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Promoter Capture Hi-C: High-resolution, Genome-wide Profiling of Promoter Interactions
Published on: June 28, 2018
La flexión del ADN promotor en la unión del factor de transcripción de choque térmico
Nature
|October 2, 1986
Resumen
El factor de transcripción de choque térmico (HSTF) de Drosophila que se une al promotor hsp 70 induce una curvatura del ADN. Esta flexión se produce dentro de la región promotora crítica, influyendo en la activación transcripcional.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- La bioquímica es la bioquímica.
Sus antecedentes:
- La región de control del gen de la proteína de choque térmico 70 (hsp 70) de la Drosophila contiene sitios de unión al HSTF cruciales para la activación transcripcional.
- La región promotora de -40 a -95, que contiene dos sitios de unión HSTF contiguos (sitios 1 y 2), es crítica para la expresión del gen hsp 70.
- La unión cooperativa del HSTF a estos sitios y los posibles cambios conformacionales en el complejo proteína-ADN se han sugerido previamente.
Objetivo del estudio:
- Para investigar las consecuencias estructurales del factor de transcripción de choque térmico (HSTF) de Drosophila que se une al promotor hsp 70.
- Para determinar si la unión de HSTF a sus sitios específicos dentro del promotor hsp 70 induce la flexión del ADN.
Principales métodos:
- Análisis de la unión de HSTF a sitios contiguos individuales y dobles dentro de la región crítica de control del promotor hsp 70 (-40 a -95).
- Utilizando técnicas para detectar y caracterizar cambios estructurales en el ADN al unirse a las proteínas.
Principales resultados:
- La unión de HSTF a un solo sitio o a ambos sitios contiguos dentro del dominio especificado del promotor hsp 70 introduce una curva específica del ADN.
- Esta flexión del ADN es una consecuencia directa de la interacción del HSTF con sus sitios de unión.
Conclusiones:
- La unión de HSTF al promotor hsp 70 está asociada con un evento específico de flexión del ADN.
- Esta curvatura de ADN inducida puede desempeñar un papel en la activación transcripcional del gen hsp 70.
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