Higher-order structure of long repeat chromatin.
نویسندگان
چکیده
منابع مشابه
Higher order structure in a short repeat length chromatin
Polynucleosomes from calf brain cortical neurone nuclei have an average repeat length of less than 168 base pairs. The ability of this material to adopt higher order structure has been assessed by various physical techniques. Although containing on average less DNA per nucleosome than is required to form a chromatosome, this short repeat length chromatin folded in an H1 dependent manner to a st...
متن کاملMethods for identifying higher-order chromatin structure.
Eukaryotic genomic DNA is combined with histones, nonhistone proteins, and RNA to form chromatin, which is extensively packaged hierarchically to fit inside a cell's nucleus. The nucleosome-comprising a histone octamer with 147 base pairs of DNA wrapped around it-is the initial level and the repeating unit of chromatin packaging, which electron microscopy first made visible to the human eye as ...
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The primary role of the nucleus as an information storage, retrieval, and replication site requires the physical organization and compaction of meters of DNA. Although it has been clear for many years that nucleosomes constitute the first level of chromatin compaction, this contributes a relatively small fraction of the condensation needed to fit the typical genome into an interphase nucleus or...
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The billions of DNA bases that comprise mammalian genomes encode the instructions to assemble complex organisms consisting of hundreds of different cell types. Apart from the challenge of packaging this genetic material into a nuclear space that is six orders of magnitude smaller than its linear sequence, the molecules need to be organised in such a way as to ensure the coordinated activity of ...
متن کاملStatistical Mechanics of Nucleosomes Constrained by Higher-Order Chromatin Structure.
Eukaryotic DNA is packaged into chromatin: one-dimensional arrays of nucleosomes separated by stretches of linker DNA are folded into 30-nm chromatin fibers which in turn form higher-order structures (Felsenfeld and Groudine in Nature 421:448, 2003). Each nucleosome, the fundamental unit of chromatin, has 147 base pairs (bp) of DNA wrapped around a histone octamer (Richmond and Davey in Nature ...
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ژورنال
عنوان ژورنال: The EMBO Journal
سال: 1985
ISSN: 0261-4189
DOI: 10.1002/j.1460-2075.1985.tb04064.x