Video Experimental Relacionado
Updated: Aug 18, 2026
10:09
Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence
Published on: January 7, 2019
Interacción directa entre las oncoproteínas nucleares fos y jun: papel del dominio de la "cerradura de la leucina"
P Sassone-Corsi1, L J Ransone, W W Lamph
1Molecular Biology and Virology Laboratory, Salk Institute, San Diego, California 92138.
Nature
|December 15, 1988
Resumen
La proteína fos modula directamente la función de la proteína jun formando un heterodimero. Este complejo utiliza el fos fos.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- La bioquímica es la bioquímica.
Sus antecedentes:
- La regulación de la expresión génica implica interacciones de proteínas nucleares con secuencias genómicas.
- Los factores y moduladores de transcripción controlan la activación o represión de los genes.
- Los productos proto-oncogénicos como jun (AP-1), fos y myc están implicados en la regulación transcripcional.
Objetivo del estudio:
- Para investigar la interacción funcional entre las proteínas fos y jun.
- Para dilucidar el mecanismo por el cual fos modula la función de jun.
- Identificar los dominios de fos responsables de la unión al ADN y la regulación de la transcripción.
Principales métodos:
- Los ensayos de coinmunoprecipitación estudian la asociación de las proteínas.
- Análisis de los dominios de proteínas para determinar las funciones funcionales.
- Estudios sobre la formación de heterodimeros entre las proteínas fos y jun.
Principales resultados:
- La proteína fos modula directamente la función jun a través de un heterodímero fos-jun.
- El dominio fos 'cerradura de leucina' es esencial para la unión al ADN del heterodimero.
- Un dominio C-terminal distinto de la proteína fos media la regulación transcripcional.
Conclusiones:
- Las proteínas Fos y Jun forman un heterodímero funcional que regula la expresión génica.
- Los dominios específicos dentro de la proteína fos son críticos para la unión al ADN y el control de la transcripción.
- Este estudio aclara el mecanismo de la transregulación transcripcional por los proto-oncogenes fos y jun.
Más Videos Relacionados
Videos de Conceptos Relacionados
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...
02:42Eukaryotic Transcription Activators
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These domains are...
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These domains are...
01:45Regulation of Nuclear Protein Sorting
Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
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...
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-kB-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...