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RNA Structure01:23

RNA Structure

79.1K
Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
79.1K
RNA Structure01:19

RNA Structure

7.6K
The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
7.6K
Chromatin Structure and RNA Splicing02:41

Chromatin Structure and RNA Splicing

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RNA Stability01:53

RNA Stability

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.7K
Eukaryotic RNA Polymerases00:58

Eukaryotic RNA Polymerases

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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...
27.1K
Bacterial RNA Polymerase00:43

Bacterial RNA Polymerase

32.8K
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
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Video Experimental Relacionado

Updated: Feb 4, 2026

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
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Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

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SnapShot: Tecnologías de sondeo de la estructura del ARN

Paul D Carlson1, Molly E Evans2, Angela M Yu3

  • 1Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca NY; Center for Synthetic Biology, Northwestern University, Evanston IL.

Cell
|October 6, 2018
PubMed
Resumen
Este resumen es generado por máquina.

El sondeo químico combinado con la secuenciación de alto rendimiento es un método versátil para estudiar la estructura y la función del ARN. Este enfoque utiliza diversas sondas químicas para revelar información detallada sobre las moléculas de ARN en varios contextos biológicos.

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Área de la Ciencia:

  • Biología molecular
  • La bioquímica
  • La genética

Sus antecedentes:

  • Comprender la estructura del ARN es crucial para dilucidar sus diversas funciones celulares.
  • El sondeo químico es una técnica poderosa para mapear las estructuras secundarias y terciarias del ARN.
  • La secuenciación de alto rendimiento permite el análisis a gran escala de los datos de sondeo químico.

Objetivo del estudio:

  • Para resaltar la utilidad de la sonda química junto con la secuenciación de alto rendimiento para el análisis de la estructura del ARN.
  • Mostrar la flexibilidad de este enfoque en el estudio del ARN en diversos entornos biológicos.
  • Hacer hincapié en la amplia aplicabilidad de las sondas químicas para investigar la estructura y las interacciones del ARN.

Principales métodos:

  • Utilizando una variedad de sondas químicas dirigidas a diferentes características de ARN.
  • Aplicación de tecnologías de secuenciación de alto rendimiento para analizar datos de sondeo.
  • Integración de la exploración química con la secuenciación para la determinación de la estructura del ARN in vivo e in vitro.

Principales resultados:

  • Demostró la flexibilidad de la sonda química y la secuenciación para la aclaración de la estructura del ARN.
  • Mostró la capacidad de investigar la estructura del ARN tanto en entornos celulares como en entornos acelulares.
  • Destacó los conocimientos exhaustivos obtenidos sobre las características estructurales del ARN y las interacciones moleculares.

Conclusiones:

  • El sondeo químico junto con la secuenciación de alto rendimiento proporciona una plataforma robusta y adaptable para la investigación de la estructura del ARN.
  • La disponibilidad de varias sondas químicas amplía el alcance de las investigaciones estructurales.
  • Este enfoque integrado es esencial para comprender el papel del ARN en los procesos celulares.