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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,...
Improving Translational Accuracy02:07

Improving Translational Accuracy

Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
RNA Editing02:23

RNA Editing

RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
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...
Directing Proteins to the Rough Endoplasmic Reticulum01:34

Directing Proteins to the Rough Endoplasmic Reticulum

The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
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,...

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Video Experimental Relacionado

Updated: May 12, 2026

TRAP-rc, Translating Ribosome Affinity Purification from Rare Cell Populations of Drosophila Embryos
10:26

TRAP-rc, Translating Ribosome Affinity Purification from Rare Cell Populations of Drosophila Embryos

Published on: September 10, 2015

Aprender a leer la ribosilación del ADP.

Henning Kleine1, Bernhard Lüscher

  • 1Institute of Biochemistry and Molecular Biology, Medical School, RWTH Aachen University, Pauwelsstrasse 30, Aachen, Germany.

Cell
|October 7, 2009
PubMed
Resumen

La ADP-ribosilación, una modificación de la proteína, regula las funciones celulares. Las proteínas con macrodómenos se unen a la poli-ADP-ribosa, mediando la respuesta al daño del ADN.

Área de la Ciencia:

  • La bioquímica es la bioquímica.
  • Biología Molecular Biología Molecular
  • Biología celular Biología celular.

Sus antecedentes:

  • La ribosilación de ADP es una modificación crucial después de la traducción.
  • Desempeña un papel importante en la regulación de la función e interacciones de las proteínas.
  • La evidencia emergente destaca sus amplias capacidades regulatorias.

Objetivo del estudio:

  • Para aclarar el papel de las proteínas que contienen macrodomain en los procesos celulares.
  • Comprender el mecanismo por el cual estas proteínas interactúan con la poli-ADP-ribosa.
  • Para investigar la conexión entre la unión al macrodomaín y la respuesta al daño del ADN.

Principales métodos:

  • Análisis de las interacciones proteína-macrodominio.

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De novo Identification of Actively Translated Open Reading Frames with Ribosome Profiling Data

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Measurement of Poly A Tail Length from Drosophila Larva Brain and Cell Line

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  • Pruebas bioquímicas para detectar la unión poli-ADP-ribosa.
  • Estudios celulares sobre las vías de respuesta al daño del ADN.

    • Principales resultados:

    • Se identificaron proteínas con macrodomaínos como aglutinantes de la poli-ADP-ribosa.
    • Esta interacción de unión es crítica para la señalización celular.
    • Los hallazgos establecen un vínculo entre las proteínas del macrodominio y la respuesta al daño del ADN.

    Conclusiones:

    • Las proteínas de macrodomaínas son mediadores clave en la respuesta celular al daño del ADN.
    • La unión de la poli-ADP-ribosa por los macrodómenos es un evento regulador fundamental.
    • Esta investigación avanza en la comprensión de la ADP-ribosilación en los mecanismos de reparación del ADN.