H2A.Z landscapes and dual modifications in pluripotent and multipotent stem cells underlie complex genome regulatory functions
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gb-2012-13-10-r85.pdf
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Author(s)
Ku, Manching
Rheinbay, Esther
Endoh, Mitsuhiro
Koseki, Haruhiko
Koche, Richard Patrick
Jaffe, Jacob D.
Carr, Steven A.
Bernstein, Bradley E.
Date Issued
October 2012
Journal
Genome Biology
Publisher
BioMed Central Ltd
Citation
Genome Biology. 2012 Oct 03;13(10):R85
Version
Final published version
Abstract
Abstract Background The histone variant H2A.Z has been implicated in nucleosome exchange, transcriptional activation and Polycomb repression. However, the relationships among these seemingly disparate functions remain obscure. Results We mapped H2A.Z genome-wide in mammalian ES cells and neural progenitors. H2A.Z is deposited promiscuously at promoters and enhancers, and correlates strongly with H3K4 methylation. Accordingly, H2A.Z is present at poised promoters with bivalent chromatin and at active promoters with H3K4 methylation, but is absent from stably repressed promoters that are specifically enriched for H3K27 trimethylation. We also characterized post-translational modification states of H2A.Z, including a novel species dually-modified by ubiquitination and acetylation that is enriched at bivalent chromatin. Conclusions Our findings associate H2A.Z with functionally distinct genomic elements, and suggest that post-translational modifications may reconcile its contrasting locations and roles.
MIT Department
Harvard University--MIT Division of Health Sciences and Technology
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DOI of Published Version
https://doi.org/10.1186/gb-2012-13-10-r85
