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Updated: May 4, 2026

Generation of Plasmid Vectors Expressing FLAG-tagged Proteins Under the Regulation of Human Elongation Factor-1α Promoter Using Gibson Assembly

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Human transforming growth factor-alpha: precursor structure and expression in E. coli.

R Derynck, A B Roberts, M E Winkler

|August 1, 1984

Summary

This summary is machine-generated.

Researchers identified the transforming growth factor-alpha (TGF-alpha) gene in human tumors. This growth factor binds to the epidermal growth factor receptor, inducing cell transformation and anchorage independence in normal cells.

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Published on: July 21, 2021

Area of Science:

Molecular Biology
Oncology
Cell Biology

Background:

Transforming growth factor-alpha (TGF-alpha) is implicated in human tumor development.
TGF-alpha can induce reversible transformation in non-transformed cell lines.

Purpose of the Study:

To isolate and characterize the gene responsible for TGF-alpha production.
To investigate the functional properties of mature TGF-alpha.

Main Methods:

Used synthetic deoxyoligonucleotides as probes to isolate a TGF-alpha exon from a human genomic DNA library.
Screened a human renal cell carcinoma cell line for TGF-alpha mRNA using the isolated exon.
Cloned TGF-alpha cDNA from the identified cell line and expressed it in E. coli.

Main Results:

Successfully isolated a human TGF-alpha exon and identified a renal cell carcinoma line producing TGF-alpha mRNA.
A cloned TGF-alpha cDNA encoded a 160-amino acid precursor.
The mature 50-amino acid TGF-alpha bound to the epidermal growth factor receptor and induced anchorage independence in normal cells.

Conclusions:

The study successfully isolated and characterized the human TGF-alpha gene and its product.
Mature TGF-alpha plays a significant role in cell transformation and anchorage independence via the epidermal growth factor receptor pathway.