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Related Concept Videos

General Transcription Factors01:30

General Transcription Factors

6.7K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Transcription Factors02:16

Transcription Factors

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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Transcription01:17

Transcription

32.4K
Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
32.4K
Transcription01:10

Transcription

154.8K
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
154.8K
Master Transcription Regulators02:23

Master Transcription Regulators

7.6K
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...
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Master Transcription Regulators02:23

Master Transcription Regulators

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Related Experiment Video

Updated: Jan 9, 2026

Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome
07:23

Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome

Published on: June 15, 2016

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Transcriptomics informed discovery of developmentally essential transcription factors.

Gillian Forbes1,2, Pauline Schaap1

  • 1Division of Molecular Cell and Developmental Biology, School of Life Sciences, University of Dundee, Dundee DD15EH, UK.

Biology Open
|December 2, 2025
PubMed
Summary

Investigating orphan transcription factors (TFs) in Dictyostelia amoebas revealed key roles in development. Four TF knock-outs showed significant defects in slug migration and fruiting body formation, highlighting their importance.

Keywords:
ariAgtaJmybAAmybMAutophagyEvolution of somaLife cycle choiceMorphogenetic movementSocial amoebas

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Area of Science:

  • Cellular and Molecular Biology
  • Developmental Biology
  • Genetics

Background:

  • Transcription factors (TFs) are crucial for cell differentiation but many TFs remain uncharacterized.
  • Model organisms like Dictyostelia amoebas offer insights into TF function during multicellular development.
  • Understanding orphan TFs is essential for a complete picture of gene regulatory networks.

Purpose of the Study:

  • To classify orphan transcription factors (TFs) in Dictyostelia amoebas.
  • To investigate the roles of somatically expressed TFs in multicellular development.
  • To identify TFs involved in regulating cell differentiation and morphogenesis.

Main Methods:

  • Deletion of seven somatically expressed TF genes in Dictyostelia amoebas.
  • Analysis of developmental defects in TF knock-out mutants, including slug migration and fruiting body formation.
  • Transcriptomic analysis and hierarchical clustering to identify gene expression patterns and functional relationships.

Main Results:

  • Four TF knock-outs (ariA-, gtaJ-, mybAA-, mybM-) exhibited distinct developmental defects.
  • mybAA- mutants showed impaired multicellular aggregation and fruiting body development, linked to autophagy genes.
  • mybM- mutants displayed defects in slug migration and fruiting body morphogenesis, despite normal cell-type marker expression.

Conclusions:

  • Transcriptomic data effectively guided the selection of TFs for functional studies.
  • Specific TFs play critical roles in Dictyostelia amoebas' development, influencing migration, morphogenesis, and potentially autophagy.
  • This study advances the functional classification of orphan transcription factors in a model organism.