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Related Concept Videos

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Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
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Related Experiment Video

Updated: Jun 26, 2025

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
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The mitogen-activated protein kinase network, wired to dynamically function at multiple scales.

Paolo Armando Gagliardi1, Olivier Pertz1

  • 1Institute of Cell Biology, University of Bern, Baltzerstrasse 4, 3012 Bern, Switzerland.

Current Opinion in Cell Biology
|May 16, 2024
PubMed
Summary
This summary is machine-generated.

The mitogen-activated protein kinase (MAPK)/extracellular signal-regulated kinase (ERK) pathway exhibits dynamic behaviors like pulsing and oscillations. Understanding these complex signaling dynamics across multiple scales is crucial for cell fate decisions.

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Area of Science:

  • Cell Biology
  • Molecular Signaling
  • Systems Biology

Background:

  • The mitogen-activated protein kinase (MAPK)/extracellular signal-regulated kinase (ERK) pathway is a critical signaling network.
  • It regulates fundamental cellular processes including cell cycle, survival, and differentiation.
  • Traditional biochemical methods have limitations in capturing pathway dynamics.

Purpose of the Study:

  • To explore the dynamic behaviors of the ERK signaling network.
  • To understand how receptor tyrosine kinases (RTKs) influence ERK dynamics through feedback mechanisms.
  • To investigate the role of ERK dynamics in cell fate decisions at both single-cell and collective levels.

Main Methods:

  • Utilizing advanced fluorescent biosensors to visualize ERK activity in real-time.
  • Employing biochemical assays to analyze feedback mechanisms within the MAPK network.
  • Observing and analyzing collective ERK wave behaviors in cellular systems.

Main Results:

  • Fluorescent biosensors revealed dynamic ERK behaviors like pulsing, oscillations, and amplitude modulation.
  • Specific feedback mechanisms from different RTKs encode distinct ERK dynamics.
  • Collective ERK wave behaviors were observed to coordinate cytoskeletal dynamics and cell fate decisions.

Conclusions:

  • The ERK signaling network exhibits complex, dynamic behaviors essential for cellular functions.
  • Understanding these dynamics requires multi-scale analysis, from molecular interactions to collective cell behaviors.
  • ERK dynamics play a key role in actuating cellular fates through cytoskeletal and transcriptional regulation.