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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...
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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
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

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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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NF-κB-dependent Signaling Pathway02:26

NF-κB-dependent Signaling Pathway

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The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The...
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Related Experiment Video

Updated: Jun 20, 2025

Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter
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Transcription factor dependencies identify BAF-dependent cancers.

Helen M McRae1, Diana C Hargreaves1

  • 1Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.

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|July 19, 2024
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Researchers identified cancers reliant on the BAF chromatin remodeling complex. This finding highlights potential new therapies targeting BAF complex inhibitors for multiple myeloma and small cell lung cancer.

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Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter
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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The BAF (BRG1/BRM-associated factor) complex is a crucial chromatin remodeler involved in various cellular processes.
  • Dysregulation of chromatin remodeling complexes, including the BAF complex, is implicated in tumorigenesis.
  • Specific cancer types exhibit unique dependencies on cellular machinery for their growth and survival.

Purpose of the Study:

  • To identify specific cancer types that are critically dependent on the BAF chromatin remodeling complex.
  • To explore the role of transcription factors IRF4 and POU2F3 in BAF complex-dependent cancers.
  • To highlight potential therapeutic strategies targeting the BAF complex in identified cancers.

Main Methods:

  • Analysis of cancer cell lines and patient-derived samples.
  • Genetic and pharmacological manipulation of BAF complex components.
  • Assessment of cellular phenotypes, including proliferation and survival.
  • Identification of key transcription factors driving BAF dependency.

Main Results:

  • Multiple myeloma, particularly IRF4-driven cases, demonstrates a strong dependence on the BAF complex.
  • POU2F3-subtype small cell lung cancer is also identified as BAF complex-dependent.
  • These findings reveal specific vulnerabilities in these cancer types related to BAF complex function.

Conclusions:

  • The BAF chromatin remodeling complex is a critical dependency in specific hematological and lung cancers.
  • Targeting the BAF complex with inhibitors or degraders presents a promising therapeutic avenue for IRF4-driven multiple myeloma and POU2F3-subtype small cell lung cancer.
  • Further research into BAF complex-targeted therapies is warranted for these malignancies.