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Related Concept Videos

General Transcription Factors01:30

General Transcription Factors

5.2K
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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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...
6.9K
RNA Polymerase II Accessory Proteins02:36

RNA Polymerase II Accessory Proteins

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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...
9.1K
Co-activators and Co-repressors02:04

Co-activators and Co-repressors

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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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Combinatorial Gene Control02:33

Combinatorial Gene Control

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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
8.3K

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Identifying Transcription Factor Olig2 Genomic Binding Sites in Acutely Purified PDGFRα+ Cells by Low-cell Chromatin Immunoprecipitation Sequencing Analysis
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Identifying Transcription Factor Olig2 Genomic Binding Sites in Acutely Purified PDGFRα+ Cells by Low-cell Chromatin Immunoprecipitation Sequencing Analysis

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FOXO Transcription Factors: A Brief Overview.

Wolfgang Link1, Bibiana I Ferreira2,3

  • 1Department of Cancer Biology, Sols-Morreale Biomedical Research Institute (IIBM), Spanish National Research Council (CSIC), Universidad Autónoma de Madrid (UAM), Madrid, Spain. walink@iib.uam.es.

Methods in Molecular Biology (Clifton, N.J.)
|November 20, 2024
PubMed
Summary

Forkhead box O (FOXO) transcription factors regulate cellular homeostasis and are implicated in metabolic disorders and cancer. Pharmaceutical strategies aim to restore FOXO activity, offering therapeutic potential.

Keywords:
CancerDaf-16FOXO1FOXO3FOXO4FOXO6LongevityTherapeutic targets

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Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis
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Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis

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Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Genetics

Background:

  • Forkhead box O (FOXO) transcription factors (FOXO1, FOXO3, FOXO4, FOXO6) are key regulators of cellular homeostasis.
  • Initially identified in insulin signaling, FOXOs control energy metabolism, oxidative stress resistance, cell viability, and proliferation.
  • Dysregulation of FOXO proteins is linked to metabolic disorders, longevity, and tumorigenesis.

Purpose of the Study:

  • To summarize the role of FOXO transcription factors in cellular homeostasis.
  • To highlight the involvement of FOXO dysregulation in various diseases.
  • To explore the therapeutic potential of restoring FOXO activity.

Main Methods:

  • Review of existing literature on FOXO transcription factors.
  • Analysis of FOXO's role in cellular processes and disease pathways.
  • Investigation of regulatory mechanisms, including posttranslational modifications.

Main Results:

  • FOXO factors bind to target gene promoters, influencing critical cellular functions.
  • FOXO dysregulation is a significant factor in metabolic diseases and cancer development.
  • Posttranslational modifications are crucial for FOXO regulation, with inactivation often linked to upstream enzyme activity.

Conclusions:

  • Restoring FOXO activity presents a promising therapeutic strategy for various conditions.
  • Understanding FOXO regulation is vital for developing novel pharmaceutical interventions.
  • Targeting FOXO pathways could offer new avenues for treating metabolic disorders and cancer.