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Videos de Conceptos Relacionados

Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Structure of a Gene01:30

Structure of a Gene

A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
Ribosome Profiling02:24

Ribosome Profiling

Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Eukaryotic RNA Polymerases00:58

Eukaryotic RNA Polymerases

RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...
Eukaryotic RNA Polymerases00:58

Eukaryotic RNA Polymerases

RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...

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Video Experimental Relacionado

Updated: Jul 6, 2026

Genome-wide Surveillance of Transcription Errors in Eukaryotic Organisms
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Genome-wide Surveillance of Transcription Errors in Eukaryotic Organisms

Published on: September 13, 2018

El genoma eucariótico como una máquina de ARN.

Paulo P Amaral1, Marcel E Dinger, Tim R Mercer

  • 1Institute for Molecular Bioscience, University of Queensland, St. Lucia QLD 4072, Australia.

Science (New York, N.Y.)
|March 29, 2008
PubMed
Resumen

Los genomas eucariotas producen numerosos ARN no codificantes de proteínas (ARNnc) que regulan la expresión génica y las funciones celulares. Investigaciones recientes revelan los diversos roles de estos ncRNA en el control de la dinámica del genoma, la biología celular y el desarrollo.

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Last Updated: Jul 6, 2026

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Área de la Ciencia:

  • La genómica es la genómica.
  • Biología Molecular Biología Molecular
  • Biología del desarrollo Biología del desarrollo.

Sus antecedentes:

  • Los genomas eucariotas se transcriben extensamente, produciendo una gran variedad de ARN no codificantes de proteínas (ARNnc).
  • Un creciente cuerpo de evidencia indica funciones regulatorias significativas para muchos de estos ncRNAs.
  • Comprender las funciones del ncRNA es crucial para descifrar procesos biológicos complejos.

Objetivo del estudio:

  • Para resaltar los avances recientes en la comprensión de las funciones de ARN no codificantes de proteínas.
  • Para ilustrar las diversas funciones reguladoras de los ncRNA.
  • Mostrar la participación del ncRNA en la dinámica del genoma, la biología celular y la programación del desarrollo.

Principales métodos:

  • Revisión de la literatura de estudios recientes sobre las funciones del ncRNA.
  • Análisis de los datos experimentales que demuestran la regulación mediada por el ncRNA.
  • Síntesis de hallazgos en diferentes contextos biológicos.

Principales resultados:

  • Demostración de la transcripción generalizada de los genomas eucarióticos en los ncRNAs.
  • Identificación de los diversos mecanismos regulatorios empleados por los ncRNAs.
  • Ejemplos de la participación del ncRNA en el control de la estabilidad del genoma, los procesos celulares y las vías de desarrollo.

Conclusiones:

  • Los ARN no codificantes de proteínas son reguladores clave en los eucariotas.
  • Los ncRNA juegan un papel crítico en la dinámica del genoma, la biología celular y el desarrollo.
  • Las investigaciones adicionales sobre las funciones del ncRNA descubrirán nuevos conocimientos biológicos.