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Curr Opin Cell Biol. 2012 Jun;24(3):359-66. doi: 10.1016/j.ceb.2012.03.003. Epub 2012 Mar 27.

Revisiting higher-order and large-scale chromatin organization.

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  • 1Department of Cell and Developmental Biology, University of Illinois, Urbana-Champaign, B107 CLSL, 601 S. Goodwin Ave, Urbana, IL 61801, USA.

Abstract

The past several years has seen increasing appreciation for plasticity of higher-level chromatin folding. Four distinct '30nm' chromatin fiber structures have been identified, while new in situ imaging approaches have questioned the universality of 30nm chromatin fibers as building blocks for chromosome folding in vivo. 3C-based approaches have provided a non-microscopic, genomic approach to investigating chromosome folding while uncovering a plethora of long-distance cis interactions difficult to accommodate in traditional hierarchical chromatin folding models. Recent microscopy based studies have suggested complex topologies co-existing within linear interphase chromosome structures. These results call for a reappraisal of traditional models of higher-level chromatin folding.

Copyright © 2012 Elsevier Ltd. All rights reserved.

PMID:
22459407
[PubMed - indexed for MEDLINE]
PMCID:
PMC3372662
Free PMC Article
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