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Extra views on structure and dynamics of DNA loops on nucleosomes studied with molecular simulations

机译:通过分子模拟研究核小体上DNA环的结构和动力学的额外观点

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It has been shown experimentally that the action of the RSC chromatin remodeler leads to the formation of an irregular, partially remodeled nucleosome, termed a remosome. The remosome contains an extra 30-40 base pairs of DNA compared to a canonical nucleosome. Large-scale molecular simulations have provided information on the probable structure of remosomes and have explained why they remain stable in the absence of RSC. Here we explain how these simulations were carried out and what the resulting remosome models imply in terms of the mechanism of action of RSC. We notably show that local kinks within DNA are key in explaining how extra DNA can be in added to nucleosomes without unduly disturbing DNA-histone binding.
机译:实验表明,RSC染色质重塑剂的作用导致形成不规则的,部分重塑的核小体,称为核小体。与标准核小体相比,该重组体包含额外的30-40个碱基对的DNA。大规模的分子模拟提供了有关Remosomes可能结构的信息,并解释了为什么在没有RSC的情况下它们仍保持稳定。在这里,我们解释了这些模拟是如何进行的,以及由此产生的Remosome模型在RSC的作用机理方面的含义。我们特别指出,DNA中的局部纽结是解释如何在不过度干扰DNA与组蛋白结合的情况下将额外的DNA添加到核小体中的关键。

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