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- W2082359849 abstract "Chromatin assembly is condensed by histone tail-tail interactions and other nuclear proteins into a highly compact structure. Using an optical trap modulation force spectroscopy, we probe the effect of tail interactions on local chromatin fluidity. Chromatin fibers, purified from mammalian cells, are tethered between a microscope coverslip and a glass micropipette. Mechanical unzipping of tail interactions, using the micropipette, lead to the enhancement of local fluidity. This is measured using an intensity-modulated optically trapped bead positioned as a force sensor on the chromatin fiber. Enzymatic digestion of the histone tail interactions of tethered chromatin fiber also leads to a similar increase in fluidity. Our experiments show that an initial increase in the local fluidity precedes chromatin decompaction, suggesting possible mechanisms by which chromatin-remodeling machines access regulatory sites." @default.
- W2082359849 created "2016-06-24" @default.
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- W2082359849 date "2006-12-01" @default.
- W2082359849 modified "2023-10-09" @default.
- W2082359849 title "Direct Measurement of Local Chromatin Fluidity Using Optical Trap Modulation Force Spectroscopy" @default.
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- W2082359849 doi "https://doi.org/10.1529/biophysj.106.086827" @default.
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