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Screening and Identification of Small Peptides Targeting Fibroblast Growth Factor Receptor2 using a Phage Display Peptide Library
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Screening and Identification of Small Peptides Targeting Fibroblast Growth Factor Receptor2 using a Phage Display Peptide Library

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Biologically active fibroblast growth factor 1 tagged with various epitopes

Masahiro Asada1, Emi Honda, Toru Imamura

  • 1Signaling Molecules Research Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central #6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan. m.asada@aist.go.jp

BMC Research Notes
|August 20, 2008
PubMed
Abstract

Insights

Researchers created tagged human Fibroblast Growth Factor 1 (FGF1) proteins. These tagged FGF1s maintain their heparin binding and mitogenic activity, proving useful for studying FGF1 signaling complexes.

Area of Science:

  • Molecular Biology
  • Cell Signaling
  • Protein Engineering

Background:

  • Fibroblast Growth Factor (FGF) family members regulate diverse biological processes.
  • FGF activity relies on a signaling complex involving FGF, heparin/heparan sulfate, and FGF receptor tyrosine kinase.
  • Understanding the dynamic behavior of FGF signaling complex components is crucial.

Purpose of the Study:

  • To develop tagged versions of human FGF1 for studying its role in signaling complexes.
  • To assess whether C-terminal tags interfere with FGF1's biological activity and interactions.

Main Methods:

  • Expression of biologically active human FGF1 in E. coli with C-terminal tags (myc-(His)6, V5-(His)6, 3xFLAG-(His)6).
  • Assay of heparin-binding affinity for tagged FGF1 variants.
  • Evaluation of mitogenic activity of tagged FGF1s.

Main Results:

  • Tagged FGF1s demonstrated heparin-binding affinities comparable to native FGF1.
  • Mitogenic activity of tagged FGF1s was similar to that of native FGF1.
  • The C-terminal tags did not impede the formation of the ternary complex (FGF1, FGF receptor, heparan sulfate/heparin).

Conclusions:

  • C-terminally tagged FGF1 variants are biologically active and interact appropriately within the signaling complex.
  • These tagged FGF1s are valuable tools for investigating the dynamic behavior of FGF1 in molecular complexes.
  • The findings support the use of tagged FGF1 for further research into FGF signaling pathways.

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