Cited by 120Estrogen and related hormone effectsGenomics and Chromatin DynamicsReceptor Mechanisms and Signaling

Differential recruitment of glucocorticoid receptor phospho-isoforms to glucocorticoid-induced genes

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Blind, Raymond D., Garabedian, Michael J.·2008·The Journal of Steroid Biochemistry and Molecular Biology

Abstract

The human glucocorticoid receptor (GR) is phosphorylated on its N-terminus at three major sites (S203, S211 and S226) within activation function 1 (AF1). Although GR has been shown to assemble at glucocorticoid responsive elements (GREs) in the presence of hormone, the timing and specificity of GR phospho-isoform recruitment to receptor target genes has not been established. Using chromatin immunoprecipitation (ChIP) and GR phosphorylation site-specific antibodies, we examined GR phospho-isoform recruitment to several glucocorticoid-induced genes including tyrosine aminotransferase (tat) and sulfonyltransferase-1A1 (sult) in rat hepatoma cells, and the glucocorticoid-induced leucine zipper (gilz) gene in human U2OS cells. GR P-S211 and GR P-S226 isoforms were efficiently recruited to the tat, sult and gilz GREs in a hormone-dependent manner. In contrast, the GR P-S203 isoform displayed no significant recruitment to any GREs of the genes analyzed, consistent with its lack of nuclear accumulation. Interestingly, the kinetics of GR P-S211 and GR P-S226 recruitment differed among genes. Our findings indicate that GR phospho-isoforms selectively occupy GR target genes, and suggests gene specific requirements for GR phosphorylation in receptor-dependent transcriptional activation.

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Crossref · 10.1016/j.jsbmb.2008.01.002

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Authors
Blind, R. D., & Garabedian, M. J.
Affiliations
  • New York University (US)
  • NYU Langone Health (US)
Corresponding author
Garabedian, Michael J.
Venue
The Journal of Steroid Biochemistry and Molecular Biology
Publisher
Elsevier BV
Published
2008-03
Volume
109
Issue
1-2
Pages
150-157
ISSN
0960-0760 (ISSN-L)
OpenAlex
W1990118125
Cited by
120
References
30
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 6 · 2022: 7 · 2021: 5 · 2020: 3 · 2019: 5 · 2018: 3 · 2017: 8 · 2016: 4 · 2015: 5 · 2014: 8 · 2013: 10 · 2012: 7
FWCI
8.38
Type
journal article
Language
en
Open access
Locations
  • The Journal of Steroid Biochemistry and Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK058024, R01DK054836, DK54836)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
glucocorticoid receptor, receptor phosphorylation, activation functions, glucocorticoid response element, tyrosine aminotransferase, GILZ, transcriptional activation, rat hepatoma cells, U2OS cells
MeSH terms
Animals, Base Sequence, Binding Sites, Dexamethasone, DNA, Humans, Phosphorylation, Receptors, Glucocorticoid, RNA, Messenger, Transcription Factors, Tyrosine Transaminase, Arylsulfotransferase, Transcriptional Activation, DNA Primers, Protein Isoforms, Cell Line, Tumor, Rats

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