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• W2138101627 endingPage "984" @default.
• W2138101627 startingPage "976" @default.
• W2138101627 abstract "The accessibility of DNA is determined by the number, position, and stability of nucleosomes, complexes consisting of a core of 8 histone proteins with DNA wrapped around it. Since the structure and dynamics of nucleosomes affects essential cellular processes, they are the subject of many current studies. Here, high-speed atomic force microscopy is used to visualize dynamic processes in nucleosomes and tetrasomes (subnucleosomal structures that contain 4 rather than 8 histones in the protein core). Nucleosomes can spontaneously disassemble in a process (at a 1 second timescale). For tetrasomes, multiple dynamic phenomena are observed. For example, during disassembly the formation of a DNA loop (∼25 nm in length) is seen, which remains stable for several minutes. For intact tetrasomes, dynamics in the form of sliding and reversible hopping between stable positions along the DNA are observed. The data emphasize that tetrasomes are not merely static objects but highly dynamic. Since tetrasomes (in contrast to nucleosomes) can stay on the DNA during transcription, the observed tetrasome dynamics is relevant for an understanding of the nucleosomal dynamics during transcription. These results illustrate the diversity of nucleosome dynamics and demonstrate the ability of high speed AFM to characterize protein-DNA interactions." @default.
• W2138101627 created "2016-06-24" @default.
• W2138101627 creator A5013979543 @default.
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• W2138101627 date "2014-10-21" @default.
• W2138101627 modified "2023-09-23" @default.
• W2138101627 title "Dynamics of Nucleosomal Structures Measured by High-Speed Atomic Force Microscopy" @default.
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• W2138101627 doi "https://doi.org/10.1002/smll.201401318" @default.
• W2138101627 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25336288" @default.
• W2138101627 hasPublicationYear "2014" @default.
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