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Videos de Conceptos Relacionados

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...
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...
Transposons01:24

Transposons

Transposons, or "jumping genes," are small mobile genetic elements (MGEs) that range from 700 to 40,000 base pairs in length. They are found in all organisms and can move within the same chromosome or transfer to different chromosomes. In some cases, transposons can also jump between different host DNA molecules, such as plasmids or viruses, contributing to genetic variability.Barbara McClintock first discovered these mobile genetic elements in the 1940s while studying maize genetics, and she...

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Video Experimental Relacionado

Updated: Jul 13, 2026

Examination of the Telomere G-overhang Structure in Trypanosoma brucei
15:25

Examination of the Telomere G-overhang Structure in Trypanosoma brucei

Published on: January 26, 2011

Hay evidencia de trans splicing en los tripanosomas.

R E Sutton, J C Boothroyd

    Cell
    |November 21, 1986
    PubMed
    Resumen

    Los ARN mensajeros del tripanosoma (ARNm) se sintetizan mediante el empalme trans. Una pequeña molécula de ARN (medRNA) proporciona el mini-exón 5 ', que se empalma con los exones codificantes de proteínas, produciendo ARNm maduro y un producto de ARNm libre.

    Área de la Ciencia:

    • Biología Molecular Biología Molecular
    • Parasitología Parasitología.
    • ARN Biología Biología ARN

    Sus antecedentes:

    • Los ARNm del tripanosoma poseen una secuencia de miniexones de 5' conservada.
    • Este mini-exón se transcribe por separado del exón principal codificador de proteínas.

    Objetivo del estudio:

    • Para investigar el mecanismo de síntesis de ARNm en los tripanosomas.
    • Para probar la hipótesis del trans splicing para la maduración del ARNm.

    Principales métodos:

    • Análisis del ARN del tripanosoma para la presencia de minRNA.
    • Ensayos de desbranqueamiento in vitro con extractos de células HeLa.

    Principales resultados:

    • Se detectaron cantidades significativas de minARN libre en las preparaciones de ARN tripanosómico.

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  • minRNA podría ser liberado de las estructuras de ARN más grandes por una enzima de desbranqueamiento.

    • Conclusiones:

    • El transsplicing es el mecanismo fisiológico para generar ARNm maduro en los tripanosomas.
    • Este proceso implica la unión de un mini-exón de medRNA a los exones codificadores de proteínas.