Recombinant Human TGF-beta 1 (CHO-Expressed) Protein, CF Best Seller

R&D Systems, part of Bio-Techne | Catalog # 11409-BH

R&D Systems, part of Bio-Techne
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11409-BH-500
11409-BH-100
11409-BH-050
11409-BH-01M
11409-BH-010
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Key Product Details

Source

CHO

Accession #

P01137.2

Structure / Form

Disulfide-linked homodimer

Conjugate

Unconjugated

Applications

Bioactivity

View all TGF-beta 1 Proteins and Enzymes »

Product Specifications

Source

Chinese Hamster Ovary cell line, CHO-derived human TGF-beta 1 protein
Ala279-Ser390

Purity

>97%, 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

Ala279

Predicted Molecular Mass

13 kDa

SDS-PAGE

12 kDa, under reducing conditions & 24 kDa under non-reducing conditions.

Activity

Measured by its ability to inhibit the IL-4-dependent proliferation of HT-2 mouse T cells. Tsang, M. et al. (1995) Cytokine 7:389.
The ED50 for this effect is 0.025-0.200 ng/mL.

Scientific Data Images for Recombinant Human TGF-beta 1 (CHO-Expressed) Protein, CF

Recombinant Human TGF‑ beta1 (CHO-Expressed) Protein Bioactivity.

Recombinant Human TGF‑ beta1 (CHO-Expressed) (Catalog # 11409-BH) inhibits recombinant mouse IL-4 induced proliferation in the HT-2 mouse T cell line. The ED50 for this effect is 0.025-0.200 ng/mL.

Recombinant Human TGF‑ beta1 (CHO-Expressed) Protein SDS-PAGE.

2 μg/lane of Recombinant Human TGF‑ beta1 (CHO-Expressed) Protein (Catalog # 11409-BH) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 12 kDa, under reducing conditions & 24 kDa under non-reducing conditions.

Formulation, Preparation and Storage

11409-BH
Formulation Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA with Trehalose.
Reconstitution

Reconstitute the 10 μg size at 100 μg/mL in 4mM HCl. Reconstitute all other sizes at 250 μg/mL in 4mM 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: TGF-beta 1

TGF‑ beta1 (transforming growth factor beta 1) is one of three closely related mammalian members of the large TGF‑ beta superfamily that share a characteristic cystine knot structure (1‑7). TGF‑ beta1, ‑2 and ‑3 are highly pleiotropic cytokines that are proposed to act as cellular switches that regulate processes such as immune function, proliferation and epithelial‑mesenchymal transition (1‑4). Each TGF‑ beta isoform has some non‑redundant functions; for TGF‑ beta1, mice with targeted deletion show defects in hematopoiesis and endothelial differentiation, and die of overwhelming inflammation (2). Human TGF‑ beta1 cDNA encodes a 390 amino acid (aa) precursor that contains a 29 aa signal peptide and a 361 aa proprotein (8). A furin-like convertase processes the proprotein to generate an N‑terminal 249 aa latency‑associated peptide (LAP) and a C‑terminal 112 aa mature TGF‑ beta1 (8, 9). Disulfide-linked homodimers of LAP and TGF‑ beta1 remain non‑covalently associated after secretion, forming the small latent TGF‑ beta1 complex (8‑10). Covalent linkage of LAP to one of three latent TGF‑ beta binding proteins (LTBPs) creates a large latent complex that may interact with the extracellular matrix (9, 10). TGF‑ beta is activated from latency by pathways that include actions of the protease plasmin, matrix metalloproteases, thrombospondin 1 and a subset of integrins (10). Mature human TGF‑ beta1 shares 100% aa identity with pig, dog and cow TGF‑ beta1, and 99% aa identity with mouse, rat and horse TGF‑ beta1. It demonstrates cross‑species activity (1). TGF‑ beta1 signaling begins with high‑affinity binding to a type II ser/thr kinase receptor termed TGF‑ beta RII. This receptor then phosphorylates and activates a second ser/thr kinase receptor, TGF‑ beta RI (also called activin receptor‑like kinase (ALK) ‑5), or alternatively, ALK‑1. This complex phosphorylates and activates Smad proteins that regulate transcription (3, 11, 12). Contributions of the accessory receptors betaglycan (also known as TGF‑ beta RIII) and endoglin, or use of Smad-independent signaling pathways, allow for disparate actions observed in response to TGF‑ beta in different contexts (11).

References

  1. Derynck, R. and K. Miyazono (2008) Cold Spring Harbor Laboratory Press p. 29.
  2. Dunker, N. and K. Krieglstein (2000) Eur. J. Biochem. 267:6982.
  3. Wahl, S.M. (2006) Immunol. Rev. 213:213.
  4. Chang, H. et al. (2002) Endocr. Rev. 23:787.
  5. Lin, J.S. et al. (2006) Reproduction 132:179.
  6. Hinck, A.P. et al. (1996) Biochemistry 35:8517.
  7. Mittl, P.R.E. et al. (1996) Protein Sci. 5:1261.
  8. Derynck, R. et al. (1985) Nature 316:701.
  9. Miyazono, K. et al. (1988) J. Biol. Chem. 263:6407.
  10. Oklu, R. and R. Hesketh (2000) Biochem. J. 352:601.
  11. de Caestecker, M. et al. (2004) Cytokine Growth Factor Rev. 15:1.
  12. Zuniga, J.E. et al. (2005) J. Mol. Biol. 354:1052.

Long Name

Transforming Growth Factor beta 1

Alternate Names

TGF beta1, TGFB, TGFB1, TGFbeta 1

Entrez Gene IDs

7040 (Human); 21803 (Mouse); 59086 (Rat); 397078 (Porcine); 100033900 (Equine)

Gene Symbol

TGFB1

UniProt

P01137.2

Additional TGF-beta 1 Products

Product Documents for Recombinant Human TGF-beta 1 (CHO-Expressed) Protein, CF

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Product Specific Notices for Recombinant Human TGF-beta 1 (CHO-Expressed) Protein, CF

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