Cited by 71Genomics and Chromatin DynamicsLiver physiology and pathologyHepatocellular Carcinoma Treatment and Prognosis

Hepatocyte Nuclear Factor 4 enhances the Hepatocyte Nuclear Factor 1 -mediated activation of transcription

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Eeckhoute, J.·2004·Nucleic Acids Research

Abstract

Hepatocyte Nuclear Factor 1alpha (HNF1alpha) and Hepatocyte Nuclear Factor 4alpha (HNF4alpha) are two liver-enriched transcription factors coexpressed in specific tissues where they play a crucial role through their involvement in a complex cross-regulatory network. HNF1alpha down regulates HNF4alpha-mediated activation of transcription via a direct protein-protein interaction. Here we show that HNF4alpha enhances the transcriptional activity of HNF1alpha in a DNA binding independent manner, thus indicating that it behaves as a HNF1alpha coactivator. Using mutations in the ligand binding domain (LBD) of HNF4alpha, we confirmed the involvement of the Activation Function 2 module and demonstrated the requirement of the integrity of the LBD for the interaction with HNF1alpha. Moreover, we show that HNF4alpha cooperates with p300 to achieve the highest HNF1alpha-mediated transcription rates. Our findings highlight a new way by which HNF4alpha can regulate gene expression and extend our knowledge of the complexity of the transcriptional network involving HNF4alpha and HNF1alpha.

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Crossref · 10.1093/nar/gkh581

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Authors
Eeckhoute, J.
Affiliations
Inserm (FR)
Corresponding author
Eeckhoute, J.
Venue
Nucleic Acids Research
Published
2004-04-28
Volume
32
Issue
8
Pages
2586-2593
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2007722784
Cited by
71
References
43
Citations by year
2026: 2 · 2025: 4 · 2024: 3 · 2022: 3 · 2021: 6 · 2020: 5 · 2019: 2 · 2018: 2 · 2017: 6 · 2016: 6 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 4
FWCI
1.66
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Health Sciences › Medicine › Hepatology › Hepatocellular Carcinoma Treatment and Prognosis
Keywords
HNF4α, HNF1A, transcriptional coactivator, transcriptional activation, protein-protein interaction, ligand-binding domain, AF-2, P300, liver-enriched transcription factors, transcriptional regulation, gene expression regulation
MeSH terms
DNA-Binding Proteins, HeLa Cells, Humans, Nuclear Proteins, Phosphoproteins, Transcription Factors, Transcriptional Activation, Trans-Activators, Protein Structure, Tertiary, Hepatocyte Nuclear Factor 1, Hepatocyte Nuclear Factor 1-alpha, Hepatocyte Nuclear Factor 4

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