Video Experimental Relacionado
Updated: Jun 27, 2026
10:56
Polysome Fractionation and Analysis of Mammalian Translatomes on a Genome-wide Scale
Published on: May 17, 2014
Regulación estricta de las proteínas no estructuradas: desde la síntesis de transcripción hasta la degradación de
Jörg Gsponer1, Matthias E Futschik, Sarah A Teichmann
1Medical Research Council (MRC) Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK. jgsponer@mrc-lmb.cam.ac.uk
Science (New York, N.Y.)
|November 29, 2008
Resumen
Las células controlan con precisión las proteínas intrínsecamente no estructuradas (IUP) a través de la depuración, degradación y traducción de la transcripción. Esta regulación asegura una correcta señalización celular y previene enfermedades patológicas como el cáncer.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Biología celular Biología celular.
- La bioquímica es la bioquímica.
Sus antecedentes:
- La abundancia alterada de proteínas intrínsecamente no estructuradas (IUP) está relacionada con las interrupciones de la señalización celular.
- Estas alteraciones pueden contribuir a condiciones patológicas, incluido el cáncer.
Objetivo del estudio:
- Investigar los mecanismos por los cuales las células regulan la disponibilidad de IUP.
- Para entender cómo el control preciso de los DIU afecta la señalización celular y previene las enfermedades.
Principales métodos:
- Análisis de las tasas de eliminación de transcripciones.
- Evaluación de las vías de degradación proteolítica.
- Medición de las tasas de traslación para las IUP.
- Cuantificación de los niveles de fosforilación de las proteínas.
Principales resultados:
- El aclaramiento de transcripción, la degradación proteolítica y la tasa de traslación se identificaron como mecanismos reguladores clave para la abundancia de IUP.
- Algunas IUP están presentes en cantidades bajas y por períodos cortos, lo que indica un ajuste fino.
- Los altos niveles de fosforilación y la baja estocasticidad en la transcripción y la traducción apoyan un control preciso de la disponibilidad de IUP.
Conclusiones:
- Los mecanismos celulares ajustan finamente la disponibilidad de proteínas intrínsecamente no estructuradas.
- La regulación precisa de las IUP es crucial para mantener la fidelidad de la señalización.
- El control adecuado de los DIU es esencial para prevenir la disfunción celular y las afecciones patológicas como el cáncer.
Videos de Conceptos Relacionados
01:23Regulation of Expression at Multiple Steps
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...
02:24Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
02:24Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
02:51mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
02:51mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
02:58Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...