Cited by 66Histone Deacetylase Inhibitors ResearchEstrogen and related hormone effectsGenomics and Chromatin Dynamics

Function of Histone Deacetylase 6 as a Cofactor of Nuclear Receptor Coregulator LCoR

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Palijan, Ana, Fernandes, Isabelle, Bastien, Yolande, Tang, Liqun, Verway, Mark, Kourelis, Maria, Tavera-Mendoza, Luz E., Li, Zhi +4 more·2009·Journal of Biological Chemistry

Abstract

Ligand-dependent corepressor LCoR was identified as a protein that interacts with the estrogen receptor alpha (ERalpha) ligand binding domain in a hormone-dependent manner. LCoR also interacts directly with histone deacetylase 3 (HDAC3) and HDAC6. Notably, HDAC6 has emerged as a marker of breast cancer prognosis. However, although HDAC3 is nuclear, HDAC6 is cytoplasmic in many cells. We found that HDAC6 is partially nuclear in estrogen-responsive MCF7 cells, colocalizes with LCoR, represses transactivation of estrogen-inducible reporter genes, and augments corepression by LCoR. In contrast, no repression was observed upon HDAC6 expression in COS7 cells, where it is exclusively cytoplasmic. LCoR binds to HDAC6 in vitro via a central domain, and repression by LCoR mutants lacking this domain was attenuated. Kinetic chromatin immunoprecipitation assays revealed hormone-dependent recruitment of LCoR to promoters of ERalpha-induced target genes in synchrony with ERalpha. HDAC6 was also recruited to these promoters, and repeat chromatin immunoprecipitation experiments confirmed the corecruitment of LCoR with ERalpha and with HDAC6. Remarkably, however, although we find evidence for corecruitment of LCoR and ERalpha on genes repressed by the receptor, LCoR and HDAC6 failed to coimmunoprecipitate, suggesting that they are part of distinct complexes on these genes. Although small interfering RNA-mediated knockdown of LCoR or HDAC6 augmented expression of an estrogen-sensitive reporter gene in MCF7 cells, unexpectedly their ablation led to reduced expression of some endogenous estrogen target genes. Taken together, these data establish that HDAC6 can function as a cofactor of LCoR but suggest that they may act in enhance expressing some target genes.

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Crossref · 10.1074/jbc.m109.045526

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Authors
Palijan, A., Fernandes, I., Bastien, Y., Tang, L., Verway, M., Kourelis, M., Tavera-Mendoza, L. E., Li, Z., Bourdeau, V., Mader, S., Yang, X. J., & White, J. H.
Affiliations
  • McGill University (CA)
  • Harvard University (US)
  • Institute for Research in Immunology and Cancer (CA)
Corresponding author
White, John H.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2009-10
Volume
284
Issue
44
Pages
30264-30274
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2084262863
Cited by
65
References
53
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2022: 5 · 2021: 2 · 2020: 2 · 2018: 5 · 2017: 9 · 2016: 4 · 2015: 4 · 2014: 5 · 2013: 6 · 2012: 8
FWCI
2.55
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (MT-11704)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Histone Deacetylase Inhibitors Research
  • 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
Keywords
HDAC6, nuclear receptor coregulators, estrogen receptor alpha, transcriptional repression, nuclear translocation, promoter recruitment, MCF-7 cells, breast cancer, HDAC3
MeSH terms
Histone Deacetylase 6, Breast Neoplasms, Estrogens, Female, Histone Deacetylases, Humans, Nuclear Proteins, Promoter Regions, Genetic, Repressor Proteins, Cell Line, Tumor, Estrogen Receptor alpha

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