Video Experimental Relacionado
Updated: Apr 16, 2026

13:10
Use of Alu Element Containing Minigenes to Analyze Circular RNAs
Published on: March 10, 2020
7.8K
El temblor de la proteína de unión al ARN regula la formación de circRNAs
Simon J Conn1, Katherine A Pillman2, John Toubia2
1Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, SA 5000, Australia.
Cell
|March 14, 2015
Resumen
Los ARN circulares (circRNAs) se regulan durante los cambios celulares como EMT. La proteína Quaking (QKI) controla la producción de circRNA, lo que indica una síntesis intencionada y funciones específicas en los procesos celulares.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- ARN Biología Biología ARN
- Genética La genética.
Sus antecedentes:
- Los ARN circulares (circRNA) son ARN no codificantes prevalentes en los animales, pero su relevancia funcional sigue siendo objeto de debate.
- No está claro si los circRNAs son simplemente subproductos de empalme o moléculas reguladas activamente con roles celulares.
Objetivo del estudio:
- Para investigar la regulación de los circRNAs durante la transición epitelial-mesenquimal humana (EMT).
- Para determinar el papel del factor de empalme alternativo Quaking (QKI) en la producción de circRNA.
Principales métodos:
- Análisis de la expresión de circRNA durante la EMT.
- Investigando el impacto de los niveles de proteína Quaking (QKI) en la abundancia de circRNA.
- Evaluación del papel de los motivos de unión intrónicos de QKI en la formación de circRNA.
Principales resultados:
- Cientos de circRNAs se regulan dinámicamente durante la EMT.
- Más de un tercio de los circRNAs abundantes están regulados por Quaking (QKI), que a su vez se modula durante EMT.
- Los motivos de unión de QKI son cruciales para la producción regulada de circRNA, y su adición puede inducir la formación de novo de circRNA.
Conclusiones:
- Los circRNAs se sintetizan a propósito y su producción está regulada por mecanismos específicos del tipo celular.
- Estos hallazgos sugieren que los circRNA desempeñan funciones biológicas específicas, particularmente en el contexto de la EMT.
Videos de Conceptos Relacionados
Translational Regulation
875
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
875
Regulation of Expression at Multiple Steps
1.6K
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
1.6K
Types of RNA
74.2K
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
74.2K
Types of RNA
16.7K
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
RNA Performs Diverse...
16.7K
RNA Interference
28.9K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
28.9K
RNA Interference
7.9K
7.9K

