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RNA Splicing01:32

RNA 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...
RNA Splicing01:32

RNA 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...
Alternative RNA Splicing02:18

Alternative 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...
What is Gene Expression?01:36

What is Gene Expression?

A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised  of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then processed and...
Pre-mRNA Processing: RNA Splicing01:32

Pre-mRNA Processing: RNA 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...
Alternative RNA Splicing02:18

Alternative 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...

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Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells
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Published on: April 26, 2017

El empalme de proteínas desencadenado por una pequeña molécula.

Henning D Mootz1, Tom W Muir

  • 1Laboratory of Synthetic Protein Chemistry, The Rockefeller University, 1230 York Avenue, New York, New York 10021, USA.

Journal of the American Chemical Society
|August 1, 2002
PubMed
Resumen

Los investigadores desarrollaron un nuevo método para controlar la función de las proteínas utilizando moléculas pequeñas. Esta técnica aprovecha el empalme de proteínas, lo que permite una regulación temporal precisa de la actividad de las proteínas en respuesta a la rapamicina.

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Área de la Ciencia:

  • Biología Química Biología química.
  • Biología Molecular Biología Molecular
  • La bioquímica es la bioquímica.

Sus antecedentes:

  • El control de la función de las proteínas con pequeñas moléculas ofrece una precisión temporal difícil de lograr con métodos genéticos.
  • Las estrategias actuales a menudo implican la unión directa a los sitios activos de la proteína o la inducción de cambios estructurales.
  • La alteración de la estructura primaria de una proteína a través de pequeñas moléculas presenta un mecanismo de control alternativo.

Objetivo del estudio:

  • Introducir una nueva técnica para controlar la función de las proteínas utilizando pequeñas moléculas.
  • Para aprovechar el empalme de proteínas para el control inducible de la actividad de las proteínas.
  • Desarrollar un método generalizable para la regulación de proteínas mediadas por pequeñas moléculas.

Principales métodos:

  • Aprovechando el empalme de proteínas, un proceso natural post-traducional.
  • Diseño de un sistema donde el empalme de proteínas es activado por la pequeña molécula rapamicina.
  • Desarrollar un método que sea independiente de las secuencias específicas de N- y C-extein.

Principales resultados:

  • Demostró una técnica que permite el empalme de proteínas exclusivamente en presencia de rapamicina.
  • Estableció un nuevo mecanismo para el control funcional de proteínas inducido por pequeñas moléculas.
  • Demostró el potencial de una amplia aplicabilidad en diferentes objetivos de proteínas.

Conclusiones:

  • La técnica desarrollada proporciona una plataforma generalizable para controlar la función de las proteínas con moléculas pequeñas.
  • Este enfoque ofrece una regulación temporal precisa de la actividad de las proteínas.
  • Este método avanza en el campo de la genética química al introducir una nueva herramienta para la manipulación de proteínas.