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Translation in Prokaryotes01:29

Translation in Prokaryotes

48
Prokaryote translation is a complex, highly coordinated process that converts genetic information from mRNA into functional proteins. It involves three stages: initiation, elongation, and termination, each facilitated by specific molecular components.Initiation of TranslationThe process begins with the assembly of the ribosomal subunits and initiation factors on the mRNA. In bacteria, the 30S ribosomal subunit recognizes the Shine-Dalgarno sequence in the mRNA, a conserved region upstream of...
48
Translation01:31

Translation

142.5K
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
142.5K
Leaky Scanning02:28

Leaky Scanning

5.2K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.2K
Improving Translational Accuracy02:07

Improving Translational Accuracy

11.7K
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...
11.7K
Initiation of Translation02:33

Initiation of Translation

6.5K
6.5K
Ribosome Profiling02:24

Ribosome Profiling

3.6K
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...
3.6K

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Video Experimental Relacionado

Updated: Jul 25, 2025

De novo Identification of Actively Translated Open Reading Frames with Ribosome Profiling Data
08:23

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

Published on: February 18, 2022

3.6K

Mapeo de la traducción del ARN

Rong Fan1

  • 1Department of Biomedical Engineering, Yale University, New Haven, CT, USA.

Science (New York, N.Y.)
|June 29, 2023
PubMed
Resumen
Este resumen es generado por máquina.

Un nuevo método mapea con precisión la ubicación de miles de ARN traductores dentro de las células y los tejidos. Este avance permite una comprensión más profunda de la expresión génica y la función celular.

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Área de la Ciencia:

  • Biología molecular
  • Biología celular
  • La genómica

Sus antecedentes:

  • Los ARN traductores (transcritos) son cruciales para la síntesis de proteínas.
  • La comprensión de la distribución espacial de los ARN traductores proporciona información sobre la función y la regulación celular.
  • Los métodos actuales tienen limitaciones en el mapeo de la ubicación de miles de ARN traductores simultáneamente.

Objetivo del estudio:

  • Desarrollar y validar un nuevo método para el mapeo de alto rendimiento de la localización del ARN traductor.
  • Para permitir la visualización de la traducción de la distribución de ARN en varios contextos celulares y de tejido.

Principales métodos:

  • Desarrollo de una nueva técnica para la hibridación in situ y las imágenes.
  • Optimización de los protocolos para el análisis de células individuales y de tejidos.
  • Utilizando microscopía avanzada y análisis computacional para el procesamiento de datos.

Principales resultados:

  • Mapeó con éxito las ubicaciones de miles de moléculas individuales de ARN traductoras.
  • Demostró la eficacia del método en diversos tipos de células y muestras de tejido.
  • Se identificaron patrones de localización distintos para varios ARN traductores.

Conclusiones:

  • El nuevo método ofrece una resolución sin precedentes para estudiar la localización del ARN.
  • Esta técnica avanzará en la investigación de la expresión génica, la biología celular y los mecanismos de las enfermedades.
  • Proporciona una herramienta poderosa para futuros estudios de biología molecular y espacial.