The epidermal growth factor.
Version of Record online: 2 JAN 2013
© The Author(s) Journal compilation © 1995 International Federation for Cell Biology
Cell Biology International
Volume 19, Issue 5, pages 413–430, May 1995
How to Cite
Boonstra, J., Rijken, P., Humbel, B., Cremers, F., Verkleij, A. and en Henegouwen, P. v. B. (1995), The epidermal growth factor. Cell Biology International, 19: 413–430. doi: 10.1006/cbir.1995.1086
- Issue online: 2 JAN 2013
- Version of Record online: 2 JAN 2013
- Cited By
- Epidermal Growth Factor (EGF);
- Epidermal Growth Factor Receptor (EGFR);
- Tyrosine Kinase (TK);
- Signal transduction;
Epidermal growth factor (EGF) is a single polypeptide of 53 amino acid residues which is involved in the regulation of cell proliferation. Egf exerts its effects in the target cells by binding to the plasma membrane located EGF receptor. The EGF receptor is a transmembrane protein tyrosine kinase. Binding of EGF to the receptor causes activation of the kinase and subsequently receptor autophosphorylation. The autophosphorylation is essential for the interaction of the receptor with its substrates. These bind to the receptor by the so-called SH2 domains.
The signal transduction pathways activated by EGF include the phosphatidylinositol pathway, leading to activation of protein kinase C and to increase in the intracellular Ca2+ concentration, and to the ras pathway leading to MAP kinase activation.
Recently the cytoplasm has been implicated as playing an important role in EGF induced signal transduction. The EGF receptor has been demonstrated to be an actin-binding protein. In addition EGF causes a rapid actin depolymerisation and the formation of membrane ruffles. In particular these membrane ruffles have been shown to act as the first site of signal transduction after EGF binding, and thus may be considered as signal transduction structures. Finally evidence has been presented suggesting a positive role for EGF and/or the receptor in the nucleus.