Recombinant Human PlGF-4 Protein

R&D Systems, part of Bio-Techne | Catalog # 8987-PL

R&D Systems, part of Bio-Techne
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Carrier Free
8987-PL-025/CF
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With Carrier
8987-PL-025
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Key Product Details

  • R&D Systems HEK293-derived Recombinant Human PlGF-4 Protein (8987-PL)
  • Quality control testing to verify active proteins with lot specific assays by in-house scientists
  • All R&D Systems proteins are covered with a 100% guarantee

Source

HEK293

Accession #

P49763-4

Structure / Form

Disulfide-linked homodimer

Conjugate

Unconjugated

Applications

Bioactivity

View all PlGF-4 Proteins and Enzymes »

Product Specifications

Source

Human embryonic kidney cell, HEK293-derived human PlGF-4 protein
Leu19-Arg242

Purity

>85%, 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

Leu19

Predicted Molecular Mass

25 kDa

SDS-PAGE

35-40 kDa, reducing conditions

Activity

Measured by its binding ability in a functional ELISA.
When Recombinant Human VEGF R1/Flt‑1 Fc Chimera, aa 27-328 (Catalog # 3516-FL) is immobilized at 0.5 μg/mL, 100 μL/well, the concentration of Recombinant Human PlGF-4 that produces 50% of the optimal binding response is approximately 4-24 ng/mL.

Formulation, Preparation and Storage

Carrier Free
What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

Carrier: 8987-PL
Formulation Lyophilized from a 0.2 μm filtered solution in HCl with BSA as a carrier protein.
Reconstitution Reconstitute at 250 μg/mL in 4 mM HCl.
Shipping The product is shipped at ambient temperature. 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.
Carrier Free: 8987-PL/CF
Formulation Lyophilized from a 0.2 μm filtered solution in HCl.
Reconstitution Reconstitute at 250 μg/mL in 4 mM HCl.
Shipping The product is shipped at ambient temperature. 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.

Background: PlGF-4

Placenta growth factor (PlGF or PGF) is an approximately 55-60 kDa member of the PDGF/VEGF family of secreted growth factors that share a conserved pattern of eight cysteines (1). Alternative splicing generates multiple human PlGF isoforms containing 131 (PlGF‑1), 152 (PlGF‑2), 203 (PlGF‑3), or 224 (PlGF-4) amino acids (aa) (2, 3). Mature human PlGF shares 66% and 63% aa sequence identity with comparable regions of mouse and rat PlGF, respectively. PlGF is expressed as a variably glycosylated disulfide linked homodimer by villous trophoblasts and decidual cells, with smaller amounts in erythroblasts, keratinocytes and some endothelial cells
(3-6). Circulating PlGF increases during pregnancy, reaching a peak in mid‑gestation; this increase is attenuated in preeclampsia (7). Postnatally, mice lacking PlGF show impaired angiogenesis in response to ischemia (8). PlGF binds and signals through VEGF R1/Flt‑1 and Neuropilins (some isoforms), but not VEGF R2/Flk‑1/KDR (8-10). In contrast, VEGF binds both VEGF R1 and R2, but signals mainly through the angiogenic receptor, VEGF R2. PlGF and VEGF therefore compete for binding to VEGF R1, resulting in a PlGF inhibition of VEGF/VEGF R1 binding coupled to a subsequent promotion of VEGF/VEGF R2‑mediated angiogenesis (8, 9). However, PlGF (especially PlGF‑1) and some forms of VEGF can form heterodimers that alter the angiogenic effect of VEGF on VEGF R2 (4, 9). PlGF induces monocyte activation, migration, and production of inflammatory cytokines and VEGF (1). These activities facilitate wound and bone fracture healing and also contribute to inflammation in active sickle cell disease and atherosclerosis (1, 5, 6, 8, 11-13).

References

  1. Dewerchin, M. and P. Carmeliet (2012) Cold Spring Harb. Perspect. Med. 2:a011056.
  2. Cao, Y. et al. (1997) Biochem. Biophys. Res. Commun. 253:493.
  3. Yang, W. et al. (2003) J. Reprod. Immunol. 60:53.
  4. Eriksson, A. et al. (2002) Cancer Cell 1:99.
  5. Oura, H. et al. (2003) Blood 101:560.
  6. Roncal, C. et al. (2010) Cardiovasc. Res. 86:29.
  7. Levine, R.J. et al. (2004) N. Engl. J. Med. 350:672.
  8. Carmeliet, P. et al. (2001) Nat. Med. 7:575.
  9. Autiero, M. et al. (2003) Nat. Med. 9:936.
  10. Migdal, M. et al. (1998) J. Biol. Chem. 273:22272.
  11. Perelman, N. et al. (2003) Blood 102:1506.
  12. Cianfarani, F. et al. (2006) Am. J. Pathol. 169:1167.
  13. Maes, C. et al. (2006) J. Clin. Invest. 116:1230.

Long Name

Placenta Growth Factor 4

Alternate Names

PlGF4

Entrez Gene IDs

5228 (Human)

Gene Symbol

PGF

UniProt

P49763-4

Additional PlGF-4 Products

Product Documents for Recombinant Human PlGF-4 Protein

Product Datasheets

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Download SDS 8987-PL (with carrier)
Download SDS 8987-PL/CF (carrier free)

Product Specific Notices for Recombinant Human PlGF-4 Protein

For research use only

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