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Exploration of nucleosome positioning patterns in transcription factor function.
Kazumitsu Maehara1, Yasuyuki Ohkawa1
1Department of Advanced Medical Initiatives, JST-CREST, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka 812-8582, Japan.
Scientific Reports
|January 22, 2016
Summary
Unique nucleosome positioning (NP) patterns were identified around cis-regulatory elements. These distinct NP patterns correlate with gene expression levels and transcription factor binding sites, suggesting functional roles in chromatin.
Area of Science:
- Genomics
- Molecular Biology
- Epigenetics
Background:
- Transcription factors (TFs) activate gene expression by recruiting RNA polymerase to specific chromatin regions.
- Nucleosome positioning (NP) varies during gene expression and is implicated in other chromatin functions.
- The full diversity of NP related to specific chromatin functions remains unclear.
Purpose of the Study:
- To investigate the diversity of nucleosome positioning (NP) patterns.
- To determine the relationship between NP patterns and gene expression.
- To explore the association of NP patterns with transcription factor (TF) binding sites.
Main Methods:
- Utilized MNase-Seq data from 258 mouse cis-regulatory elements.
- Applied Principal Component Analysis (PCA) to identify NP patterns.
- Correlated NP patterns with gene expression levels and TF binding data.
Main Results:
- Identified five major nucleosome positioning (NP) patterns around cis-regulatory elements.
- Demonstrated that NP patterns predict gene expression levels.
- Observed specific NP patterns associated with transcription factor (TF) binding sites.
Conclusions:
- Nucleosome positioning (NP) exhibits diverse patterns around cis-regulatory elements.
- NP patterns are functionally correlated with gene expression and TF binding.
- These findings suggest NP plays a significant role in chromatin regulation and function.
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