Related Experiment Video
Updated: Apr 18, 2026
Studying the Stoichiometry of Epidermal Growth Factor Receptor in Intact Cells using Correlative Microscopy
Published on: September 11, 2015
A structural perspective on the regulation of the epidermal growth factor receptor
Erika Kovacs1, Julie Anne Zorn, Yongjian Huang
1Departments of 1Molecular and Cell Biology and.
Abstract:
The epidermal growth factor receptor (EGFR) is a receptor tyrosine kinase that plays a critical role in the pathogenesis of many cancers. The structure of intact forms of this receptor has yet to be determined, but intense investigations of fragments of the receptor have provided a detailed view of its activation mechanism, which we review here. Ligand binding converts the receptor to a dimeric form, in which contacts are restricted to the receptor itself, allowing heterodimerization of the four EGFR family members without direct ligand involvement. Activation of the receptor depends on the formation of an asymmetric dimer of kinase domains, in which one kinase domain allosterically activates the other. Coupling between the extracellular and intracellular domains may involve a switch between alternative crossings of the transmembrane helices, which form dimeric structures. We also discuss how receptor regulation is compromised by oncogenic mutations and the structural basis for negative cooperativity in ligand binding.
Insights
The epidermal growth factor receptor (EGFR) structure reveals its cancer-driving activation mechanism. Ligand binding induces dimerization and allosteric activation of kinase domains, crucial for understanding cancer pathogenesis.
Area of Science:
- Biochemistry
- Molecular Biology
- Cancer Research
Background:
- The epidermal growth factor receptor (EGFR) is a key receptor tyrosine kinase implicated in numerous cancers.
- Understanding EGFR's activation mechanism is crucial for developing targeted cancer therapies.
Purpose of the Study:
- To review the current understanding of the EGFR activation mechanism based on fragment investigations.
- To elucidate the structural basis of EGFR dimerization, kinase domain activation, and ligand binding regulation.
Main Methods:
- Review of existing structural and biochemical studies on EGFR fragments.
- Analysis of molecular interactions involved in receptor dimerization and activation.
Main Results:
- Ligand binding induces EGFR dimerization, involving contacts within the receptor itself.
- EGFR activation relies on an asymmetric dimer of kinase domains, with allosteric activation between them.
- Transmembrane helix reorientation may couple extracellular ligand binding to intracellular signaling.
Conclusions:
- The structural insights into EGFR activation provide a foundation for understanding oncogenic mutations.
- Elucidating the mechanism of negative cooperativity in ligand binding offers therapeutic targets.
More Related Videos
15:05Deciphering the Structural Effects of Activating EGFR Somatic Mutations with Molecular Dynamics Simulation
Published on: May 20, 2020
09:32Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
Published on: June 15, 2017
Related Concept Videos
02:38Mitogens and the Cell Cycle
01:15Receptor Downregulation in MVBs
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
01:22Amplifying Signals via Enzymatic Cascade
01:26Receptor Tyrosine Kinases
01:00Enzyme-linked Receptors
01:00Enzyme-linked Receptors
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...