Video Experimental Relacionado
Updated: May 11, 2026

10:45
iCLIP - Transcriptome-wide Mapping of Protein-RNA Interactions with Individual Nucleotide Resolution
Published on: April 30, 2011
Secuencia completa de las regiones no codificantes constantes y 3' de un ARNm de inmunoglobulina utilizando el método
Cell
|November 1, 1978
Resumen
Los investigadores secuenciaron el ARNm de cadena ligera de inmunoglobulina de ratón, determinando 532 nucleótidos de las regiones constantes y 3' no codificantes. Esta secuencia de ADNc confirma la secuencia de ARNm y corrige una reorganización menor de aminoácidos.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- Inmunología Inmunología.
Sus antecedentes:
- Comprender la expresión génica de las inmunoglobulinas es crucial para la inmunología.
- La secuenciación precisa del ARNm proporciona información sobre la síntesis de proteínas y la regulación génica.
Objetivo del estudio:
- Para determinar la secuencia de nucleótidos de la inmunoglobulina de ratón de cadena ligera mRNA.
- Para analizar las regiones constantes y 3' no codificantes del ARNm.
- Para validar el método de secuenciación de ADNc para el análisis de ARNm.
Principales métodos:
- Síntesis de tres oligonucleótidos sintéticos complementarios al ARNm de cadena ligera de inmunoglobulina de ratón.
- Adaptación del método de secuenciación de ADN de Sanger, Nicklen y Coulson para el ARNm.
- Determinación de una secuencia de ADNc continua de 532 nucleótidos.
Principales resultados:
- Se obtuvo una secuencia de 532 nucleótidos, que cubre toda la región constante (321 nucleótidos) y la región no codificante 3' (211 nucleótidos).
- El codón de terminación U-A-G fue identificado en la posición esperada.
- La secuencia de nucleótidos coincidía en gran medida con los hallazgos anteriores y la secuencia de aminoácidos conocida, con una revisión menor necesaria para cuatro aminoácidos.
Conclusiones:
- El estudio determinó con éxito una porción significativa de la secuencia de ARNm de cadena ligera de inmunoglobulina de ratón.
- Los hallazgos validan el método de secuenciación de ADN adaptado para el análisis de ARNm.
- Fue necesaria una revisión de la secuencia de aminoácidos, confirmando la exactitud de la secuencia de ácido nucleico.
Videos de Conceptos Relacionados
Complementary DNA
Overview
RACE - Rapid Amplification of cDNA Ends
Rapid Amplification of cDNA Ends, or RACE, is one of the most effective methods to obtain a full-length cDNA from an mRNA sequence between a known internal region to the unknown sequence at the 5’ or 3’ end. The unknown region is cloned in the cDNA by a gene-specific primer that binds the known end, and a hybrid primer that attaches a predefined anchor sequence to the unknown end of the cDNA. The sequence in between is amplified by PCR with an anchor primer and a gene-specific primer.
Since the...
Since the...
Sanger Sequencing
DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
Next-generation Sequencing
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
RNA-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...
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...
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...

