A library-based method to rapidly analyse chromatin accessibility at multiple genomic regions.

Abstract:

:Traditional chromatin analysis methods only test one locus at the time or use different templates for each locus, making a standardized analysis of large genomic regions or many co-regulated genes at different loci a difficult task. On the other hand, genome-wide high-resolution mapping of chromatin accessibility employing massive parallel sequencing platforms generates an extensive data set laborious to analyse and is a cost-intensive method, only applicable to the analysis of a limited set of biological samples. To close this gap between the traditional and the high-throughput procedures we have developed a method in which a condition-specific, genome-wide chromatin fragment library is produced and then used for locus-specific DNA fragment analysis. To validate the method, we used, as a test locus, the well-studied promoter of the divergently transcribed niiA and niaD genes coding for nitrate assimilation enzymes in Aspergillus. Additionally, we have used the condition-specific libraries to study nucleosomal positioning at two different loci, the promoters of the general nitrogen regulator areA and the regulator of secondary metabolism, aflR.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Basheer A,Berger H,Reyes-Dominguez Y,Gorfer M,Strauss J

doi

10.1093/nar/gkp037

subject

Has Abstract

pub_date

2009-04-01 00:00:00

pages

e42

issue

6

eissn

0305-1048

issn

1362-4962

pii

gkp037

journal_volume

37

pub_type

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