Video Experimental Relacionado
Updated: Jul 5, 2026
13:10
Use of Alu Element Containing Minigenes to Analyze Circular RNAs
Published on: March 10, 2020
Regulación del empalme alternativo mediante la edición de ARN
S M Rueter1, T R Dawson, R B Emeson
1Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-6600, USA.
Nature
|May 20, 1999
Resumen
La enzima ADAR2 regula su propia expresión mediante la edición de su pre-ARNm. Este proceso de edición de ARN controla el empalme alternativo, lo que influye en la producción de ARN mensajero.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- ARN Biología Biología ARN
Sus antecedentes:
- ADAR2 (adenosina desaminasa que actúa sobre el ARN 2) es crucial para la edición de ARN en los mamíferos.
- La edición de ARN convierte la adenosina en inosina en los ARN mensajeros.
- El empalme alternativo genera diversas transcripciones de ARNm de un solo gen.
Objetivo del estudio:
- Para investigar el papel de ADAR2 en la regulación de su propia expresión génica.
- Para identificar eventos de empalme alternativos en el ARNm ADAR2 de rata.
- Para explorar la interacción entre la edición de ARN y el empalme alternativo.
Principales métodos:
- Análisis de la secuencia de nucleótidos del ADN genómico ADAR2.
- Identificación de variantes alternativas de empalme en el ARNm de ADAR2.
- Análisis de los eventos de edición de ARN en el pre-ARNm.ADAR2 de ADAR2.
Principales resultados:
- Se identificaron dos eventos de empalme alternativos distintos en los ARNm ADAR2 de rata.
- El uso de un sitio aceptor de empalme proximal de 3' conduce a una inserción de 47 nucleótidos.
- ADAR2 edita su propio pre-ARNm, convirtiendo AA intrónico en IA, imitando los sitios de empalme AG.
Conclusiones:
- La edición de ARN por ADAR2 regula directamente el empalme alternativo de su propio pre-ARNm.
- Este mecanismo permite a ADAR2 modular sus propios niveles de expresión.
- ADAR2 emplea una nueva estrategia de autorregulación que incluye la edición y el empalme de ARN.
Videos de Conceptos Relacionados
01:32RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
01:32RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
02:18Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
02:23RNA 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...
03:21RNA-seq
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
02:18Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...