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Binding of estrogen receptor α/β heterodimers to chromatin in MCF-7 cells

Binding of estrogen receptor α/β heterodimers to chromatin in MCF-7 cells Estrogen receptors (ERs), ERα and ERβ, belong to a group of transcription factors that, upon ligand binding, regulate geneexpression by binding to specific DNA regions in chromatin as dimers. In this article, we applied the sequential chromatinimmunoprecipitation assay (Re-ChIP) to study the simultaneous presence of ERα and ERβ on various DNA-binding regions in intactchromatin. ERα/β heterodimers were isolated by precipitation with anti-ERβ antibody followed by anti-ERα antibody from a stableMCF-7-derived cell line that expresses endogenous ERα and an inducible version of ERβ. The Re-ChIP method was first validatedbased on the detection of ERα/β heterodimers bound to a promoter region of the pS2 gene known to bind both ERα and ERβ. We next examined 12 ER-binding sites using Re-ChIP assays for ERα/β heterodimer recruitment.Our results confirmed the recruitment of ERα/β heterodimers to all these regions. This study represents the first demonstrationof binding of ERα/β heterodimers to various DNA-binding regions in intact chromatin. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Molecular Endocrinology Bioscientifica

Binding of estrogen receptor α/β heterodimers to chromatin in MCF-7 cells

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References (33)

Publisher
Bioscientifica
Copyright
© 2009 Society for Endocrinology
ISSN
0952-5041
eISSN
1479-6813
DOI
10.1677/JME-08-0177
pmid
19376833
Publisher site
See Article on Publisher Site

Abstract

Estrogen receptors (ERs), ERα and ERβ, belong to a group of transcription factors that, upon ligand binding, regulate geneexpression by binding to specific DNA regions in chromatin as dimers. In this article, we applied the sequential chromatinimmunoprecipitation assay (Re-ChIP) to study the simultaneous presence of ERα and ERβ on various DNA-binding regions in intactchromatin. ERα/β heterodimers were isolated by precipitation with anti-ERβ antibody followed by anti-ERα antibody from a stableMCF-7-derived cell line that expresses endogenous ERα and an inducible version of ERβ. The Re-ChIP method was first validatedbased on the detection of ERα/β heterodimers bound to a promoter region of the pS2 gene known to bind both ERα and ERβ. We next examined 12 ER-binding sites using Re-ChIP assays for ERα/β heterodimer recruitment.Our results confirmed the recruitment of ERα/β heterodimers to all these regions. This study represents the first demonstrationof binding of ERα/β heterodimers to various DNA-binding regions in intact chromatin.

Journal

Journal of Molecular EndocrinologyBioscientifica

Published: Aug 1, 2009

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