Title

Comprehensive mapping of long-range interactions reveals folding principles of the human genome

UMMS Affiliation

Program in Gene Function and Expression; Department of Biochemistry and Molecular Pharmacology

Date

10-10-2009

Document Type

Article

Medical Subject Headings

Biotin; Cell Line, Transformed; Cell Nucleus; Chromatin; Chromatin Immunoprecipitation; *Chromosomes, Human; Computational Biology; DNA; Gene Library; *Genome, Human; Humans; In Situ Hybridization, Fluorescence; Models, Molecular; Monte Carlo Method; Nucleic Acid Conformation; Principal Component Analysis; Protein Conformation; Sequence Analysis, DNA

Disciplines

Genetics and Genomics

Abstract

We describe Hi-C, a method that probes the three-dimensional architecture of whole genomes by coupling proximity-based ligation with massively parallel sequencing. We constructed spatial proximity maps of the human genome with Hi-C at a resolution of 1 megabase. These maps confirm the presence of chromosome territories and the spatial proximity of small, gene-rich chromosomes. We identified an additional level of genome organization that is characterized by the spatial segregation of open and closed chromatin to form two genome-wide compartments. At the megabase scale, the chromatin conformation is consistent with a fractal globule, a knot-free, polymer conformation that enables maximally dense packing while preserving the ability to easily fold and unfold any genomic locus. The fractal globule is distinct from the more commonly used globular equilibrium model. Our results demonstrate the power of Hi-C to map the dynamic conformations of whole genomes.

Rights and Permissions

Citation: Science. 2009 Oct 9;326(5950):289-93. Link to article on publisher's site

Related Resources

Link to Article in PubMed

PubMed ID

19815776