New insights into 3D structure of human genome!

Last Updated: Friday, March 26, 2010 - 18:14

Washington: In what could be called a
major breakthrough, scientists have gained fresh insights into
the three-dimensional organisation of the human genome.

A team from University of Regensburg and the Ludwig
Maximilians University in Germany and Centro de Investigacin
Prncipe Felipe in Spain has published its findings in the
`PLoS Genetics` journal.

One major challenge of the post-genomic era
is to understand how the genome is organised inside the cell`s
nucleus to fulfill the dynamics and regulation of DNA access
to regulatory factors.

Previous studies on the nuclear architecture of the
cell suggest that the three-dimensional structure of genomic
information is non-random. However, few discrete genomic loci
have been analysed for their spatial location, prompting the
current study.

The researchers, led by Attila Nmeth and
Gernot Lngst, examined the DNA network of the nucleolus, the
nucleus` largest sub-compartment, using sequencing, microarray
analysis, and single-cell analysis.

The work resulted in a high-resolution sequence
map of this nuclear structure, detailing the position of the
several thousand genes and non-coding sequences that form the
nucleolus within the three-dimensional space of the nucleus.
"The results help us understand how nuclear
information is packaged into functional compartments of the
nucleus," the scientists said.

At the same time, they emphasise that this research
was confined to just two cell types, and that further studies
are needed to address the conservation of these packaging
mechanisms during evolution, and to monitor the developmental
dynamics of three-dimensional genome organisation.

PTI



First Published: Friday, March 26, 2010 - 18:14

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