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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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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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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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Related Experiment Video

Updated: Mar 16, 2026

An Optimized Protocol for Electrophoretic Mobility Shift Assay Using Infrared Fluorescent Dye-labeled Oligonucleotides
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Sox2: A multitasking networker.

Simone Reiprich1, Michael Wegner1

  • 1Institut für Biochemie; Emil-Fischer-Zentrum; Friedrich-Alexander-Universität Erlangen-Nürnberg ; Erlangen, Germany.

Neurogenesis (Austin, Tex.)
|August 10, 2016
PubMed
Summary

The transcription factor Sox2, typically a pluripotency factor, surprisingly acts as a differentiation factor in central nervous system (CNS) myelin-forming cell development by modulating microRNA levels.

Area of Science:

  • Developmental biology
  • Stem cell biology
  • Neuroscience

Background:

  • Sox2 is a well-established pluripotency factor in stem and precursor cells, typically associated with maintaining an undifferentiated state.
  • Its known functions include roles as a classical transcription factor, influencing histone modifications and chromatin structure.
  • Previous research has primarily linked Sox2 to maintaining pluripotency and early developmental processes.

Discussion:

  • This study presents the first detailed analysis of Sox2 expression and function during oligodendrocyte development, the cells responsible for myelin formation in the CNS.
  • Contrary to its established role, Sox2 was found to promote differentiation rather than pluripotency in this context.
  • The mechanism involves Sox2 modulating microRNA levels, suggesting a novel pathway for its function.
Keywords:
Sox proteinmicroRNAoligodendrocytepre-patterningtranscription factor

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Key Insights:

  • Sox2 functions as a differentiation factor in oligodendrocyte development, a novel role expanding its known repertoire.
  • Sox2's differentiation-promoting activity is mediated through the regulation of microRNA levels.
  • This finding challenges the traditional view of Sox2 solely as a pluripotency-maintaining factor.

Outlook:

  • Further investigation into Sox2's role in other cell differentiation processes within the CNS.
  • Exploring the specific microRNAs regulated by Sox2 and their downstream targets in oligodendrocyte differentiation.
  • Understanding the broader implications of Sox2's multitasking regulatory activities in developmental contexts.