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Correpresor

Un correpresor es una proteína que reduce la expresión génica mediante su unión a un activador o un factor de transcripción que contiene un dominio de unión al ADN. El correpresor es incapaz de unir ADN por sí mismo.[1]

El correpresor puede reprimir el inicio de la transcripción mediante el reclutamiento de histonas deacetilasas capaces de catalizar la retirada de los grupos acetilo de los residuos de lisina. De este modo, se incrementa la carga positiva neta de las histonas fortaleciendo su interacción con el ADN, lo que disminuye drásticamente la accesibilidad de la maquinaria basal de transcripción a los genes situados en la región diana.[2][3]

Referencias

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  1. Jenster G (1998). «Coactivators and corepressors as mediators of nuclear receptor function: an update». Mol Cell Endocrinol. 143 (1-2): 1-7. PMID 9806345. doi:10.1016/S0303-7207(98)00145-2. 
  2. Lazar MA (2003). «Nuclear receptor corepressors». Nucl Recept Signal 1 (Jun 12): e001. PMID 16604174. doi:10.1621/nrs.01001. 
  3. Goodson M, Jonas BA, Privalsky MA (2005). «Corepressors: custom tailoring and alterations while you wait». Nucl Recept Signal 3 (Oct 21): e003. PMID 16604171. doi:10.1621/nrs.03003. 

Véase también

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Enlaces externos

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Correpresor
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