NDLI: The fractal globule as a model of chromatin architecture in the cell

Content Provider	Springer Nature Link
Author	Mirny, Leonid A.
Copyright Year	2011
Abstract	The fractal globule is a compact polymer state that emerges during polymer condensation as a result of topological constraints which prevent one region of the chain from passing across another one. This long-lived intermediate state was introduced in 1988 (Grosberg et al. 1988) and has not been observed in experiments or simulations until recently (Lieberman-Aiden et al. 2009). Recent characterization of human chromatin using a novel chromosome conformational capture technique brought the fractal globule into the spotlight as a structural model of human chromosome on the scale of up to 10 Mb (Lieberman-Aiden et al. 2009). Here, we present the concept of the fractal globule, comparing it to other states of a polymer and focusing on its properties relevant for the biophysics of chromatin. We then discuss properties of the fractal globule that make it an attractive model for chromatin organization inside a cell. Next, we connect the fractal globule to recent studies that emphasize topological constraints as a primary factor driving formation of chromosomal territories. We discuss how theoretical predictions, made on the basis of the fractal globule model, can be tested experimentally. Finally, we discuss whether fractal globule architecture can be relevant for chromatin packing in other organisms such as yeast and bacteria.
Starting Page	37
Ending Page	51
Page Count	15
File Format	PDF
ISSN	09673849
Journal	Chromosome Research
Volume Number	19
Issue Number	1
e-ISSN	15736849
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-01-28
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	chromatin chromosome territories conformational capture fractal globule Animal Genetics and Genomics Cell Biology Plant Genetics & Genomics Human Genetics
Content Type	Text
Resource Type	Article
Subject	Genetics

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