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RNA Polymerase II Accessory Proteins02:36

RNA Polymerase II Accessory Proteins

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...
Transcription01:10

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription01:17

Transcription

Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
Transcription01:10

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription01:17

Transcription

Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
Co-activators and Co-repressors02:04

Co-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...

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03:34

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Las transiciones para regular la transcripción temprana.

Margaux Michel1, Patrick Cramer

  • 1Gene Center Munich and Department of Biochemistry, Ludwig-Maximilians-Universität München, Feodor-Lynen-Strasse 25, 81377 Munich, Germany.

Cell
|May 28, 2013
PubMed
Resumen

La regulación de la expresión génica implica la transcripción de la ARN polimerasa II (PolII). Kouzine y otros. revela el control de la fusión del ADN como un paso clave para limitar la velocidad de alargamiento del ARNm, que afecta la regulación génica.

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Área de la Ciencia:

  • Biología Molecular Biología Molecular
  • La bioquímica es la bioquímica.
  • Genética La genética.

Sus antecedentes:

  • La expresión génica se controla principalmente durante la fase de iniciación de la transcripción de la ARN polimerasa II (PolII).
  • Comprender los pasos que limitan la velocidad en la transcripción es crucial para descifrar la regulación génica.

Objetivo del estudio:

  • Para investigar el papel de la fusión del ADN en los pasos que limitan la velocidad del alargamiento productivo del ARNm.
  • Para contextualizar el control de la fusión del ADN dentro de transiciones energéticas más amplias en la transcripción.

Principales métodos:

  • El estudio realizado por Kouzine et al. Probablemente empleó técnicas bioquímicas y biofísicas para evaluar la dinámica de fusión del ADN durante la transcripción.
  • Análisis de las transiciones energéticas involucradas en la transcripción de la ARN polimerasa II.

Principales resultados:

  • El control de la fusión del ADN se identifica como un paso crítico que limita la velocidad para el alargamiento productivo del ARNm.
  • Este hallazgo pone de relieve un punto de control regulatorio clave en el proceso de transcripción.

Conclusiones:

  • La dinámica de fusión del ADN juega un papel fundamental en la regulación de la eficiencia de la producción de ARNm.
  • Estos hallazgos proporcionan nuevos conocimientos sobre el panorama energético de la iniciación y elongación de la transcripción.