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Product Specific Notices for Recombinant Human Angiopoietin-2, Biotinylated Protein, CF

For research use only

Citations for Recombinant Human Angiopoietin-2, Biotinylated Protein, CF

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