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Updated: Jul 27, 2026
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Promoter Capture Hi-C: High-resolution, Genome-wide Profiling of Promoter Interactions
Published on: June 28, 2018
Un potenciador estimula la transcripción en trans cuando se une al promotor a través de un puente proteico
H P Müeller-Storm1, J M Sogo, W Schaffner
1Institut für Molekularbiologie II der Universität Zürich, Switzerland.
Cell
|August 25, 1989
Resumen
Este estudio muestra que los potenciadores pueden estimular la transcripción génica incluso cuando no están físicamente conectados al ADN, apoyando el modelo de bucle de ADN sobre el modelo de escaneo para la regulación génica.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Regulación genética Reglamento genético.
- La bioquímica es la bioquímica.
Sus antecedentes:
- Dos modelos explican la función del potenciador: el bucle de ADN y el escaneo de ADN.
- Se pensaba que los potenciadores actuaban sólo en el ADN en una configuración cis.
Objetivo del estudio:
- Para probar si los potenciadores pueden estimular la transcripción en trans.
- Para diferenciar entre el bucle de ADN y los modelos de escaneo de la función del potenciador.
Principales métodos:
- Se realizaron ensayos de transcripción in vitro.
- Los potenciadores (SV40, citomegalovirus) fueron unidos no covalentemente a un promotor (beta-globina) mediante el uso de estreptavidina/avidina.
Principales resultados:
- Los potenciadores estimulan la transcripción incluso cuando no están unidos covalentemente al promotor.
- Esta configuración trans apoya el modelo de bucle de ADN.
Conclusiones:
- Los hallazgos son consistentes con el modelo de bucle de ADN.
- La estimulación de la transcripción en trans puede ocurrir en sistemas biológicos como la transvección.
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