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Structural determinants of nuclear receptor assembly on DNA direct repeats.

机译:DNA直接重复序列上核受体装配的结构决定因素。

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Nuclear receptor heterodimers recognize response elements composed of two direct repeats of the consensus sequence 5'-AGGTCA-3' separated by one to five base pairs. The 1.9 A crystal structure of the complex formed by the DNA-binding domains of the 9-cis retinoic acid receptor and thyroid hormone receptor bound to a thyroid-response element shows that the subunits interact through a DNA-supported interface involving the carboxy-terminal extension of the DNA-binding domain of the thyroid hormone receptor. The stereochemistry suggests a mechanism by which heterodimers recognize the inter-half-site spacing between direct repeats.
机译:核受体异二聚体识别应答元件,该应答元件由共有序列5'-AGGTCA-3'的两个直接重复组成,该重复重复由一到五个碱基对分隔。由结合于甲状腺反应元件的9-顺式视黄酸受体和甲状腺激素受体的DNA结合结构域形成的复合物的1.9 A晶体结构表明,这些亚基通过包含羧基末端的DNA支持的界面相互作用甲状腺激素受体的DNA结合结构域的延伸。立体化学提示异二聚体识别直接重复之间的半位点间间隔的机制。

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