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Updated: Jul 20, 2026
10:16
Promoter Capture Hi-C: High-resolution, Genome-wide Profiling of Promoter Interactions
Published on: June 28, 2018
El receptor de progesterona estimula la transcripción libre de células al mejorar la formación de un complejo de
L Klein-Hitpass1, S Y Tsai, N L Weigel
1Department of Cell Biology, Baylor College of Medicine, Houston, Texas 77030.
Cell
|January 26, 1990
Resumen
El receptor de progesterona de pollo (cPR) estimula directamente la síntesis de ARN al unirse a los elementos de respuesta del ADN. La RCP sin hormonas también puede activar la transcripción, facilitando la formación del complejo de preiniciación.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Reglamento genético Reglamento genético.
- La bioquímica es la bioquímica.
Sus antecedentes:
- El receptor de progesterona (PR) es un receptor nuclear que regula la expresión génica en respuesta a la progesterona.
- Comprender los mecanismos precisos por los cuales la PR activa la transcripción es crucial para comprender sus funciones fisiológicas.
Objetivo del estudio:
- Para investigar el papel directo del receptor de progesterona de pollo purificado (cPR) en la estimulación de la síntesis de ARN.
- Para dilucidar los mecanismos moleculares subyacentes a la activación transcripcional mediada por la RCP.
Principales métodos:
- Ensayos de transcripción in vitro utilizando RCP purificada y plantillas de ADN que contienen elementos de respuesta a la progesterona (EPR).
- Estudios de vinculación cooperativa de la cPR a las PREs.
- Producción y análisis funcional de una proteína de fusión de dominio de unión al ADN cPR.
- Investigación de la activación independiente de las hormonas de la cPR.
Principales resultados:
- La RCP altamente purificada estimula directamente la síntesis de ARN in vitro.
- La estimulación transcripcional depende de la presencia de PREs y puede ser inhibida por oligonucleótidos competidores.
- La unión cooperativa de cPR a dos PREs conduce a una activación transcripcional sinérgica (27 veces).
- Una proteína de fusión del dominio de unión al ADN de la cPR también funciona en la transcripción.
- La RCP libre de hormonas, activada por el tratamiento con sal, induce la transcripción independientemente de las hormonas.
- La evidencia sugiere que la RCP facilita la formación estable del complejo de preiniciación.
Conclusiones:
- El receptor de progesterona del pollo estimula directamente la transcripción al unirse a las PREs.
- La unión de la cPR a las PREs es cooperativa y mejora la transcripción sinérgicamente.
- La activación independiente de las hormonas de la RCP es posible e implica facilitar la formación del complejo de preiniciación.
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