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Updated: Jul 4, 2026

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Published on: June 15, 2017

MSK activation and physiological roles.

J Simon C Arthur¹

¹MRC Protein Phosphorylation Unit, College of Life Sciences, University of Dundee, Dundee, DD1 5EH, UK. j.s.c.arthur@dundee.ac.uk

Frontiers in Bioscience : a Journal and Virtual Library

|May 30, 2008

Summary

This summary is machine-generated.

Mitogen and stress activated protein kinases (MSKs) regulate gene expression by phosphorylating key substrates. MSK knockout studies reveal their critical role in immediate early gene transcription and suggest involvement in synaptic plasticity and immune responses.

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Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

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Published on: January 20, 2012

Area of Science:

Molecular Biology
Cellular Signaling
Biochemistry

Background:

Mitogen and stress activated protein kinases (MSKs) are nuclear serine/threonine kinases.
MSKs are activated downstream of ERK1/2 or p38 MAPK cascades.
They possess dual kinase domains: an N-terminal AGC-related domain and a C-terminal CaMK-related domain.

Purpose of the Study:

To elucidate the activation mechanism and substrate specificity of MSKs.
To investigate the role of MSKs in gene regulation, particularly immediate early genes.
To explore the physiological functions of MSKs in cellular processes.

Main Methods:

Activation of MSKs via upstream MAPK pathways.
Analysis of MSK phosphorylation activity and substrate interactions.
Assessment of gene transcription in MSK knockout models.

Main Results:

MSK activation involves C-terminal domain phosphorylation by MAPKs, leading to N-terminal domain activation.
MSKs phosphorylate substrates like CREB, NFkB, HMGN1, and histone H3.
MSK deficiency impairs transcription of CRE-dependent immediate early genes.

Conclusions:

MSKs are crucial regulators of immediate early gene expression.
Further research indicates potential roles for MSKs in neuronal synaptic plasticity and innate immunity.