Video Experimental Relacionado
Updated: Aug 1, 2026
11:27
A Guide to Production, Crystallization, and Structure Determination of Human IKK1/α
Published on: November 2, 2018
La asociación entre la proto-oncoproteína Rel y la proteína de unión a TATA media la activación transcripcional por
L D Kerr1, L J Ransone, P Wamsley
1Molecular Biology and Virology Laboratory, Salk Institute, San Diego, California 92138.
Nature
|September 30, 1993
Resumen
La proteína c-Rel interactúa con la proteína de unión a TATA (TBP) para aumentar la transcripción génica. Esta interacción es crucial, ya que la unión defectuosa de TBP dificulta el proceso, lo que sugiere un vínculo directo entre el potenciador y los factores de transcripción basales.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- La bioquímica es la bioquímica.
Sus antecedentes:
- La proteína c-Rel es un factor de transcripción clave involucrado en la regulación de la expresión génica.
- La proteína de unión a TATA (TBP) es un componente crucial del complejo TFIID, esencial para el inicio de la transcripción basal.
Objetivo del estudio:
- Para investigar la interacción entre c-Rel y TBP.
- Para determinar el significado funcional de esta interacción en la transactivación génica mediada por kappa B.
Principales métodos:
- Ensayos de asociación in vitro e in vivo para estudiar las interacciones de las proteínas.
- Experimentos de coexpresión en células de Drosophila Schneider para evaluar la transactivación.
- Análisis de mutantes de TBP que se unen al ADN para evaluar su impacto en la función c-Rel.
Principales resultados:
- La proteína c-Rel se asocia con TBP tanto in vitro como in vivo.
- La coexpresión de TBP con c-Rel mejora la transactivación desde el sitio kappa B.
- Los mutantes TBP con deficiencia de unión al ADN no solo no cooperan con c-Rel, sino que también reprimen la transactivación mediada por c-Rel.
Conclusiones:
- Existe un vínculo funcional directo entre c-Rel y TBP.
- La interacción entre las proteínas de unión del potenciador de kappa B y los factores de transcripción basales, como TBP, es crítica para mejorar la transcripción.
Más Videos Relacionados
Videos de Conceptos Relacionados
02:16Transcription Factors
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...
02:04Co-activators and Co-repressors
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...
02:26NF-κB-dependent Signaling Pathway
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 heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
01:33Cancer-Critical Genes I: Proto-oncogenes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
02:04Co-activators and Co-repressors
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...
01:33Cancer-Critical Genes I: Proto-oncogenes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...