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Related Concept Videos

Master Transcription Regulators02:23

Master Transcription Regulators

Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
Formation of Muscle Fibers from Myoblasts01:13

Formation of Muscle Fibers from Myoblasts

De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription factors...
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

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: May 10, 2026

Identification of MyoD Interactome Using Tandem Affinity Purification Coupled to Mass Spectrometry
14:47

Identification of MyoD Interactome Using Tandem Affinity Purification Coupled to Mass Spectrometry

Published on: May 17, 2016

Dial M(RF) for myogenesis.

Natalia Moncaut1, Peter W J Rigby, Jaime J Carvajal

  • 1Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK

The FEBS Journal
|June 12, 2013
PubMed
Summary
This summary is machine-generated.

The core of skeletal muscle development involves four myogenic regulatory factors (MRFs) that bind to DNA. Genome-wide studies reveal how these factors control muscle cell differentiation and the roles of micro-RNAs.

Keywords:
GRNsMRFMrf4Myf5MyoDMyoGmiRNAmouse embryomyogenesismyogenic regulatory factor

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Last Updated: May 10, 2026

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Chromatin Immunoprecipitation Assay for Tissue-specific Genes using Early-stage Mouse Embryos

Published on: April 29, 2011

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Skeletal muscle cell determination and differentiation are controlled by a transcriptional regulatory network.
  • The network's core consists of four myogenic regulatory factors (MRFs): Myf5, MyoD, Mrf4, and MyoG.
  • These transcription factors form heterodimers with E proteins to bind the E-box sequence (CANNTG).

Purpose of the Study:

  • To elucidate the transcriptional regulatory network controlling skeletal muscle development.
  • To understand how upstream activators differ across embryonic progenitor populations.
  • To investigate the role of genome-wide approaches in understanding MRF function and micro-RNA regulation.

Main Methods:

  • Review of existing literature on transcriptional regulation in skeletal muscle.
  • Analysis of genome-wide approaches to study MRF function.
  • Consideration of micro-RNA roles in regulating developmental pathways.

Main Results:

  • MRFs, as heterodimers with E proteins, bind to E-box sequences to control gene expression.
  • Upstream activators of the myogenic cascade vary among different embryonic skeletal muscle progenitor populations.
  • Genome-wide data provide mechanistic insights into MRF-mediated terminal differentiation.
  • Micro-RNAs play emerging roles in regulating both upstream activators and differentiation genes.

Conclusions:

  • The transcriptional network governing skeletal muscle development is complex, involving MRFs and E proteins.
  • Diverse inductive signals initiate and maintain transcription via varied upstream activators.
  • Genome-wide studies and micro-RNA research are crucial for a comprehensive understanding of muscle differentiation.