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- W2071900535 abstract "The 2.0 A crystal structure of a nucleosome core particle in complex with a bivalent pyrrole-imidazole polyamide reveals that this clamp effectively crossbraces the two gyres of the DNA superhelix, thereby stabilizing the nucleosome against dissociation. Using X-ray crystallography and footprinting techniques, we show that the clamp preferentially binds nucleosomes over free DNA, and that nucleosomal DNA exists as a mixture of multiple twist-defect intermediates in solution. The nucleosomes exist in one of two different conformations in various crystal structures that trap twist-defect intermediates, even on a strong positioning sequence. Evidence has been obtained supporting the existence of twist-defect states in nucleosomal DNA in solution that are similar to those obtained in crystal structures. Our results also substantiate the idea that twist diffusion may represent an important means of altering the accessibility of nucleosomal DNA both in the presence and in the absence of ATP-dependent chromatin-remodelling enzymes." @default.
- W2071900535 created "2016-06-24" @default.
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- W2071900535 date "2005-01-01" @default.
- W2071900535 modified "2023-09-26" @default.
- W2071900535 title "Nucleosomes in Solution Exist as a Mixture of Twist-defect States" @default.
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- W2071900535 doi "https://doi.org/10.1016/j.jmb.2004.10.012" @default.
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