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Related Concept Videos

Master Transcription Regulators02:23

Master Transcription Regulators

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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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Pleiotropy01:33

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Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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General Transcription Factors01:30

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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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Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
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Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
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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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Related Experiment Video

Updated: Sep 4, 2025

An Optimized Protocol for Electrophoretic Mobility Shift Assay Using Infrared Fluorescent Dye-labeled Oligonucleotides
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SOX2 transcription factor binding and function.

Daniel W Hagey1, Maria Bergsland2, Jonas Muhr2

  • 1Department of Laboratory Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden.

Development (Cambridge, England)
|July 21, 2022
PubMed
Summary

SOX2 is a key transcription factor essential for stem cell functions. It acts as a pioneer factor, regulating gene accessibility and cell fate decisions in a context-dependent manner.

Keywords:
ChIP-seqChromatin bindingPioneer factorSOX2Stem cell regulation

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Area of Science:

  • Stem cell biology
  • Molecular biology
  • Epigenetics

Background:

  • SOX2 (SRY-box 2) is a crucial transcription factor for stem cell maintenance and differentiation.
  • It plays a vital role in regulating cell proliferation and lineage decisions across various tissues.
  • Recent research highlights SOX2's function as a pioneer factor in chromatin remodeling.

Purpose of the Study:

  • To review recent findings on SOX2's role in stem cell regulation.
  • To elucidate the mechanisms by which SOX2 controls stemness and differentiation.
  • To explain the context-dependent nature of SOX2's functions.

Main Methods:

  • Review of recent scientific literature and studies on SOX2.
  • Analysis of SOX2's molecular functions, including its pioneer factor activity.
  • Examination of cell type-specific regulatory mechanisms involving SOX2.

Main Results:

  • SOX2 targets nucleosomal DNA, modulates chromatin accessibility, and primes genes for activation.
  • SOX2's diverse functions are achieved through context-dependent interactions and expression levels.
  • Despite binding similar DNA motifs, SOX2 exhibits cell type-specific regulatory roles.

Conclusions:

  • SOX2 is a master regulator of stem cell activity, essential for maintaining pluripotency and directing differentiation.
  • Its pioneer factor function is critical for controlling gene expression landscapes in stem cells.
  • Understanding SOX2's context-dependent regulation is key to harnessing its potential in regenerative medicine.