Recombinant Human TGF-beta 1 PLUS, Animal-Free Protein

TGF-beta 1 PLUS activity is determined using the firefly luciferase reporter assay (*) in transiently transfected HEK293T cells. Cells are treated in triplicate with a serial dilution of TGF-beta 1. Firefly luciferase activity is measured and normalized to control Renilla luciferase activity. EC50 = 34.8 pg/ml (1.5 pM). *Promega pGL4.33[luc2P/SRE/Hygro] #E1340

TGF-beta 1 PLUS (Qk010) dimer migrates as a single band at 24 kDa in non-reducing (NR) and 13 kDa as a single monomeric species upon reduction (R). High purity yield of dimeric protein (bioactive form).Purified recombinant protein (7 μg) was resolved using 15% w/v SDS-PAGE in reduced (+ beta -mercaptoethanol, R) and non-reduced conditions (NR) and stained with Coomassie Brilliant Blue R250.

• Reactivity: Hu, Po, Bv
• Applications: Bioactivity
• Format: Carrier-Free

Recombinant Human TGF-beta 1 PLUS, Animal-Free Protein Summary

• Additional Information: Human/Bovine/Porcine
• Details of Functionality: No significant difference between EC₅₀ of reference and test lots
• Source: E. coli-derived TGF-beta 1 protein
• Accession #: P01137.2
• Protein/Peptide Type: Animal-Free Recombinant Proteins
• Endotoxin Note: <0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

• Dilutions:
  • Bioactivity
• Theoretical MW: 24 kDa (dimer).
  Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
• SDS-PAGE: Dimeric TGF- beta 1 PLUS protein only

Packaging, Storage & Formulations

• Storage: Store lyophilized protein between -20 and -80 °C until the date of expiry. Avoid freeze-thaw cycles.
• Buffer: Lyophilized from acetonitrile/TFA
• Reconstitution Instructions: Resuspend in 10mM HCl at >100 µg/ml, prepare single use aliquots, add carrier protein if desired.

Notes

The above product was manufactured, tested and released by R&D System's contract manufacturer, Qkine Ltd, at 1 Murdoch House, Cambridge, UK, CB5 8HW. The product is for research use only and not for the diagnostic or theraputic use.

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human TGF-beta 1 PLUS, Animal-Free Protein

• CEDLAP
• DPD1
• latency-associated peptide
• TGF beta
• TGF beta1
• TGFB
• TGFB1
• TGF-beta 1 protein
• TGFbeta 1
• TGF-beta 1
• TGFbeta
• TGF-beta-1
• transforming growth factor beta-1
• transforming growth factor, beta 1

Background

TGF‑ beta 1 (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‑ beta 1, ‑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‑ beta 1, mice with targeted deletion show defects in hematopoiesis and endothelial differentiation, and die of overwhelming inflammation (2). Human TGF‑ beta 1 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‑ beta 1 (8, 9). Disulfide-linked homodimers of LAP and TGF‑ beta 1 remain non‑covalently associated after secretion, forming the small latent TGF‑ beta 1 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‑ beta 1 shares 100% aa identity with pig, dog and cow TGF‑ beta 1, and 99% aa identity with mouse, rat and horse TGF‑ beta 1. It demonstrates cross‑species activity (1). TGF‑ beta 1 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).

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.

Publications for TGF-beta 1 (Qk010)(1)

Publication using Qk010

• Wang, C;Zhang, Y;Lu, Y;Huang, X;Jiang, H;Chen, G;Shao, Y;Savelkoul, HFJ;Jansen, CA;Liu, G; TGF-?1 impairs IgA class switch recombination and production in porcine Peyer's patches B cells European journal of immunology 2024-07-07 [PMID: 38973082] (Bioassay, Porcine)

Bioinformatics

• Uniprot:
  • P01137.2()