Characterization of recombinant soluble human transforming growth factor-beta receptor type II (rhTGF-beta sRII)

Cytokine. 1995 Jul;7(5):389-97. doi: 10.1006/cyto.1995.0054.


Recombinant human transforming growth factor soluble receptor Type II (rhTGF-beta sRII) corresponding to the 159 amino acid extracellular domain of hTGF-beta RII has been expressed in insect cells using the baculovirus expression system or in a mouse myeloma cell line. N-terminal sequence analysis of the purified protein revealed the removal of the 23 amino acid signal peptide. In SDS-PAGE, the rhTGF-beta sRII resolves into multiple bands due to N-linked glycosylation. Recombinant hTGF-beta sRII is a TGF-beta antagonist and will inhibit the biological activities of TGF-beta 1, TGF-beta 3, and TGF-beta 5 on TGF-beta-responsive cell lines, such as murine HT-2 or human TF-1 with an ED50 of approximately 0.3 micrograms/mL. However, hTGF-beta sRII does not inhibit TGF-beta 2 bioactivities in these cell lines, suggesting that hTGF-beta RII has low affinity for TGF-beta 2. Polyclonal antibodies to hTGF-beta sRII have been produced in goats and purified on Protein-G affinity columns. This antibody can inhibit TGF-beta 1,2,3,5-dependent bioactivities on human cell lines such as TF-1. Additionally, this antibody has species cross-reactivity and will also inhibit TGF-beta-dependent bioactivities on murine cells.(ABSTRACT TRUNCATED AT 250 WORDS)

MeSH terms

  • Animals
  • Antibody Specificity
  • Baculoviridae / genetics*
  • Base Sequence
  • Cells, Cultured
  • Cloning, Molecular / methods*
  • Enzyme-Linked Immunosorbent Assay
  • Genetic Vectors*
  • Humans
  • Insecta
  • Mice
  • Mink
  • Molecular Sequence Data
  • Receptors, Transforming Growth Factor beta / biosynthesis
  • Receptors, Transforming Growth Factor beta / chemistry*
  • Receptors, Transforming Growth Factor beta / genetics
  • Recombinant Proteins / biosynthesis
  • Recombinant Proteins / chemistry
  • Sensitivity and Specificity
  • Solubility
  • Transforming Growth Factor beta / antagonists & inhibitors


  • Receptors, Transforming Growth Factor beta
  • Recombinant Proteins
  • Transforming Growth Factor beta