Cited by 629Histone Deacetylase Inhibitors ResearchGenomics and Chromatin DynamicsEstrogen and related hormone effects

Both corepressor proteins SMRT and N‐CoR exist in large protein complexes containing HDAC3

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Li, Jiwen, Wang, Jin, Wang, Jianxiang, Nawaz, Zafar, Liu, Johnson M., Qin, Jun, Wong, Jiemin·2000·The EMBO Journal

Abstract

We present evidence that both corepressors SMRT and N-CoR exist in large protein complexes with estimated sizes of 1.5-2 MDa in HeLa nuclear extracts. Using a combination of conventional and immunoaffinity chromatography, we have successfully isolated a SMRT complex and identified histone deacetylase 3 (HDAC3) and transducin (beta)-like I (TBL1), a WD-40 repeat-containing protein, as the subunits of the purified SMRT complex. We show that the HDAC3-containing SMRT and N-CoR complexes can bind to unliganded thyroid hormone receptors (TRs) in vitro. We demonstrate further that in Xenopus oocytes, both SMRT and N-CoR also associate with HDAC3 in large protein complexes and that injection of antibodies against HDAC3 or SMRT/N-CoR led to a partial relief of repression by unliganded TR/RXR. These findings thus establish both SMRT and N-CoR complexes as bona fide HDAC-containing complexes and shed new light on the molecular pathways by which N-CoR and SMRT function in transcriptional repression.

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Crossref · 10.1093/emboj/19.16.4342

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  • HDAC3 appears to be uniquely recruited to the SMRT/NCoR complex, where it interacts with a conserved deacetylase-activation-domain (DAD) within SMRT or NCoR.

    “In contrast, HDAC3 appears to be uniquely recruited to the SMRT/NCoR complex where it interacts with a conserved deacetylase-activation-domain (DAD) within SMRT or NCoR8,10,12,24,25,26.”

    From Structure of Hdac3 Bound to Co-Repressor and Inositol Tetraphosphate (2012) · cites this paper as [8]

    The section “SMRT and N-CoR complexes as a new class of HDAC-containing complexes” establishes that HDAC3 is a stable subunit of both complexes, and “HDAC3 may interact directly with N-CoR” maps regions that interact with HDAC3. The paper does not identify a conserved deacetylase-activation domain (DAD) in either corepressor or establish that HDAC3 is uniquely recruited to these complexes; its discussion considers the recruitment of multiple HDACs. Page numbers are unavailable in our copy. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • HDACs 1, 2 and 3 require association with large multisubunit corepressor complexes for maximal activity.

    “HDACs 1, 2 and 3 require association with large multisubunit corepressor complexes for maximal activity7-12.”

    From Structure of Hdac3 Bound to Co-Repressor and Inositol Tetraphosphate (2012) · cites this paper as [8]

    The section “SMRT and N-CoR complexes as a new class of HDAC-containing complexes” reports that HDAC3 is a stable component of large corepressor complexes, and “The majority of SMRT and N-CoR complexes may contain HDAC3” reports strong deacetylase activity in those complexes. The Introduction also describes an HDAC1/2-containing mSin3 complex. None of these passages establishes that association with a complex is required for maximal activity of HDACs 1, 2, and 3. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Recent studies indicate that the corepressors N-CoR and SMRT are preferentially assembled into the HDAC3 complex, but not into the HDAC1 or HDAC2 complex, suggesting that HDAC3 has a functional activity distinct from those of other class I histone deacetylases.

    “recent studies indicate that the corepressors N-CoR and SMRT are preferentially assembled into the HDAC3 complex, but not into the HDAC1 or HDAC2 complex, suggesting that HDAC3 has a functional activity distinct from those of other class I histone deacetylases (27, 58).”

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Authors
Li, J., Wang, J., Wang, J., Nawaz, Z., Liu, J. M., Qin, J., & Wong, J.
Affiliations
  • National Institutes of Health (US)
  • Baylor College of Medicine (US)
Corresponding author
Wong, Jiemin
Venue
The EMBO Journal
Published
2000-08-15
Volume
19
Issue
16
Pages
4342-4350
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2072793384
Cited by
629
References
47
Citations by year
2026: 9 · 2025: 10 · 2024: 13 · 2023: 20 · 2022: 18 · 2021: 14 · 2020: 19 · 2019: 12 · 2018: 20 · 2017: 17 · 2016: 22 · 2015: 21 · 2014: 16 · 2013: 24 · 2012: 38
FWCI
11.82
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK056324, DK 56324)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Histone Deacetylase Inhibitors Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
Keywords
SMRT, NCoR, HDAC3, TBL1, thyroid hormone receptor, retinoid X receptor, transcriptional repression, nuclear receptor corepressor, protein complex purification
MeSH terms
Histone Deacetylase 3, Animals, Cell Nucleus, Chromatography, Affinity, Chromatography, Gel, Chromatography, Ion Exchange, Cloning, Molecular, DNA-Binding Proteins, HeLa Cells, Histone Deacetylases, Humans, Ligands, Nuclear Proteins, Oocytes, Plasmids, Protein Binding, Receptors, Thyroid Hormone, Recombinant Proteins, Repressor Proteins, Transcription, Genetic, Xenopus, Blotting, Western, Receptors, Retinoic Acid, Two-Hybrid System Techniques, Nuclear Receptor Co-Repressor 1, Nuclear Receptor Co-Repressor 2

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