NXSensor web tool for evaluating DNA for nucleosome exclusion sequences and accessibility to binding factors.

Abstract:

:Nucleosomes, a basic structural unit of eukaryotic chromatin, play a significant role in regulating gene expression. We have developed a web tool based on DNA sequences known from empirical and theoretical studies to influence DNA bending and flexibility, and to exclude nucleosomes. NXSensor (available at http://www.sfu.ca/~ibajic/NXSensor/) finds nucleosome exclusion sequences, evaluates their length and spacing, and computes an 'accessibility score' giving the proportion of base pairs likely to be nucleosome-free. Application of NXSensor to the promoter regions of housekeeping (HK) genes and those of tissue-specific (TS) genes revealed a significant difference between the two classes of gene, the former being significantly more open, on average, particularly near transcription start sites (TSSs). NXSensor should be a useful tool in assessing the likelihood of nucleosome formation in regions involved in gene regulation and other aspects of chromatin function.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Luykx P,Bajić IV,Khuri S

doi

10.1093/nar/gkl158

subject

Has Abstract

pub_date

2006-07-01 00:00:00

pages

W560-5

issue

Web Server issue

eissn

0305-1048

issn

1362-4962

pii

34/suppl_2/W560

journal_volume

34

pub_type

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